Which Peptides Are Legal to Compound in 2026? Full FDA Status Guide
Published May 11, 2026 • Newtropin Editorial Team • Last Updated: May 2026
Navigating the regulatory landscape for legal peptides in 2026 for compounding can be confusing — but it does not have to be. With the FDA’s major April 15, 2026 update to the 503A bulk drug substances document, the status of dozens of popular peptides and therapeutic compounds has shifted. Some are moving toward greater access; others remain under evaluation. This guide is your definitive reference — a complete, regularly updated table of every relevant peptide and its current FDA category status, what each category means for patient access, and what is coming next. Bookmark this page and check back monthly for the latest updates.
Last Updated: May 2026 • Based on the FDA 503A Bulk Drug Substances document updated April 15, 2026. This page is updated monthly to reflect the latest regulatory changes.
Understanding the Three Categories
The FDA organizes nominated bulk drug substances into three categories that determine whether compounding pharmacies can legally use them. Understanding these categories is the key to knowing whether your peptide is accessible through legitimate pharmacy channels:
Category Name What It Means for Patients
1 Under Evaluation Generally available for compounding while evaluation is ongoing. Your pharmacy can likely prepare these with a valid prescription.
2 Significant Safety Concerns Compounding is restricted or effectively blocked. Pharmacies generally cannot prepare these substances.
3 Nominated Without Adequate Support Insufficient data submitted. Not approved for compounding until additional evidence is provided.
Peptides Being Removed from Category 2 → PCAC Review
These peptides were previously in Category 2 (safety concerns) and are now being removed and scheduled for PCAC (Pharmacy Compounding Advisory Committee) review. This is a major positive development that signals the FDA is reconsidering these peptides for legal compounding status:
Peptide Forms PCAC Meeting Date Primary Use
BPC-157 Acetate & Free Base July 23, 2026 Gut healing, tissue repair, anti-inflammatory
KPV Acetate & Free Base July 23, 2026 Anti-inflammatory, gut immune support
MOTs-C Acetate & Free Base July 23, 2026 Metabolic optimization, exercise mimetic
TB-500 (LKKTETQ) Acetate & Free Base July 23, 2026 Tissue regeneration, wound healing
Emideltide (DSIP) Acetate & Free Base July 24, 2026 Sleep regulation, stress reduction
Epitalon Acetate & Free Base July 24, 2026 Anti-aging, telomere lengthening
Semax Acetate & Free Base July 24, 2026 Cognitive enhancement, neuroprotection
GHK-Cu (injectable) Injectable route Before Feb 2027 Anti-aging, skin rejuvenation, wound healing
Cathelicidin LL-37 — Before Feb 2027 Antimicrobial, immune defense
Dihexa Acetate — Before Feb 2027 Cognitive enhancement, neuroregeneration
PEG-MGF — Before Feb 2027 Muscle growth, recovery
Melanotan II — Before Feb 2027 Skin tanning, sexual function
Removals from Category 1
GHK-Cu (except for injectable routes) is being removed from Category 1, with PCAC consultation scheduled before February 2027. This means that topical and other non-injectable forms of GHK-Cu are transitioning out of the general evaluation category and into the PCAC review pipeline for a definitive determination on compounding status. For more on GHK-Cu’s unique dual-track regulatory situation, read our dedicated GHK-Cu FDA status guide.
