By the way, doctor: What's the right amount of vitamin C for me?

Q. I'm 79 years old and have been taking 3,000 mg of vitamin C a day for years. I'm now uneasy about taking this amount and plan to cut back to 1,000 mg daily. Is this the right dose? Will my body be startled by the abrupt change?

A. Cutting back is a wise decision. You've been taking much more vitamin C than you need.

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