Ipamorelin vs MK-677: what each one is and what studies show
Ipamorelin vs MK-677: one is a peptide, one is not. Both raise growth hormone. See the human studies, FDA records and sports bans for each.
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About Dana
Dana Whitcomb
Dana likes to slow down when a peptide claim sounds certain. She looks at the exact product, who took part in a study, and what researchers measured. She writes for readers who want a clear answer and a fair account of what remains unknown.
Read the postsBlog posts by Dana Whitcomb
Are peptides legal in the military?
Are peptides legal in the military? Often no. BPC-157, TB-500 and other peptides are on the DoD prohibited list. See its peptide rows and prescription rules.
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Which peptides are FDA-approved? A product-by-product directory.
A limited directory of FDA-approved peptide medicines. Each entry names the brand, application, dosage form, route, and approved use. It does not treat an ingredient name as proof of approval.
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Is Ozempic a peptide?
Yes. Ozempic contains semaglutide, a modified peptide. See what its FDA labels say about the chain, the added fatty part and the tablet form.
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Bioactive peptides from food: what the milk peptide studies show
Learn what bioactive peptides from food are, how the milk peptides VPP and IPP were studied, and what trials and regulators found about blood pressure.
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Mitochondrial peptides: humanin, MOTS-c and SS-31 explained
Learn the two meanings of mitochondrial peptides, what humanin, MOTS-c and SS-31 are, and what studies in cells, animals and people show.
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GIP: what gastric inhibitory peptide does in the body
Learn what GIP (gastric inhibitory peptide) is, why it has two names, how it helps release insulin after meals, and how tirzepatide differs from it.
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Argireline: what wrinkle studies show
Learn what Argireline is, what small wrinkle trials measured, and why a laboratory skin-penetration result cannot predict every serum's effects.
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Matrixyl peptides: names, wrinkle studies and limits
Compare Matrixyl, Matrixyl 3000 and synthe'6 ingredients. See what two human wrinkle studies found and check whether a cream claim matches them.
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Antimicrobial peptides: what they do and what studies show
What are antimicrobial peptides? Learn about human defensins, LL-37 and sweat peptides, and how to read laboratory findings without assuming treatment benefits.
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IGF-1 LR3: structure and research limits
What is IGF-1 LR3? Compare its structure with natural IGF-1 and see what original cell and animal studies can establish.
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Is tesofensine a peptide?
Is tesofensine a peptide? Check its recorded structure, learn what reuptake inhibitor means, and separate a substance identifier from drug approval.
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How are peptides made? Cells and laboratory methods
How are peptides made? Compare cell assembly, chemical synthesis and recombinant production. Learn why a method name cannot prove product quality.
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KLOW peptide: what is in the GLOW and KLOW blends, and what the evidence shows
KLOW and GLOW are seller names for mixed peptide vials. See what each usually contains, what FDA found for each ingredient, and why no study of either blend in people was found.
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Semaglutide vs. tirzepatide: weight loss, risks, and product differences
Compare semaglutide and tirzepatide. See what two direct studies found, how FDA-approved products differ, and which risks and evidence limits matter.
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Cell penetrating peptides: what cell entry proves
Cell penetrating peptide tests can show attachment, trapped cargo, or delivery into cell fluid. Learn what each result proves and where the evidence stops.
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Is glucagon a peptide?
Yes. Glucagon is a peptide hormone that helps raise blood sugar. Learn its normal role and how it differs from proglucagon and GLP-1.
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Is somatostatin a peptide?
Yes. Human somatostatin has 14- and 28-amino-acid peptide forms. Compare both with their 116-unit precursor and with octreotide.
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Is ghrelin a peptide?
Yes. Human ghrelin has 28- and 27-unit peptide forms. See how its 117-unit precursor and a fatty-acid change affect the names in source records.
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Is calcitonin a peptide?
Yes. Human calcitonin is a 32-unit peptide hormone. Learn why its precursor has 141 units and how calcitonin differs from procalcitonin and CGRP.
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Is vasopressin a peptide?
Yes. Human vasopressin is a nine-unit peptide hormone. See why its precursor has 164 units and how vasopressin differs from copeptin and oxytocin.
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Is insulin a peptide?
Yes. Human insulin is a peptide hormone also described as a small protein. See how its two chains differ from proinsulin and C-peptide.
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Is GLP-1 a peptide?
Yes, GLP-1 is a peptide hormone. Compare its 30- and 31-unit forms with its precursor, semaglutide, and a nonpeptide receptor agonist.
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Is collagen a peptide?
Collagen is a protein made of peptide-linked chains. Learn how intact collagen, gelatin, and collagen peptides differ, and what each name can tell you.
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GHRP peptides: class, evidence, and limits
Learn what GHRP peptides are, how GHRP-6 differs from other members and GHRH, and what short human studies cannot prove.
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How GLP-1 medicines work for weight loss
How does GLP-1 work for weight loss? Learn about appetite, food intake, stomach emptying, and the limits of human studies.
