High strength vitamin and mineral blemish formula niacinamide vitamin b3 is indicated to reduce the appearance of skin blemishes and congestion a high 10 concentration of this vitamin is supported in the formula by zinc salt of pyrrolidone carboxylic acid to balance visible aspects of sebum activity contraindications if topical vitamin c is used as part of skincare it should be applied at alternate times with this formula ideally vitamin c in the pm and this formula in the am otherwis