I think zinc helps but personally I have to do other things as well to stay clear. The usual dosage is 50 mg or less. Shouldn't go above 50 mg on a regular basis. Studies have shown that acne prone people are often low in zinc. I like "NOW L-Opti Zinc" brand. Also eat zinc rich foods as getting nutrients from foods is best. Eat whole unprocessed foods and avoid diary, sugary foods, and processed oils.