What Is Peptide Therapy? A Bay Area Guide to What's Legitimate and What's Not

Peptide Therapy Is Not One Thing

"Peptide therapy" is a broad umbrella term, and treating it as a single, uniform category is where most confusion — and most risk — comes from. Peptides are short chains of amino acids that act as signaling molecules in the body, and a huge range of compounds fall under that chemical definition, from FDA-approved medications to substances explicitly flagged as unsafe to compound. Before considering any peptide treatment, the single most useful question is: which specific compound, by exact name?

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Is GLP-1 Weight Loss Medication "Peptide Therapy" Too?

Technically, yes — tirzepatide and semaglutide are peptides, which makes GLP-1 weight loss medication a form of peptide therapy. But most people searching for "peptide therapy" are asking about a different category: compounds marketed for anti-aging, recovery, or energy rather than weight loss specifically. If weight loss is your actual goal, our dedicated coverage on tirzepatide vs. semaglutide, protecting muscle mass on GLP-1 medication, and what a legitimate GLP-1 program looks like is the more directly useful starting point.

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BPC-157 and TB-500: A Genuinely Unsettled, Fast-Moving Status

This is the most important section on this page, and also the one most likely to be out of date by the time you read it — that's worth saying plainly rather than pretending otherwise. BPC-157 and TB-500 are commonly marketed for injury recovery, gut health, and tendon or ligament healing. BPC-157 was previously restricted from legal compounding over FDA safety concerns. As of 2026, that status is under active federal reconsideration: a compounding advisory committee voted in favor of allowing it back onto the legal compounding list, as part of a broader push to move several previously restricted peptides back into a compoundable category — but the FDA's own formal position and that recommendation don't fully agree as of this writing. TB-500 has generally been treated with the same caution, commonly sold online as a "research chemical" not intended for human use.

Given how quickly this is moving, the right move isn't to trust a fixed claim about either compound's legal status — including this article's. Ask a licensed compounding pharmacy directly for the current status before assuming either way, and treat any provider who can't or won't engage with the question directly as a red flag.

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Peptides With Clearer Regulatory Footing

Not every peptide carries the same level of uncertainty. Some have clearer, more stable legal and clinical status.

Compound	Status	Common Use
Tesamorelin (Egrifta)	FDA-approved for a specific indication (HIV-associated lipodystrophy); used off-label elsewhere	Reducing abdominal fat, sometimes anti-aging
Sermorelin	Currently categorized to allow legal compounding by licensed pharmacies; not marketed as its own FDA-approved product	Growth hormone stimulation, anti-aging
NAD+	A coenzyme, not technically a peptide — commonly offered on the same clinic menus	Energy, cellular health

Even within this clearer tier, "off-label" and "legally compoundable" aren't the same as "FDA-approved for this specific use" — ask your provider to be specific about what's approved versus what's being used off-label, and why they consider it appropriate for you.

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What to Ask Before Booking Any Peptide Treatment

Ask three things, in this order: which specific compound is being offered — by exact name, not the umbrella term "peptide therapy"; is it sourced from a licensed pharmacy rather than a research-chemical supplier; and does the program include actual medical evaluation and monitoring, not just a sale. A legitimate provider will answer all three specifically and without hesitation. One that stays vague on which compound you're actually receiving is not one to trust with an injectable substance.