evidence-led peptide journalism. not medical advice.
reptides · 13 min read · part of lifetime access ($100 once)

wait, so is it tb-500 or thymosin beta-4?.

one name, two molecules, and a mass spec that settles it. why the real protein grades A and stays there..

own it forever · $100 →
already bought · sign in →

$100 once unlocks all paid features: every paid brief, Ask, the journal, and future paid updates, for life.

"i kept reading COAs for a healing blend that said TB-500 on the label. the lab kept writing thymosin beta-4. i thought it was a typo. it was not."

what's inside
  • →why "TB-500" by definition names a fragment, not the protein the trials studied
  • →what mass spectrometry actually finds in vials sold under the name
  • →every human trial RegeneRx ran, and why the late-stage record is a wall of misses
  • →the one number on a certificate of analysis that tells you what you bought
  • →why the molecule is close to S-grade and the grade is still an A

one read, ~13 minutes, fully sourced. one of many briefs included with $100 lifetime access.

free excerpt

for months i read certificates of analysis for a healing blend a lot of people research, the ghk-cu / kpv / bpc-157 stack sold with "TB-500" printed on the label. every time, in the net peptide content, where i expected the line to read TB-500, the lab had written something else: thymosin beta-4. the first time, i assumed it was a transcription slip, someone in the testing queue typing the famous parent protein instead of the fragment on the label.

chapters · 9
  1. 01the coa that didn't say what i expectedcold open
  2. 02the name is the first liethe name
  3. 03what's actually in the vialthe vial
  4. 04the molecule itself is not a fairy talethe biology
  5. 05the preclinical record is deep, and it is preclinicalpreclinical
  6. 06the human wallhuman trials
  7. 07approved nowhereregulatory
  8. 08the grade, and why it doesn't move to sthe verdict
  9. 09if you're going to buy it anywaypractical
who this is for
you follow the glp-1 space
and you want the head-to-heads, the tradeoffs, and the next molecule in line.
you're researching the class
and you don't want to read 30 medscape pieces and a reddit thread to map the evidence.
you write or trade in this space
and you need the timeline, the head-to-heads, and the next-gen pipeline in one document.
you're a clinician
and you want a fast brief that respects the literature and won't waste your time on hype.
one lifetime license · no renewal
$100.

one payment for every reptides editorial brief, every research tool, and every future paid release. yours forever.

own it forever · $100 →
one payment by Stripe · yours forever · research reference, not medical advice