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c/compounding·posted 21 days ago by u/receptor_bias_rick

switched from compounded to brand and the titration reset itself

Pricing

Long-ish post, sorry. tl;dr at the bottom.

I have been tracking 503A against ApoB for 15 weeks because I could not find anyone who had. The correlation is weaker than I expected, which is itself mildly interesting given how confidently people link the two in here.

Caveats up front: one person, one lab, one assay, no control, and I changed my training in the middle of it, which was stupid.

tl;dr: probably real, definitely smaller than the threads imply, and not worth reorganising your week around.

1,174 up / 1,047 down53% upvoted19 commentsid 1ojkn19 Jul 2026

19 comments

12 in this archive, depth 4

best — the order this archive was captured in

u/marit_laurent16 points·21 days ago

Every time this gets posted it hits the front page and every time someone has to re-explain it.

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u/lift_heavy_thingsresistance training23 points·20 days ago

Yeah, 503A and 503B are different regulatory animals.

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u/receptor_bias_rickOP0 points·20 days ago

That is net peptide content, not purity. Different number, different meaning.

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u/kavya_kravchenko1 point·19 days ago·edited

Respectfully this is a sample of one presented as a finding.

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[removed]1 point·19 days ago

[removed by moderator]

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u/santiago_rasmussen8 points·20 days ago

This is correct. The shortage list does expire and the rules change.

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u/julia_erdogan9 points·20 days ago

API source questions are on-topic and compounders dodging them is newsworthy

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u/naomi_erdogan-29 points·20 days ago
well that is my evening gone, thanks for the paper
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u/tb500_tangent-33 points·20 days ago

the shortage list is temporary, it ends and compounding becomes illegal again

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u/eu_apotheke_a0 points·20 days ago

the shortage list is temporary, it ends and compounding becomes illegal again

Yes, exactly this, and it is the bit that took me 77 weeks to accept.

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u/lukas_vermeulen1 point·19 days ago·edited

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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About c/compounding

Compounded GLP-1s as a supply route: the 503A/503B distinction, the shortage-list mechanics that made compounding legal and then didn't, state board rules, telehealth prescriber models, and what a compounding pharmacy will and will not tell you about its API source.

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