Xeno Laboratories Primobolan Enanthate 100 mg Research Vial

Primobolan is the trade name of methenolone. This vial carries the injectable enanthate ester at 100 mg/ml, not the oral acetate. Methenolone is a 5-alpha reduced androgen with a moderate anabolic and weak androgenic profile, so it is one of the mildest injectables in the line, and it was a registered medicine for anaemia before being withdrawn in most markets.

No. Methenolone is not converted to estradiol by aromatase, so the compound itself brings no water retention and no breast tenderness, and a mild appearance rather than a bloated one is expected. As with any non-aromatising androgen, this can leave estrogen low once a strong base ester is out of the picture, which is exactly why these vials are usually read beside a testosterone base and beside bloodwork.

The published elimination half-life is about 10.5 days after intramuscular injection, the longest of the methenolone esters, which is why twice-weekly reference injections are enough. Urine metabolites are described as clearing over weeks rather than days, and newer long-term metabolites extend that window. No single agreed week figure was found, so the exact detection window stays unconfirmed.

Because the androgenic rating is low, acne and hair shedding are reported less often than with stronger DHT compounds, but they are not absent. The predictable effect of any injected androgen is suppression of natural testosterone production, so recovery has to be planned. Hepatotoxicity is not described for this ester, and the changes seen in routine bloodwork are the usual lipid shift and a fall in endogenous testosterone.

With no registered sports use there is no approved dose to quote. Community references sit at roughly 200 to 300 mg per week for a first block, 400 to 500 mg at the intermediate level and 600 mg at the top, run for 10 to 16 weeks, injections split twice weekly because of the long ester. These are community protocols for discussion, not a recommendation, and the compound is widely described as slow to show anything.

This vial is listed as research material with international checkout and a U.S. domestic option. It is shipped from stock, orders are handled within one to two business days, and each batch ships with an HPLC report. Stock, variant and the current price are shown in the product block above; at the time of checking, the listing carried an out of stock marker while packs are restocked, so confirm the stock line before ordering.