Prohormon

Prohormones are steroids with an extra step

A prohormone is a precursor: an inactive or weakly active compound converted by enzymes in the body into an active anabolic hormone. This section holds 4 lines from £51 to £81, mostly Halodrol-type products.

The conversion step is the only structural difference from what sits in the oral steroids range. Once conversion has happened, the hormone acting on the androgen receptor is an anabolic steroid.

Why “not a steroid” is misleading

The phrase was historically a legal and marketing distinction rather than a pharmacological one. In the United States prohormones occupied a gap that let them be sold as supplements until legislation closed it in 2014.

Nothing about that gap made them gentler. Prohormones are typically methylated for oral activity, which means the same liver toxicity as any methylated oral, plus suppression, plus whatever the converted hormone does. Buyers who read “supplement” as “mild” have it exactly backwards.

The extra uncertainty

Conversion efficiency varies between individuals depending on enzyme activity, so the same dose produces different blood levels in different people. With a direct steroid you know what you are administering; with a prohormone you know what you are administering and not what fraction becomes active.

That variability is a genuine argument against them relative to the direct compound, and it rarely appears on the label.

What is stocked here

The products in this section are Halodrol-type preparations from supplement-sector manufacturers rather than the pharmaceutical-style labels elsewhere in the catalogue. That is worth noting because manufacturing standards and label accuracy in that sector have historically been poor, and independent testing has repeatedly found contents differing from labels.

Verification guidance is in how to check a brand is genuine.

What they require

Liver monitoring, because they are methylated. Oestrogen control where the converted hormone aromatises. And post cycle therapy, because suppression happens exactly as it would with the direct compound.

How to think about the price

At £51 to £81 these sit above most direct orals stocked here, which is an odd position for a product delivering the same hormone less predictably. The premium reflects the supplement-sector packaging and retail conventions rather than anything about what is inside.

Frequently asked questions

Are prohormones steroids?
They convert into steroids in the body. The distinction was legal and commercial, not pharmacological.

Are they milder than oral steroids?
No. Most are methylated, carrying the same liver toxicity, plus conversion uncertainty on top.

Do they need PCT?
Yes. The converted hormone suppresses natural production exactly as the direct compound would.

Why does the same dose affect people differently?
Conversion depends on individual enzyme activity, so the active fraction varies.

Why buy these over the direct compound?
Largely availability and framing. Pharmacologically the direct compound is more predictable.