The Peptide Bible
The simple guide to therapeutic peptides
Table of Contents
​
Metabolism & Fat Loss
​
1) Retatrutide
2) Tesamorelin
3) MOTS-c
4) SLU-PP-322
5) 5-Amino-1MQ
Cosmetic & Skin
6) Melanotan II
7) GHK-Cu
8) Glutathione
9) Snap-8
​
Repair & Regeneration
​
10) KPV
11) BPC-157
12) TB-500
13) LL-37
​
Brain & Nervous System
​
14) Semax
15) Selank
16) DSIP
​
Mitochondrial & Longevity
​
17) Pinealon
18) Thymosin Alpha-1
19) Thymalin
20) Epitalon
21) NAD+
22) SS-31
​
Sexual Health
​
23) PT-141
24) HCG
25) Kisspeptin-10
​
Hormone & Growth Axis
​
26) HGH
27) CJC-1295 no DAC
28) CJC-1295 with DAC
29) Ipamorelin
​
Administration & Guidelines
​
30) Peptide Administration
​
Peptide Stacking Guide
​
31) GLOW Stack
32) KLOW Stack
33) Metabolic Reset Stack
34) GH Stack
35) Wolverine Stack
36) Libido Stack
37) Recovery & Repair Stack
38) Mito Stack
39) Calm Focus Stack
40) Longevity Stack
41) Hormone Stack
​
Safety & Disclaimers
​
42) Guidelines & Disclaimers (Page 1)
43) Guidelines & Disclaimers (Page 2)
​
The Peptide Bible
The simple guide to therapeutic peptides
1) Retatrutide
"Triple Switch"
Best For:
Fat loss, appetite control, metabolic reset
Mechanism:
Retatrutide is a triple agonist at the GLP-1, GIP, and glucagon receptors. That combination is why it
is more than just an appetite drug — it changes appetite, glucose handling, and energy expenditure
at the same time.
Simple Explanation:
One arm tells the brain and gut “you’re full,” another helps the pancreas and tissues handle
incoming nutrients better, and the glucagon arm pushes the liver and body toward releasing and
burning stored fuel.
Benefits:
• Reduces appetite and food noise.
• Improves blood-sugar control and insulin sensitivity.
• Supports major body-fat reduction by increasing metabolic efficiency.
What You Might Notice:
Reduced hunger within days. Smaller portions feel satisfying. Less food obsession. Faster fat loss
than expected.
Analogy:
Like a coach who makes you eat less, partition calories better, and open the fat tank all at once.
Stacks Well With:
• MOTS-c
• Tesamorelin
• NAD+ support; usually not with another strong incretin unless a licensed clinician is deliberately
managing overlap.
Evidence Lane:
Advanced human obesity trials, but still investigational/not generally approved for routine use.
Dosage Reference:
• Start: 1–2 mg once weekly
• Titrate up to: 6–12 mg weekly
• Cycle: 8–16 weeks
• Application: Subcutaneous injection
​
The Peptide Bible
The simple guide to therapeutic peptides
2) Tesamorelin
"Visceral Fat Foreman"
Best For:
Visceral fat reduction, body recomposition
Mechanism:
Tesamorelin is a GHRH analog. It tells the pituitary to release your own growth hormone pulse, which
then raises IGF-1 and shifts the body toward lipolysis — especially in visceral fat, the deeper
abdominal fat around organs.
Simple Explanation:
It doesn’t directly “melt fat”; it pulls the GH lever, and GH changes how the body mobilizes stored fat.
Benefits:
• Reduces visceral abdominal fat in its approved clinical use.
• Increases endogenous GH signaling and IGF-1.
• May improve body composition and metabolic markers.
What You Might Notice:
Gradual reduction in abdominal fat, improved body composition.
Analogy:
A foreman who targets the fat warehouse behind the organs, not just the fluff under the skin.
Stacks Well With:
• CJC no DAC
• Ipamorelin
• MOTS-C
Evidence Lane:
Approved for a specific indication, not general-purpose weight loss.
