Whats the best conditioning treatment for dry hair that is caused by thyroid problems?

Dry Hair: Kerastase is hands-down the best shampoo on the market, however, you will pay a price for perfection. At about $27 for 8 oz., bain satin is a vitamin-infused shampoo created for parched, dry hair. Choose from 1, 2 or 3, with 3 created for the most parched hair. According to instyle magazine, which named it a "best buy" several years running, bain satin contains cationic polymers that targets dry.