Breast cancer, measuring hormone levels, probiotics and dental problems top this week's show

Summary: Breast cancer cells create growth factors out of cholesterol; Severely overweight mice have fewer taste buds and thus don't taste sweets as well; Vitamin D levels in African Americans and the problems of measuring hormone levels; Various ways to escape chronic migraines and rebound headaches; Legumes, nuts and seeds are excellent sources of protein — advice to reduce carbohydrates; Are birth control pills good to prevent ruptured ovarian cysts? Restoring gut flora with probiotics after antibiotics for a root canal; Dental problems in elders: exaggerated gag reflex and loosing too many teeth! A scratch test to diagnose itching from excess histamine and how to combat it