Stop guessing what a milligram actually costs.
The free, vendor-neutral calculator built for women researching peptides for skin, longevity, hormones, and midlife weight. One number matters when you’re sourcing — the price per milligram. We do that math out loud.
What we’re tracking this week.
The peptides our readers are pricing most — with the current per-mg low and high across every vendor we index, and the best discount we know of on each. Click any row for the research notes.
Discount codes are gathered from vendor sites & mailing lists and change often — we surface every one we know of, not just our own. Verify at checkout. See all live deals in the tool →
A five-milligram vial for twenty-eight dollars sounds cheaper than a ten-milligram vial for forty-five. Per milligram, that “cheap” vial costs $5.60 against $4.50 for the larger one.
Multiply across a year of research and the difference isn’t small — it’s often the cost of a whole extra protocol. Vendors know this, which is precisely why pricing is rarely presented per milligram.
We built the Lab because nobody we trusted was doing the math out loud, and because the women doing this research — for skin, for sleep, for the long game of midlife — deserved better than gym-forum pricing folklore. We do the math here. Out loud, every week.
The vendors, indexed & annotated.
A sample of the vendors we track and price — none of them paid to be here.
What moved, what matters, and what the research really says.
A short, honest letter on what’s moved in the per-mg market — and what new research is actually worth reading. Saturdays, for women who do their homework.