Synthesis and Structure–Activity Investigation of Iodinated Arylhydantoins and Arylthiohydantoins for Development as Androgen Receptor Radioligands

The conversation discusses reliable brands for RU58841, with recommendations for RUdirect and Receptorchem. Users also mention Anageninc as a known option for RU58841 in Europe and the UK.

RU58841 shows the strongest results despite weaker binding affinity, while KX-826 and CB-03-01 are more expensive and have minimal side effects. RU58841 is considered effective but has potential health risks if ingested; users report positive outcomes with RU58841 and finasteride.

KX-826 is considered effective for hair maintenance, with better safety research than RU58841, but lacks positive anecdotes. RU58841 is seen as potentially stronger, but concerns exist about systemic effects; combining anti-androgens with 5AR inhibitors is suggested for better results.

RU-58642 is a powerful anti-androgen that was not developed further, possibly due to safety concerns or financial reasons. RU58841 is a topical alternative, but it is less effective than finasteride and dutasteride, and its long-term effects are not well-studied.

RU58841 and Pyrilutamide (Kx-826) are both topical anti-androgens, but neither is effective for hair regrowth. RU58841 has more anecdotal support, while Pyrilutamide has progressed further in trials, though both have limitations.

RU58841 is discussed as a topical anti-androgen for hair loss, but its effectiveness and safety are not well-documented, leading to mixed opinions and experiences among users. Some combine it with finasteride, but concerns about side effects and lack of FDA approval limit its popularity.