Datis Kharrazian, PhD, DHSc, DC, MS, MMSc, FACN is a Harvard Medical School trained and award-winning clinical research scientist, academic professor, and world-renowned functional medicine
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I bought his book over a year ago. I still have not read it. But I am leaning a lot from this video.
At approx 34 minutes he explains Parkinson’s but the whole video is relevant.