Dosage Reference:
• 1–2 mg daily
• Subcutaneous injection
• Often 8–12 week protocols
• Application: Subcutaneous injection
​
​
The Peptide Bible
The simple guide to therapeutic peptides
3) MOTS-c
"Mito Coach"
Best For:
Energy, metabolic health, insulin sensitivity
Mechanism:
MOTS-c is a mitochondria-derived peptide, which is cool because mitochondria are your cellular
power plants. It is linked to AMPK activation, better GLUT4-mediated glucose uptake, and a shift
toward using fuel more efficiently, especially during metabolic stress or exercise-like states.
Simple Explanation:
It helps cells act more like they’re in a disciplined, energy-efficient training camp instead of wasting
fuel.
Benefits:
• Supports mitochondrial efficiency and energy use.
• May improve insulin sensitivity and glucose handling.
• May enhance endurance and metabolic flexibility.
What You Might Notice:
Better energy, improved endurance, more stable blood sugar.
Analogy:
A conditioning coach teaching your cells to stop being sloppy with gasoline.
Stacks Well With:
• NAD+
• SS-31
• Retatrutide
• SLU-PP-332-type exercise mimetics.
Evidence Lane:
Preclinical work; human use is still early/experimental.
Dosage Reference:
• 5–10 mg 2–3x weekly
• Subcutaneous injection
• Cycle: 4–8 weeks
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
4) SLU-PP-322
"Exercise Mimetic"
Best For:
Fat oxidation, endurance signaling
Mechanism:
The published compounds in this family activate estrogen-related receptors (ERRs), especially
ERRα/γ depending on the molecule. ERRs are transcriptional regulators for mitochondrial
biogenesis, oxidative metabolism, fatty-acid oxidation, and endurance gene programs.
Simple Explanation:
They push cells toward the genetic program they use during aerobic training.
Benefits:
• More fat oxidation.
• More energy expenditure.
• Better endurance signatures in animal models.
What You Might Notice:
Increased stamina-like feel without actual training.
Analogy:
A fake gym membership for your mitochondria — but in mice, not proven in humans.
Stacks Well With:
• MOTS-c
• NAD+
• 5-amino-1MQ.
Evidence Lane:
I would present this to clients as preclinical only.
Dosage Reference:
• Research only — no established human dosage
The Peptide Bible
The simple guide to therapeutic peptides
5) 5-Amino-1MQ
"Fat-Storage Blocker"
Best For:
Fat loss support, metabolic efficiency
Mechanism:
5-Amino-1MQ inhibits NNMT (nicotinamide N-methyltransferase). NNMT sits in a crossroads
involving nicotinamide/NAD metabolism and methylation economy. In adipocytes, blocking NNMT
has been associated with less “easy fat storage” and a more metabolically active state.
Simple Explanation:
It interferes with one of the biochemical habits that makes fat cells comfortable hoarding energy.
Benefits:
• May reduce fat-cell tendency to store energy.
• Supports metabolic-efficiency and body-composition goals in preclinical work.
• Has interest for improving adipocyte metabolism.
What You Might Notice:
Leaner look over time, less fat regain tendency.
Analogy:
Taking away the warehouse manager’s permission slip to keep storing boxes.
Stacks Well With:
• Retatrutide
• MOTS-c
• NAD+ precursors/support.
Evidence Lane:
Strongest evidence is still preclinical.
Dosage Reference:
• 50–100 mg daily (research context)
• Cycle: 4–8 weeks
• Application: Oral / varies
The Peptide Bible
The simple guide to therapeutic peptides
6) Melanotan II
“Tan + Turn-On Switch”
Best For:
Tanning response, libido support
Mechanism:
Melanotan II is a nonselective melanocortin receptor agonist. At the skin level, it stimulates
melanocytes to produce more melanin; centrally, melanocortin signaling can also affect sexual
arousal pathways.
Simple Explanation:
It tells pigment cells to “darken the paint” and can also press part of the brain’s arousal circuitry.
Benefits:
• Increases melanin production for darker tanning response.
• May increase sexual arousal/libido through melanocortin signaling.
• May reduce UV exposure needed to tan, though safety concerns remain.
What You Might Notice:
Faster tanning, increased libido, possible nausea early
Analogy:
It tells pigment cells to “darken the paint” and can also press part of the brain’s arousal circuitry.
