Jason Poston's peptide content: what the science actually supports

What did @jasonposton_ actually say?

Poston's core argument is that his current physique, built on "doctor prescribed peptides" and TRT, is comparable to his competitive bodybuilding years when he was using anabolic steroids including trenbolone. He frames this as a sustainability story: the steroid look "is not sustainable" for longevity, while his current protocol, which he says includes Anavar alongside TRT, gives him a physique he loves with great bloodwork. He also takes a shot at Liver King, pointing out the $11,000 monthly supplement spend while implying his own medically supervised approach is the more honest path.

Worth noting: he is not claiming to be natural. He explicitly lists Anavar and TRT on top of the peptides. That transparency matters, and it changes how we should read the "clinical grade" framing he's leaning into throughout.

Does the science back this up?

The short answer is: partially, and with important caveats. TRT at physiological doses is one of the better-studied interventions in men's health, with documented benefits for body composition, mood, and metabolic markers when properly managed. Peptides are a different story. The evidence base is thin, fragmented, and mostly preclinical.

Growth hormone secretagogues like CJC-1295 and ipamorelin, which are common in these protocols, have shown modest effects on GH pulse amplitude in small trials (Ionescu and Frohman, 2006, Journal of Clinical Endocrinology and Metabolism), but long-term human data on body composition outcomes is sparse. BPC-157 has compelling rodent data on tissue repair but zero completed human RCTs as of 2024. GHK-Cu shows interesting wound-healing properties in vitro but human clinical evidence is limited. The honest summary is that most peptides being sold as longevity tools are operating well ahead of their evidence base.

Anavar (oxandrolone) is a Schedule III anabolic steroid. Calling a stack that includes Anavar a "clinical grade" protocol is a stretch. It has legitimate medical uses, but the framing softens what is still a steroid cycle.

What did they get wrong (or right)?

He gets credit for being upfront. Admitting trenbolone use, naming Anavar, disclosing TRT, and calling out Liver King's dishonesty are all moves in the right direction for a space full of bad-faith actors. That transparency is genuinely uncommon in fitness content.

Where he goes wrong is the implicit equivalence between "clinical grade" and safe or evidence-based. Anavar is not a peptide. Including it in the same breath as peptide therapy and then saying "my bloodwork is great" conflates two very different things. Short-term bloodwork looking clean does not rule out long-term consequences of ongoing anabolic steroid use, including cardiovascular remodeling. A 2017 study by Baggish et al. in Circulation found that long-term anabolic steroid users showed significantly impaired left ventricular function compared to non-users, even after cessation.

The "sustainable for longevity" claim applied to a protocol that still includes an oral anabolic steroid deserves scrutiny. He may look and feel great now. That does not make the protocol low-risk over a decade.

What should you actually know?

TRT under physician supervision with regular bloodwork is a legitimate, well-studied intervention for men with documented hypogonadism. That part of his protocol has real clinical backing. Peptide therapy is a more complicated picture: some peptides have real research interest behind them, but most are being used in clinical practice significantly ahead of human trial data.

Anavar is a controlled substance in the US. Compounded or prescribed oxandrolone exists for specific medical indications like muscle-wasting conditions, but using it as part of a physique optimization protocol is off-label and carries real risks that are not erased by a recent clean CBC. Cardiac, hepatic, and endocrine side effects are dose and duration dependent, and many take years to surface.

If you are considering any peptide protocol, the most useful thing Poston's video demonstrates is the value of physician oversight and regular labs. That part is real. But "my bloodwork is great" from someone seven years post-competitive bodybuilding, still on Anavar and TRT, is not a safety guarantee you should borrow for yourself.