Category 1 Peptides: Currently Under Evaluation
These substances remain in Category 1 (Under Evaluation) and are generally available through compounding pharmacies while the FDA continues its assessment. This list includes many of the most popular peptides in clinical use today:
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Substance Category Common Uses
7-Keto DHEA 1 Metabolism, weight management, thermogenesis
Acetyl L-Carnitine 1 Energy, cognitive support, fat metabolism
Alpha Lipoic Acid 1 Antioxidant, blood sugar support, nerve health
Enclomiphene Citrate 1 Testosterone restoration, hormonal balance
Glutathione 1 Master antioxidant, detoxification, immune support
Ibutamoren (MK-677) 1 Growth hormone secretagogue, muscle, sleep
Ipamorelin 1 Growth hormone release, anti-aging, recovery
Kisspeptin 10 1 Reproductive hormone regulation
Low Dose Naltrexone (LDN) 1 Immune modulation, autoimmune conditions, chronic pain
NAD+ 1 Cellular energy, anti-aging, neuroprotection
Nicotinamide Mononucleotide (NMN) 1 NAD+ precursor, longevity, energy metabolism
Oxytocin 1 Social bonding, anxiety, mood regulation
Pentadecapeptide BPC-157 1 Gut healing, tissue repair (under evaluation)
PT-141 (Bremelanotide) 1 Sexual dysfunction treatment
Selank 1 Anxiolytic, cognitive enhancement, immune modulation
Sermorelin 1 Growth hormone releasing hormone analog
Thymosin Alpha-1 1 Immune modulation, chronic infections, hepatitis
Note: This is not an exhaustive list of all Category 1 substances. The full FDA 503A document contains additional substances across therapeutic categories. We focus here on peptides and compounds most relevant to the newtropin.com audience. For growth hormone-related peptides, see our CJC-1295 + Ipamorelin guide.
What Each Category Means for Your Access
Category 1 — Under Evaluation
If the peptide you use is in Category 1, access is generally maintained through compounding pharmacies with a valid prescription. However, “under evaluation” means the FDA has not made a final determination. Patients should work with their prescriber and pharmacy to ensure continuous access and have contingency plans in case a substance’s category changes during the review process.
Category 2 → PCAC Review (Transitioning)
Peptides being removed from Category 2 are in a transitional state. They are no longer classified as safety concerns, but they have not yet been officially approved for 503A compounding. Access during this transition depends on your state’s regulations and your pharmacy’s policies. The PCAC meetings in July 2026 and before February 2027 will produce recommendations that guide the FDA’s final decisions. This is the most dynamic category right now — and the one generating the most patient interest.
Category 3 — Insufficient Support
If a substance is in Category 3, it generally cannot be compounded. Additional data must be submitted to the FDA to advance it to Category 1 or the PCAC review stage. Patient advocacy groups and industry stakeholders can help by submitting supporting evidence for substances in this category.
Key Dates to Watch
Date Event Peptides Affected
July 23, 2026 PCAC Meeting Day 1 BPC-157, KPV, MOTs-C, TB-500
July 24, 2026 PCAC Meeting Day 2 Emideltide (DSIP), Epitalon, Semax
Before Feb 2027 Additional PCAC Session(s) GHK-Cu, LL-37, Dihexa, PEG-MGF, Melanotan II
How to Stay Updated
The FDA peptide regulatory landscape is dynamic. New PCAC meetings, rule changes, and category shifts can occur throughout the year. To stay current:
Bookmark this page — we update it monthly with the latest category statuses and any new FDA announcements Subscribe to Newtropin updates — get regulatory news and analysis delivered to your inbox before anyone else Follow the FDA’s 503A document — the official source for category assignments at fda.gov Talk to your prescriber regularly — they can provide guidance on how changes affect your specific protocol Visit our peptide guides — explore our BPC-157 guide, our peptide weight loss guide, and other resources for in-depth information on specific peptides
Conclusion: Your Complete Peptide Status Reference
This page is designed to be the single most useful resource for understanding which peptides are legal to compound in 2026 and beyond. As the FDA processes PCAC recommendations from the July 2026 meetings and the early 2027 sessions, we will update the tables above to reflect every change. Stay ahead of the curve by bookmarking this page, subscribing to newtropin.com updates, and sharing this resource with your healthcare provider and fellow peptide patients.
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Disclaimer: This content is for informational purposes only and does not constitute legal or medical advice. Regulatory status may change. Always consult a qualified healthcare provider and check current FDA guidance before starting any peptide therapy.