Stacks Well With:
• Generally better thought of as not a stack cornerstone because safety/quality is a major concern;
mechanistically it overlaps with PT-141.
Evidence Lane:
Not approved for cosmetic tanning
Dosage Reference:
• 250–500 mcg 2–3x weekly
• Application: Subcutaneous injection
The Peptide Bible The simple guide to therapeutic peptides
7) GHK-Cu
“Remodeling Signal”
Best For:
Skin, hair, regeneration
Mechanism:
GHK bound to copper acts like a repair and remodeling signal. It influences gene expression
involved in collagen, elastin, glycosaminoglycans, angiogenesis, antioxidant defense, and wound
remodeling.
Simple Explanation:
It tells old or damaged tissue, “stop laying down junk and start rebuilding better material.”
Benefits:
• Supports collagen production and skin repair.
• May improve wound healing and tissue regeneration.
• May help hair and scalp quality in cosmetic/regenerative settings.
What You Might Notice:
Improved skin quality over time
Analogy:
A renovation manager that brings copper tools to the job site and tells fibroblasts how to rebuild.
Stacks Well With:
• BPC-157
• TB-500
• Snap-8 for cosmetic protocols.
Evidence Lane:
Cosmetic/regenerative
Dosage Reference:
• Topical daily or 1–2 mg injectable 2–3x weekly
• Application: Topical or Subcutaneous injection
​
The Peptide Bible
The simple guide to therapeutic peptides
8) Glutathione
“Cellular Fire Extinguisher”
Best For:
Detox, recovery
Mechanism:
Glutathione is the cell’s major internal antioxidant buffer. It directly neutralizes reactive species
and serves as a cofactor for glutathione peroxidases and glutathione transferases, helping detoxify
peroxides and electrophilic stressors.
Simple Explanation:
It is one of the main chemicals your body uses to keep oxidative “sparks” from setting the place on
fire.
Benefits:
• Helps neutralize oxidative stress and free radicals.
• Supports liver detoxification pathways.
• May improve recovery from cellular stress and inflammation.
What You Might Notice:
Better recovery and reduced inflammation
Analogy:
A built-in fire extinguisher and hazmat crew.
Stacks Well With:
• NAD+ support
• SS-31
• GHK-Cu in skin/longevity programs.
Evidence Lane:
Well-established antioxidant
Dosage Reference:
• 600–1200 mg weekly
• Application: IV or Intramuscular injection
The Peptide Bible
The simple guide to therapeutic peptides
9) Snap-8
“Topical Soft-Focus Peptide”
Best For:
Wrinkle reduction
Mechanism:
Snap-8 is a cosmetic neurotransmitter-inhibiting peptide related to Argireline. It is designed to
interfere with the SNARE complex, the protein machinery used for neurotransmitter release at the
neuromuscular junction.
Simple Explanation:
It tries to reduce the signal that tells tiny facial muscles to contract, so expression lines can look
softer.
Benefits:
• May soften the appearance of expression lines and wrinkles.
• Helps reduce repeated micro-muscle contraction signals in skin.
• Supports smoother-looking skin in topical cosmetic use.
What You Might Notice:
Smoother looking skin
Analogy:
Dimming the electrical signal to the wrinkle-making muscles.
Stacks Well With:
• GHK-Cu
• hydration/barrier support
• signal peptides
Evidence Lane:
Cosmeceutical
Dosage Reference:
• Topical daily
• Application: Topical
The Peptide Bible
The simple guide to therapeutic peptides
10) KPV
“Inflammation Extinguisher”
Best For:
Inflammation, gut
Mechanism:
KPV is a short fragment related to α-MSH biology and has anti-inflammatory effects tied to
suppression of pathways like NF-κB and inflammatory cytokine signaling.
Simple Explanation:
Instead of stimulating growth, KPV mainly tells overreactive tissue, “calm down, stop over-firing.”
Benefits:
• Helps calm inflammatory signaling.
• May support gut comfort and mucosal healing.
• May benefit inflammatory skin conditions in topical or local use.
What You Might Notice:
Reduced inflammation and improved gut comfort
Analogy:
A bouncer who removes the loudest inflammatory troublemakers from the room.
