p5

  1. haidut

    Oral pregnenolone as hormone replacement therapy (HRT) in humans

    As many of my readers know, the first step in steroid synthesis is the so-called "side-chain cleavage", which converts cholesterol into pregnenolone (P5). That step is known as the rate-limiting step in the steroid cascade, and its function depends on the redox status and ATP levels. In other...
  2. haidut

    Pregnenolone (P5) May Be Ergogenic And Helps Recovery From Exercise

    Take this study with a grain of salt simply because the only link to it is from a scientific conference, which means the study is not yet published in peer-reviewed journals. Yet, the results it reports are quite interesting. Namely, a single 100mg pregnenolone (P5) dose accelerated recovery...
  3. haidut

    Pregnenolone (P5) - A New Osteoporosis Drug

    About a month ago, I made a post in regards to aspirin becoming a new treatment for osteoporosis. Several months ago, I made another post about an in-vitro study demonstrating powerful anabolic effects of pregnenolone (P5) on bones. Apparently, the protective effects of P5 on bone health are...
  4. haidut

    Pregnenolone (P5) Fully Prevents Testicular Atrophy Due To Steroid (ab)use Or High Estrogen

    I often get emails from bodybuilders, athletes and others who have used or currently use steroids and want to either protect themselves while using those steroids or want to recover after long-term usage. It is well-known that most performance enhancing steroids, including plain testosterone (T)...
  5. haidut

    Pregnenolone Is As Potent As Progesterone As An (irreversible) Aromatase Inhibitor

    Progesterone does not need an introduction here and most people are likely aware of its antiestrogenic effects. A few years ago, I posted a thread with an old French study showing that a 500mg daily dose pregnenolone completely blocked estrogen's effects - an effect identical to what...
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