Allergy Research Group Zinc Picolinate is a dietary supplement for immune system support. Zinc is an important mineral for your body. It supports the immune system, supports body tissue repair, supports proper use of carbohydrates by your body, and provides protection for cells from harmful free radicals. Zinc is involved in over 30 enzyme reactions in the body. It is not produced in the body, so it must be obtained through your diet. If your diet does not provide you adequate amounts of zinc, supplementation may be necessary and this product is easily absorbable.