The Saturday letter she actually opens.
Every Saturday at 7 a.m., one short letter: which peptide prices moved this week and which new study deserves your coffee time, translated into plain English by an editor who reads the trials so you don't have to. Written for women who research carefully and buy once. About 4,800 of us so far. Free, ad-free, and we never sell the list.
CJC-1295 moved up 8% last month. Here is why it is almost always purchased with Ipamorelin.
CJC-1295 5mg vials climbed roughly 8% across the vendors we index over the last 30 days. Ipamorelin, which researchers almost always acquire alongside it, held flat. Here is what caused the split, and what the research actually says about using them together.
Read this week's letter →Bacteriostatic water disappeared from Amazon. Here is where to find it now.
Amazon removed BAC water listings in early 2026 after independent testing found most products failing on pH and benzyl alcohol content. If you reconstitute research peptides, your supply chain changed. Here is what happened and what to do about it.
Read →What three vendors quietly cut GHK-Cu prices this week
A close read of the most-watched per-mg movements in the last seven days, plus one new paper worth your weekend.
Read →Retatrutide is finally on three indexes. Should you care yet?
On the difference between availability and good research. Plus a letter from a reader about gut peptides at midlife.
Read →A field guide to reading a COA — without a chemistry degree
What 'purity ≥99%' actually means, what to ignore, and how three vendors talk past each other in the same paragraph.
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