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Is carnosine a peptide?
Is carnosine a peptide? Learn how its two amino-acid units determine its chemical class and what that class cannot show.
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Is creatine a peptide?
Is creatine a peptide? Learn why creatine is an amino-acid derivative rather than an amino-acid chain.
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Is glutathione a peptide?
Is glutathione a peptide? Learn why glutathione is a tripeptide, how its unusual bond works, and what chemical class cannot tell you.
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Is melatonin a peptide?
Is melatonin a peptide? Learn why melatonin is an indoleamine rather than an amino-acid chain.
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Is MK-677 a peptide?
Is MK-677 a peptide? Learn why ibutamoren is a nonpeptide, what its receptor studies show, and where FDA status and safety evidence stop.
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Is NAD a peptide?
Is NAD a peptide? Learn why NAD is a dinucleotide coenzyme and how NAD+, NADH, NMN, and NR differ from peptides.
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Is oxytocin a peptide?
Is oxytocin a peptide? Learn why oxytocin is a cyclic nine-amino-acid peptide and what that class cannot show.
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Is SLU-PP-332 a peptide?
Is SLU-PP-332 a peptide? Learn what its chemical structure shows and why a catalog label cannot establish chemical class.
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Is taurine a peptide?
Is taurine a peptide? Learn why taurine is an amino sulfonic acid rather than an amino-acid chain.
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Oral peptides: do peptide pills work?
Most oral peptides break down when swallowed. See which FDA-approved peptide pills are built to work, what their studies measured, and how to check a peptide pill claim.
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KPV peptide: what it is, what the studies tested, and where FDA review stands
KPV peptide is a three-amino-acid piece of alpha-MSH. See what cell and animal studies tested, plus FDA's 2026 review and committee vote.
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Are peptides legal? What U.S. law and the FDA actually say
No single legal status covers peptides. See which peptide medicines are approved, which can be compounded, what FDA Category 2 means, and where the rules stop.
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Peptides for skin: do creams and serums work?
Learn what human studies show about peptide skin creams, collagen supplements, afamelanotide, GHK-Cu, and injection claims. See where the evidence stops.
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Peptides for weight loss: results, medicines, and risks
Learn which peptide medicines help with weight loss, what a direct study found, and which risks matter. Compare approved medicines with other products.
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What are peptides?
What peptides are, what they may do, safety limits, uses, and product details.
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Peptide vs protein: what is the real difference?
Peptide vs protein: compare amino acids, chain length, folding, and the limits of chemical and U.S. regulatory definitions.
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Peptide purity testing: what a 99% result can show
Learn what peptide purity means, what a 99% result can show, and why one lab report cannot prove strength, sterility, safety, or FDA approval.
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Peptide therapy: what the evidence and product labels show
Peptide therapy is a broad term. Learn how to check approval, evidence, product identity, and safety without treating every peptide product as the same.
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Peptides and steroids: what is different, what is not
A plain-language comparison of peptides and steroids. It covers chemistry, how they send signals, approved medicines, product quality, safety evidence, and the 2026 World Anti-Doping Agency list.
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Retatrutide cost and availability: why there is no approved retail product
No retatrutide product is FDA-approved or launched, and no legitimate U.S. retail price exists. The sections below separate research access, expanded access, research sales, compounded claims, and speculation.
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Are peptide injections safe? What the product and evidence show.
Peptide injections do not have one safety answer. Learn how approved, compounded, research-labeled, and counterfeit products differ in evidence, quality, and risk.
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BPC-157 side effects: what human studies do and do not show
A plain-language guide to BPC-157 safety. Current reports do not show which side effects occur or how often. It explains the small human record, FDA concerns, product risks, and what remains unknown.
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How much does peptide therapy cost? A simple clinic cost guide.
Compare peptide clinic prices by product, prescriber, pharmacy, monitoring, insurance, and cancellation terms.
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Peptides for hair growth: GHK-Cu, copper peptides, and the evidence
Learn what human studies show about copper-peptide hair products. See why early lab work, small mixture studies, and injection claims do not prove hair growth.
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Peptides for muscle growth: human evidence
Do peptides build muscle? Read what human studies found for CJC-1295, ipamorelin, tesamorelin, BPC-157, TB-500, PEG-MGF, and collagen peptides.
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Evidence for one product does not automatically apply to another.
A peptide name or lab report does not make two products the same. Seven product details decide whether a study result applies to a product.
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How to fact-check peptide information.
Use five steps to check a statement about a peptide against studies and official records.
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Animal results do not show that a peptide works in people.
Peptide marketing often cites cell or animal studies. Learn why those results may not apply to people and what human studies can show.
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Compounded drugs are not FDA-approved products.
Compounded drugs are not FDA-approved and are not reviewed for safety, effectiveness, or quality before marketing. Learn what approval covers, what compounding is for, and how to check a product.
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