Our expert says:
Acne is caused by increased production of sebum oils in the skin and together with a bacteria (propionibacterium acne) it causes inflammation in the skin. Raisins contain vit C, antioxidants and fibre which is overall good for your immunity system but would not specifically clear up acne. If he has tried Benzoylperoxide, topical antibiotics, oral antibiotics, and it hasn't helped, a course of Roaccutane for 3-4 months may be the answer.
See also : http://www.aad.org/public/publications/pamphlets/common_acne.html
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