Stacks Well With:
• BPC-157
• GHK-Cu
• LL-37 when there is a repair + inflammation theme.
Evidence Lane:
Emerging research
Dosage Reference:
• 250–500 mcg daily
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
11) BPC-157
"Wolverine"
Best For:
Injury recovery, gut health, tissue repair
Mechanism:
BPC-157 has been linked in preclinical work to angiogenesis, nitric-oxide pathway modulation,
inflammatory signaling control, and tissue-specific repair, especially for tendon, ligament, gut, and
nerve-related models.
Simple Explanation:
It seems to help the body organize a repair response — better blood supply, less inflammatory chaos,
more coordinated healing.
Benefits:
• May support tendon, ligament, and soft-tissue healing.
• Has strong interest for gut repair and mucosal support.
• May improve recovery by supporting blood-flow and repair signaling.
What You Might Notice:
Faster injury recovery. Reduced pain. Better mobility.
Analogy:
The site supervisor who gets blood vessels, fibroblasts, and repair crews all talking to each other.
Stacks Well With:
• TB-500
• KPV
• GHK-Cu
Caution:
Investigational, limited human data.
Dosage Reference:
• 250–500 mcg daily
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
12) TB-500
"Repair Traffic Controller"
Best For:
Recovery, mobility, soft-tissue repair
Mechanism:
The biologic rationale comes from thymosin beta-4, which binds actin and supports cell migration,
angiogenesis, progenitor-cell mobilization, and wound remodeling.
Simple Explanation:
After an injury, cells have to physically move to the job site; this pathway helps coordinate that movement.
Benefits:
• Supports cell migration involved in healing.
• May improve soft-tissue and muscle recovery.
• Has research interest in wound repair and flexibility/mobility recovery.
What You Might Notice:
Improved recovery speed. Better mobility.
Analogy:
A traffic controller opening lanes so repair crews can actually reach the construction zone.
Stacks Well With:
• BPC-157
• GHK-Cu
Mechanism Note:
Systemic vs localized compared to BPC-157.
Dosage Reference:
• 2–5 mg weekly
• Cycle: 4–8 weeks
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
13) LL-37
"Innate-Immune Spear"
Best For:
Immune response, antimicrobial, wound healing
Mechanism:
LL-37 is a human cathelicidin antimicrobial peptide. It can directly disrupt microbial membranes, but it also
does more than kill bugs — it influences macrophages, endothelial cells, angiogenesis, and wound repair
signaling.
Simple Explanation:
It’s part antibiotic, part immune communicator, part wound-healing signal.
Benefits:
• Has direct antimicrobial activity.
• Supports wound repair and immune signaling.
• May help the body respond to microbial threats more effectively.
What You Might Notice:
Improved immune response and faster healing.
Analogy:
A bodyguard who can fight intruders and also radio for cleanup and rebuilding.
Stacks Well With:
• Thymosin alpha-1
• KPV
• GHK-Cu depending on the clinical goal.
Caution:
Immune-active peptides can be double-edged; context matters.
Dosage Reference:
• 100–300 mcg daily
• Short cycles
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
14) Semax
"Brain Accelerator"
Best For:
Focus, cognition, mental performance
Mechanism:
Semax has been associated with increased BDNF and related neurotrophic signaling, including
TrkB/NGF-linked effects in preclinical work.
Simple Explanation:
It appears to support the brain’s “learning, repair, and adaptability” pathways, which is why people talk
about focus, clarity, and recovery after stress.
Benefits:
• Has direct antimicrobial activity.
• Supports wound repair and immune signaling.
• May help the body respond to microbial threats more effectively.
What You Might Notice:
Increased focus, clarity, and faster thinking.
Analogy:
Miracle-gro for synapses — not literally, but that’s the mental model.
Stacks Well With:
• Selank
• NAD+
• Pinealon.
Dosage Reference:
• 300–600 mcg daily
• Application: Intranasal
The Peptide Bible
The simple guide to therapeutic peptides
15) Selank
"Calm Focus"
Best For:
Anxiety, mood, stress
Mechanism:
Selank’s effects appear tied to GABAergic modulation and effects on enkephalin metabolism /
neurotransmission-related gene expression.
