Peptides 101 — what they are, what they aren't, and what to ask
Peptide therapy is everywhere right now. Here's a non-hype primer on what's actually in the syringe, what the evidence supports, and the questions to ask before you start.
· By MedSpot Editorial · 1 min read
Peptide therapy has gone from underground to mainstream in less than two years. The marketing is loud; the data is mixed. Here's the version a clinician would tell you.
What's actually in the bottle
A peptide is a short chain of amino acids — same building blocks as proteins, just smaller. The most common ones in aesthetic and wellness practice (BPC-157, GHK-Cu, semaglutide, tirzepatide) all work through different mechanisms.
What the evidence supports
- Semaglutide / tirzepatide — solid clinical trials for weight management and glycemic control.
- GHK-Cu (copper peptides) — small studies on skin and wound healing.
- BPC-157 — anecdotal in humans; promising in rats; the FDA hasn't blessed it.
Treat anything that promises weight loss, muscle growth, AND skin tightening in one bottle as marketing.
What to ask before you start
- Where is this compounded? You want a 503A or 503B pharmacy, not an unregulated source.
- Who is monitoring? A clinician should review labs at baseline and every 3 months.
- What's the off-ramp? "Stop one day, gain it back the next" plans are a red flag.
A good med spa will walk you through the same questions and write you a transparent plan you can take to a second opinion.