Yeah, as I suspected…. Well, as I said already, post and ask for help here:
I just asked perplexity again, since I don’t have a lot of experience for female hair loss. As I said, it’s more complex.
To rule out causes of hair loss in women, including PCOS and hormonal imbalances, the following blood tests are typically recommended:
## Blood Tests to Investigate Hair Loss
- **Full Blood Count (FBC)**: To detect anemia, which is a common cause of hair thinning, especially in women with heavy menstrual cycles or low iron intake[1][4].
- **Iron Studies and Ferritin**: Low ferritin and iron levels can impair healthy hair production and contribute to hair shedding and thinning[1][4].
- **Vitamin Levels**: Particularly vitamin D and B12, as deficiencies in these can cause hair loss[4].
- **Thyroid Function Tests (TSH and Free T4)**: Both hypothyroidism and hyperthyroidism can cause hair thinning or loss, so thyroid evaluation is important[4][6].
- **Sex Hormone Tests**: Including testosterone (total and free), luteinizing hormone (LH), follicle-stimulating hormone (FSH), sex hormone-binding globulin (SHBG), estradiol, and dehydroepiandrosterone sulfate (DHEA-S) to assess hormonal imbalances that may cause hair loss[1][3][4][6][9][10].
- **Anti-Müllerian Hormone (AMH)**: Elevated in PCOS and reflects ovarian follicle activity, useful in PCOS diagnosis[6][9].
- **Blood Glucose and HbA1c**: To check for insulin resistance or diabetes, conditions often associated with PCOS and which can contribute to hair loss[4][6].
- **Prolactin**: Elevated levels can affect menstrual cycles and hair growth[9].
- **Other Tests**: Sometimes inflammatory markers (CRP, ESR), cortisol levels (stress hormone), and autoimmune markers (ANA) may be tested depending on clinical suspicion[4].
## Specific Tests for PCOS Diagnosis
- **LH and FSH**: PCOS often shows an elevated LH to FSH ratio[6][8].
- **Testosterone and SHBG**: High testosterone and low SHBG levels are common in PCOS and contribute to symptoms like hair thinning[5][6][9][10].
- **17-alpha-hydroxyprogesterone**: To exclude other causes of androgen excess[9].
- **Lipid Profile**: PCOS is linked to unfavorable lipid levels, which may be assessed as part of overall health evaluation[6].
## Summary
For a woman experiencing hair loss with suspicion of PCOS or hormonal causes, a comprehensive blood panel should include:
- Complete blood count (CBC/FBC)
- Iron studies and ferritin
- Vitamin D and B12 levels
- Thyroid function tests (TSH, Free T4)
- Hormonal panel: Testosterone (total and free), LH, FSH, SHBG, estradiol, DHEA-S, prolactin, 17-OHP
- Anti-Müllerian hormone (AMH)
- Blood glucose and HbA1c
- Lipid profile (optional but useful in PCOS)
These tests help identify anemia, nutritional deficiencies, thyroid disorders, androgen excess, insulin resistance, and other conditions that can cause or contribute to hair loss in women[1][3][4][5][6][9][10]. A healthcare provider will interpret these results in the context of symptoms and clinical findings to diagnose PCOS or other causes of hair loss and guide appropriate treatment.
Now, if you have autoimmune, things are getting more complicated. A biopsy would help, if it’s possible.