Peptides: What I'm Actually Looking Into (and Why I'm Not Rushing to a Verdict)
Peptides aren't new. They've been part of mainstream medical research for over a century. What is new is the explosion of interest around them, driven largely by the success of weight-loss medications, which has sparked a wider "peptide craze" touching everything from recovery and skin health to longevity.
Like most trends that arrive with big claims, expensive protocols, and more confidence than evidence, my instinct is to slow down rather than jump on board. So instead of dismissing peptides or endorsing them, I've started properly looking at what the research actually says.
What Are Peptides, Really?
Peptides are short chains of amino acids, the building blocks of proteins. Many naturally occurring peptides act as signalling molecules in the body, helping cells communicate and influencing processes like repair, appetite, metabolism, and hormone activity.
(Getting enough quality protein and amino acids from food remains foundational, whatever the research on peptide supplements eventually shows. This week's [Grilled Chicken & Peach Skewers] is a good example of a simple, protein-rich meal.)
But "peptide" is an umbrella term, not a guarantee of quality or safety. Different peptides have distinct proposed uses, evidence bases, risks, and regulatory statuses. Lumping them all together is part of what makes this topic so easy to oversimplify.
One quick clarification: when people hear "peptides," they often think of GLP-1 medications like Ozempic or Mounjaro. (Read Weight Loss Injections to learn more about these medications.) While those are technically peptide drugs, this isn't about them. This is about the many other peptides that are increasingly showing up in conversations about recovery, performance, and longevity.
The Peptides People Are Talking About
There isn't one peptide; there are dozens, each researched for different purposes with very different levels of evidence behind them:
BPC-157 - tendon, ligament, and gut repair
TB-500 - muscle recovery and tissue repair
GHK-Cu - skin health, collagen, and wound healing
KPV - gut inflammation and autoimmune conditions
Thymosin Alpha-1 - immune function
CJC-1295 / Ipamorelin - recovery, growth hormone signalling, body composition
AOD-9604 - fat metabolism and weight management
MOTS-c - metabolic health and exercise performance
Epitalon - healthy ageing and longevity research
Important caveat: these are the areas each peptide is commonly researched or promoted for, not established treatments. The quality and quantity of evidence behind each one varies considerably.
Why the Question Isn't "Do They Work?"
When one category gets promoted as the answer to a huge range of unrelated problems, that's usually a signal to slow down, not speed up. The real question isn't simply whether peptides work. It's more specific than that: which peptide, for whom, for what purpose, at what dose, from what source, and backed by what quality of evidence?
What I'm Actually Digging Into
Rather than offer a neat conclusion before I've earned one, I'm currently working through an in-depth investigation, including a dedicated course on the more widely discussed peptides, conversations with practitioners experienced in this area, and a close look at the research itself. Specifically, I'm looking at:
Evidence - which claims are backed by meaningful human research, rather than theory, animal studies, or anecdotes
Quality - how someone can actually know what they're receiving, and whether it's been produced and stored properly
Safety - known side effects, contraindications, and longer-term unknowns
Oversight - which peptides should only ever be considered under proper medical supervision
Relevance - whether a peptide is addressing a genuine need, or distracting from the foundations that still matter most
A Word of Caution
Something can be scientifically interesting and still not be appropriate for widespread, unsupervised use. A genuinely helpful intervention can also become unhelpful when it's poorly sourced, used without proper context, or sold as a shortcut.
My view on the fundamentals hasn't changed. Sleep, food quality, movement, stress, gut health, and metabolic health remain the foundation. No advanced intervention can compensate indefinitely for foundations that are being ignored.
That said, I'm open to the possibility that certain peptides, used carefully and in the right context, may eventually have a valuable place. That's what I intend to find out, properly, before drawing any conclusions.
In Summary
Peptides are short amino acid chains that act as signalling molecules in the body, but "peptide" covers a huge range of substances with very different evidence bases
GLP-1 medications like Ozempic are technically peptides too, but aren't the focus of this investigation
Popular peptides are researched for everything from tissue repair to longevity, but most aren't established treatments
The right question isn't whether peptides work in general, but which one, for what purpose, and with what evidence
I'm properly investigating the evidence, quality, safety, and oversight involved before forming a view
Following Along
I'm documenting this investigation as it happens, sharing what I find, where the evidence looks genuinely promising, and where the claims are running ahead of the science. If you'd like to follow the research as it unfolds, you can catch the series on Instagram.
If you'd like a deeper look at what your blood results might really be telling you, book a free 15-minute discovery call with me today.
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