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    Did you mean Free Testosterone Index?
    GlossaryFree Androgen Index (Free Testosterone Index)

    ratio estimating active testosterone in the bloodstream

    The Free Androgen Index (FAI) is a ratio used to estimate the amount of active, or "free," testosterone in the bloodstream. It is calculated by dividing the total testosterone level by the sex hormone-binding globulin (SHBG) level and then multiplying by 100. This index is particularly useful in diagnosing conditions related to hormonal imbalances, such as polycystic ovary syndrome (PCOS) and certain types of alopecia.

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      learn Finasteride

      Frontline, gold standard treatment for combatting androgenic alopecia

      learn Dutasteride

      Heavy duty finasteride that comes with higher risks, but scalp injections seem safe and are gaining popularity
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      learn Cyproterone

      a synthetic anti-androgen and weak progestogen that inhibits DHT binding to androgen receptor

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      a natural and far less effective alternative to Finasteride

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      community Is it a lot of free testosterone?

      in Finasteride/Dutasteride  3 upvotes 3 months ago
      The conversation discusses hair loss and the impact of testosterone and DHT levels, with suggestions to monitor these levels and consider vitamin D supplementation. Treatments mentioned include finasteride and possibly minoxidil.
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      community Just got some test results back.

      in Finasteride/Dutasteride  4 upvotes 4 years ago
      The user received hormone test results showing normal estradiol and testosterone levels, low SHBG, and normal free androgen index. They are considering starting finasteride but are concerned due to being slightly overweight.

      community Help interpreting pre-fin bloodwork

      in Finasteride/Dutasteride  12 upvotes 3 years ago
      A 20-year-old male is unsure how to interpret his bloodwork results and whether he should take finasteride for hair loss. His bloodwork shows borderline high levels of albumin and testosterone, and high progesterone, but normal levels of other hormones.

      community Cbum's hair transplant looks absolutely terrible

      in Transplants  967 upvotes 1 week ago
      A bodybuilder's hair transplant appears unnatural with a straight hairline and low density, possibly worsened by not using finasteride. The Turkish clinic is criticized for poor design, and the transplant may have been free for promotion.