I went to see Dr. Epstein because I was experiencing thinning hair. The most common reason for female hair loss is due to high DHT levels (testosterone) or low estrogen. They ran thorough blood tests for thyroid and hormones. Everything came out normal other than low vitamin D levels, you literally have to be in the rickets stage before hair loss occurs from a deficiency in this vitamin. I'm certain my hair loss is due to high DHT levels. My scalp itches like crazy. Also my identical twin sister has not had any issues, and she has recently had a baby (so is fired up with estrogen). It also started thinning about the time I stopped taking a contraceptive pill. He refused to prescribe me with Spironolactone, a DHT blocker. I would recommend that Dr. Epstein read Geoffrey Redmond's book, "It's Your Hormones." "Follicles overly sensitive to testosterone can shed their hairs when exposed to even a whiff of testosterone, even if levels read normal."
I was very fortunate to visit a young, knowledgeable dermatologist (Dr. Matthew Woods) who thankfully confirmed that I did indeed have androgenic alopecia and prescribed me with Spironolactone. I didn't even mention the drug to him. This guy has certainly done his homework!
Dr. Epstein did however notice an enlarged thyroid and suggested that I go for an ultrasound. I'm thankful for his advice because a nodule was found, luckily non-cancerous.