Description
Mesterolone 25mg per tablet, fifty tablets to a bottle, 1,250 mg in total. The compound is a 1-methylated dihydrotestosterone derivative, sold in Europe under the Proviron name and never registered in the United States. As an anabolic steroid it is Schedule III here. Research use only, not for human consumption, adults 21 and over, with purchase restrictions by state.
What is in the container
| Compound | Mesterolone |
|---|---|
| Content per tablet | 25 mg |
| Units per container | 50 tablets |
| Total content | 1,250 mg |
| Molecular mass | 304.5 approximately |
| Structure | 1-alpha-methyl dihydrotestosterone |
| Controlled substance status | Schedule III |
| US registration | None, past or present |
| Sold as | Mesterolone 25mg, research use only |
Twenty five milligrams per unit is a high content for an oral listing, and it is the reason the per-milligram figure for mesterolone 25mg sits near the bottom of the oral shelf rather than the top.
You will find mesterolone 25mg under oral reference materials in the anabolics reference materials catalogue.
Mesterolone 25mg and the 17 position
Mesterolone is dihydrotestosterone with a methyl group at the 1 alpha position, molecular mass about 304.5. The interesting thing structurally is what it does not have: there is no alkyl group at carbon 17, so it falls outside the 17-alpha-alkylated subclass that most of the oral compounds on this shelf belong to.
That distinction is chemistry rather than commentary. A 17-alpha-methyl group turns the 17 hydroxyl into a tertiary alcohol and changes how the molecule resists oxidation at that carbon, and mesterolone 25mg keeps the secondary alcohol instead.
One thousand two hundred and fifty milligrams
25 mg times 50 tablets is 1,250 mg. At $74 that is about $0.059 per milligram, which is the figure printed under the price. The pharmaceutical blister presentation of the same compound and the same unit content divides to roughly $0.088, and both numbers are published where they can be compared.
Why price per milligram beats the price on the bottle sets out the method and its limits.
United States regulatory status
No mesterolone product is approved for human use in the United States and none ever has been. European registrations exist, which is a fact about other countries and does not create a prescription equivalent here. Mesterolone 25mg is a Schedule III controlled substance as an anabolic steroid. The DEA publishes the schedules and the FDA’s drug approvals and databases hold the United States approval record.
What the certificate of analysis covers
Two separate questions get answered on the certificate, and they are easy to confuse. Purity is reported by HPLC as a percentage of total peak area, which is a statement about the chromatogram: one large peak, and whatever else the detector saw. Identity is a different test, where mass spectrometry compares the measured mass against the mass the structure predicts. A sample can pass on identity and still carry a two percent secondary peak, so both figures are printed rather than the flattering one. Residual solvent for mesterolone 25mg is reported in parts per million. The lot number on the container is what ties the paperwork to mesterolone 25mg in front of you.
Our walkthrough of a certificate of analysis goes through the same document field by field.
What arrives
One sealed container of this material, labelled with the compound, the content per unit, the count or fill volume, and the lot number that matches the certificate linked on this page. Storage conditions are on the listing. The packing note names the item in full. We do not ship unlabelled containers, do not split lots across containers, and do not describe the contents as anything other than what they are.
No protocols, and why
We publish no dosing information, no administration instructions and no account of physiological activity for this compound or for anything else on this shelf. Staff will not supply it either.
That is a settled policy rather than a cautious mood. Enforcement in this category has turned on exactly that content: a page describing quantities and outcomes for a material is treated as promoting an unapproved drug whatever the footer says. Research use only is not a legal strategy, and the FDA has said so in writing sets out the detail. The FDA’s drug information section is the primary source.
This is laboratory stock. Research use only for this item, not for human consumption, and not approved for administration to a person or an animal in any jurisdiction. Sales are limited to adults 21 and over and to states where the compound is lawful, which the listing states and the checkout applies. Lot certificates, current and historical, sit on the lab results page beside the note on price per milligram.
US regulatory status. No mesterolone product is approved for human use in the United States.
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