Simple Explanation:
It seems to calm the alarm system without making the brain stupid.
Benefits:
• May reduce anxiety without heavy sedation.
• Supports steadier mood and emotional regulation.
• Can improve calm, clear thinking under stress.
What You Might Notice:
Calmness, reduced anxiety, clear thinking.
Analogy:
Noise-canceling headphones for an anxious mind.
Stacks Well With:
• Semax
• DSIP; sometimes a nice educational pairing because Semax is “go” and Selank is “steady.”
Dosage Reference:
• 250–500 mcg daily
• Application: Intranasal
The Peptide Bible
The simple guide to therapeutic peptides
16) DSIP
"Sleep Gatekeeper"
Best For:
Sleep, recovery, nervous system regulation
Mechanism:
DSIP is historically described as a delta-sleep-inducing peptide, but the science is murkier than the
marketing. It has been studied in relation to sleep architecture, circadian physiology, stress, pain
threshold, and autonomic regulation, yet its endogenous biology remains partly unresolved.
Simple Explanation:
It is a sleep-regulation candidate peptide with intriguing data, but not one of the cleaner, modern evidence
stories.
Benefits:
• May improve sleep onset and sleep depth.
• May reduce stress-related nervous-system overactivity.
• May support recovery through better sleep quality.
What You Might Notice:
Improved sleep quality and relaxation.
Analogy:
A night-shift supervisor we know exists, but we still don’t fully understand his whole job description.
Stacks Well With:
• Selank
• Sleep-hygiene protocols; I would not oversell it.
Dosage Reference:
• 100–300 mcg before bed
• Subcutaneous injection
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
17) Pinealon
"Neuro-Archivist"
Best For:
Cognitive health, aging brain support
Mechanism:
Pinealon is usually discussed as the EDR peptide, with literature suggesting gene-expression regulation,
reduced neuronal apoptosis, dendritic-spine preservation, and neuroprotection in
aging/neurodegeneration models.
Simple Explanation:
It may help neurons preserve their structure and “instruction manual” under age-related stress.
Benefits:
• May support neuron survival during aging stress.
• Has research interest in memory and cognitive preservation.
• May help regulate gene expression tied to brain health.
What You Might Notice:
Improved cognitive clarity and resilience.
Analogy:
A librarian protecting the brain’s blueprints from damage and misfiling.
Stacks Well With:
• Semax
• Selank
• Epitalon
• NAD+
Dosage Reference:
• 5–10 mg daily
• Cycle: 10–20 days
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
18) Thymosin Alpha-1
"Immune Drill Sergeant"
Best For:
Immune support, resilience
Mechanism:
Thymosin alpha-1 acts as an immune modulator, affecting T cells, dendritic cells, cytokine signaling, and
toll-like-receptor-linked pathways.
Simple Explanation:
It helps wake up and organize immune troops rather than acting like a blunt stimulant.
Benefits:
• Supports T-cell and immune-system function.
• May improve immune coordination during stress or illness.
• Has research interest in infection and immune-dysregulation settings.
What You Might Notice:
Stronger immune resilience and recovery.
Analogy:
A drill sergeant who doesn’t create soldiers from nothing, but gets the unit communicating and moving
better.
Stacks Well With:
• Thymalin
• LL-37
• Glutathione support when the goal is resilience rather than raw inflammation.
Dosage Reference:
• 1–2 mg 2–3x weekly
• Subcutaneous injection
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
18) Thymosin Alpha-1
"Immune Drill Sergeant"
Best For:
Immune support, resilience
Mechanism:
Thymosin alpha-1 acts as an immune modulator, affecting T cells, dendritic cells, cytokine signaling, and
toll-like-receptor-linked pathways.
Simple Explanation:
It helps wake up and organize immune troops rather than acting like a blunt stimulant.
Benefits:
• Supports T-cell and immune-system function.
• May improve immune coordination during stress or illness.
• Has research interest in infection and immune-dysregulation settings.
What You Might Notice:
Stronger immune resilience and recovery.
Analogy:
A drill sergeant who doesn’t create soldiers from nothing, but gets the unit communicating and moving
better.
Stacks Well With:
• Thymalin
• LL-37
• Glutathione support when the goal is resilience rather than raw inflammation.
