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Free Androgen Index

Free Androgen Index

£10.80
Calculates Free Androgen Index (FAI) to assess active testosterone levels and detect hormonal imbalances—even without symptoms
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About this test

  • Fatigue or low energy
  • Acne or oily skin
  • Excess facial or body hair (hirsutism) in women
  • Hair thinning or hair loss (especially at the crown or temples)
  • Irregular or missed periods
  • Difficulty conceiving (infertility)
  • Low libido or sexual dysfunction
  • Mood swings or irritability
  • Weight gain, particularly around the abdomen

    Reduced muscle mass or strength

    No symptoms at all in early or mild hormonal imbalance

Recommended for individuals experiencing symptoms of hormonal imbalance such as acne, hair loss, low libido, or irregular periods. Ideal for those with suspected conditions like PCOS, androgen deficiency, or unexplained fertility issues. Also suitable for anyone monitoring testosterone activity or seeking insight into their hormonal health—even when symptoms are subtle or absent.

  • Polycystic Ovary Syndrome (PCOS)
  • Androgen excess (in women)
  • Androgen deficiency (in men or women)
  • Hormonal imbalance linked to acne, hair loss, or irregular periods
  • Infertility or ovulatory dysfunction
  • Low libido or sexual dysfunction
  • Hirsutism (excess facial/body hair in women)
  • Muscle weakness or reduced lean mass
  • Age-related hormone decline
  • Endocrine or pituitary disorders affecting testosterone regulation

Symptoms

  • Fatigue or low energy
  • Acne or oily skin
  • Excess facial or body hair (hirsutism) in women
  • Hair thinning or hair loss (especially at the crown or temples)
  • Irregular or missed periods
  • Difficulty conceiving (infertility)
  • Low libido or sexual dysfunction
  • Mood swings or irritability
  • Weight gain, particularly around the abdomen

    Reduced muscle mass or strength

    No symptoms at all in early or mild hormonal imbalance

Who should be test

Recommended for individuals experiencing symptoms of hormonal imbalance such as acne, hair loss, low libido, or irregular periods. Ideal for those with suspected conditions like PCOS, androgen deficiency, or unexplained fertility issues. Also suitable for anyone monitoring testosterone activity or seeking insight into their hormonal health—even when symptoms are subtle or absent.

When to test

  • Polycystic Ovary Syndrome (PCOS)
  • Androgen excess (in women)
  • Androgen deficiency (in men or women)
  • Hormonal imbalance linked to acne, hair loss, or irregular periods
  • Infertility or ovulatory dysfunction
  • Low libido or sexual dysfunction
  • Hirsutism (excess facial/body hair in women)
  • Muscle weakness or reduced lean mass
  • Age-related hormone decline
  • Endocrine or pituitary disorders affecting testosterone regulation

What's measured

What gets tested