Dr. Katz answers your health and nutrition questions in these 2-minute videos from Vidoyen:

How much Vitamin D do you suggest for a child?

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Are organic soy product dangerous to our hormonal balance and health?

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What do you recommend for CFS?

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What is the holy grail of behavior change for health?

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Lifestyle as medicine: do we really know enough?

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My 15 year old son is taking Creatine – is it safe and healthy for someone his age? If so,how much?

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