Dosage Reference:
• 1–2 mg 2–3x weekly
• Subcutaneous injection
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
19) Thymalin
"Thymus Reboot"
Best For:
Immune aging, longevity support
Mechanism:
Thymalin is a thymic peptide preparation associated with immune regulation, hematopoiesis support, and
age-related thymic function in a niche literature base.
Simple Explanation:
It’s meant to support the control center where T-cell education happens.
Benefits:
• May support thymus and immune-system aging.
• May improve immune-cell regulation in niche literature.
• Has longevity interest for immune resilience.
What You Might Notice:
Improved immune resilience over time.
Analogy:
Rebuilding the training academy where immune recruits learn friend from foe.
Stacks Well With:
• Thymosin alpha-1
• Epitalon
Dosage Reference:
• 10 mg daily
• Cycle: 10–20 days
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
20) Epitalon
"Telomere Caretaker"
Best For:
Longevity, cellular aging support
Mechanism:
Epitalon is an ultrashort pineal peptide studied for effects on telomerase activity, telomere maintenance,
pineal signaling, and gene expression.
Simple Explanation:
Chromosomes have protective end-caps called telomeres, and Epitalon is theorized to help maintain those
caps and support healthy cellular aging programs.
Benefits:
• Associated with telomerase and healthy-aging research.
• May support circadian and pineal-related regulation.
• May help cellular longevity signaling in niche literature.
What You Might Notice:
Subtle improvements in recovery, sleep rhythm, and longevity feel.
Analogy:
The little plastic tips on shoelaces that stop the laces from fraying.
Stacks Well With:
• Pinealon
• Thymalin
• NAD+
Dosage Reference:
• 5–10 mg daily
• Cycle: 10–20 days
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
21) NAD+
"Cellular Battery"
Best For:
Energy, recovery, longevity
Mechanism:
NAD+ is not just a supplement trend; it is a core coenzyme for redox reactions, ATP generation, and
enzymes like sirtuins, PARPs, and CD38-related pathways involved in DNA repair, stress response,
chromatin remodeling, and metabolic control.
Simple Explanation:
Cells need NAD+ to turn food into usable energy and to run several repair systems.
Benefits:
• Supports mitochondrial energy production.
• Helps fuel DNA repair and stress-response enzymes.
• May improve cellular resilience, recovery, and healthy aging.
What You Might Notice:
Improved energy, recovery, and mental clarity.
Analogy:
Both the battery and part of the wiring harness.
Stacks Well With:
• MOTS-c
• SS-31
• Glutathione support.
Dosage Reference:
• 250–500 mg IV weekly
• Or NAD+ precursor protocols
• Application: IV
The Peptide Bible
The simple guide to therapeutic peptides
22) SS-31 / Elamipretide
"Mitochondrial Shield"
Best For:
Mitochondrial health, fatigue
Mechanism:
SS-31 selectively interacts with cardiolipin in the inner mitochondrial membrane. Cardiolipin is important
for keeping the mitochondrial folds and electron-transport machinery organized.
Simple Explanation:
If mitochondria are the power plant, SS-31 helps stabilize the delicate inner walls and wiring so the
turbines waste less energy and throw fewer sparks.
Benefits:
• Protects mitochondrial membranes from oxidative damage.
• May improve cellular energy production efficiency.
• Has research interest in fatigue, muscle, and mitochondrial dysfunction.
What You Might Notice:
Improved energy and reduced fatigue.
Analogy:
An insulation wrap around the generator core.
Stacks Well With:
• NAD+
• MOTS-c
• Glutathione
Dosage Reference:
• 2–5 mg daily
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
23) PT-141 / Bremelanotide
"Desire Switch"
Best For:
Libido, sexual function
Mechanism:
PT-141 is a melanocortin receptor agonist; clinical bremelanotide acts through central melanocortin
pathways, especially MC4R-linked CNS signaling, to improve sexual desire, though the full translation
from receptor binding to clinical effect is not fully nailed down.
Simple Explanation:
It works more through the brain’s arousal circuitry than through direct nitric-oxide vasodilation like
sildenafil.
Benefits:
• Improves sexual desire in its approved indication.
