My hairdresser advised silica, from a health food store which I have 10ml daily in a small glass of water to help my hair 'from the inside'. A lady there also recommended a range of shampoos and conditioners that don't contain sulphates and she said would help with the hair loss and help to improve regrowth time, she also made me up a little bottle of oils (rosemary, cedarwood and lavender) to rub into the bald spots also to help improve the growth. I've been doing it for two weeks and the hair loss has slowed right down and the regrowth has improved heaps.
Hope this helps someone.
ME