• May enhance arousal through central nervous system pathways.
• Works through brain desire signaling rather than simple blood-flow effects.
What You Might Notice:
Increased libido and arousal.
Analogy:
Turning on the brain’s “want to” signal, not just the plumbing.
Stacks Well With:
• Kisspeptin in concept, but this is exactly where you need clinician oversight.
Dosage Reference:
• 1–2 mg as needed
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
24) HCG
"LH Stand-In"
Best For:
Testosterone support, fertility
Mechanism:
HCG acts very similarly to luteinizing hormone (LH) at the LH/hCG receptor on Leydig cells. That receptor
drives cAMP signaling, cholesterol transport into mitochondria, and the steroidogenesis cascade that
makes testosterone.
Simple Explanation:
It’s a stand-in signal that tells the testes, “make more steroid hormone.”
Benefits:
• Stimulates the testes to produce testosterone.
• Helps support fertility in appropriate medical use.
• May help preserve testicular function during hormone suppression.
What You Might Notice:
Improved hormone levels and fertility markers.
Analogy:
Sending a backup foreman when the original LH signal is too low or shut down.
Stacks Well With:
• Kisspeptin conceptually, sometimes testosterone-preservation strategies — but that is firmly a
medical-management lane.
Dosage Reference:
• 250–500 IU 2–3x weekly
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
25) Kisspeptin-10
"HPG Gatekeeper"
Best For:
Hormone regulation, fertility
Mechanism:
Kisspeptin is one of the most upstream regulators of the reproductive axis. It stimulates hypothalamic
neurons to release GnRH, which then drives LH/FSH release from the pituitary, which then influences
gonadal hormone production.
Simple Explanation:
It is the signal that tells the whole fertility/testosterone orchestra when to start playing.
Benefits:
• Stimulates the reproductive hormone cascade upstream.
• May support LH/FSH release and downstream testosterone signaling.
• Has research interest in fertility and hormone-axis restoration.
What You Might Notice:
Improved hormone signaling and libido.
Analogy:
The conductor raising the baton before the music begins.
Stacks Well With:
• HCG in theory only under supervision
• PT-141 if the goal is broader sexual-health support, but again that’s advanced medicine, not casual
stacking.
Dosage Reference:
• 100–200 mcg daily
• Short cycles
• Application: Subcutaneous injection
The Peptide Bible
The simple guide to therapeutic peptides
26) HGH / Somatropin
"Master Builder Hormone"
Best For:
Growth, recovery, body composition
Mechanism:
Growth hormone binds the growth-hormone receptor, triggering pathways including JAK2/STAT5, and
also indirectly raises IGF-1, especially from the liver. The net result is more support for protein synthesis,
tissue repair, growth, lipolysis, and altered carbohydrate metabolism.
Simple Explanation:
It is a high-level “build and mobilize” hormone — powerful, but not subtle.
Benefits:
• Tissue repair, lean-mass support, growth-hormone deficiency treatment.
What You Might Notice:
Improved recovery, muscle growth, fat loss.
Analogy:
The general contractor who can expand the workforce and order more raw materials, but also raises the
electric bill.
Stacks Well With:
• CJC/IPA frameworks are conceptually redundant with exogenous GH, so if used together it requires
careful medical intent; otherwise pick one strategy.
Dosage Reference:
• 1–3 IU daily
• Medical supervision required
• Application: Subcutaneous injection
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This is a great place to tell users a story about your website and let them know more about what you offer. You may want to share information about your company's background, your team, or the services you provide. Be sure to keep the tone and voice consistent throughout the site so users become familiar with your brand.
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This is a great place to tell users a story about your website and let them know more about what you offer. You may want to share information about your company's background, your team, or the services you provide. Be sure to keep the tone and voice consistent throughout the site so users become familiar with your brand.
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This is a great place to tell users a story about your website and let them know more about what you offer. You may want to share information about your company's background, your team, or the services you provide. Be sure to keep the tone and voice consistent throughout the site so users become familiar with your brand.
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This is a great place to tell users a story about your website and let them know more about what you offer. You may want to share information about your company's background, your team, or the services you provide. Be sure to keep the tone and voice consistent throughout the site so users become familiar with your brand.