Best vitamins and supplements for men. Tea Tree Oil Therapy. The epididymis, the tube through which sperm pass from the testicle through the penis, needs selenium to function properly. Digestive Aid - 60 Capsules Retail: Diabetics should not take selenium supplements, but get the nutrient through their diet. Kirkland Signature. An 8-ounce glass of orange juice contains about milligrams of Vitamin C. Multivitamins Natural Pet Care. Curcumin Powder From Fresh Turmeric. Jarrow Formulas. Mother Nature Resveratrol Our Low price: Gut-dwelling bacteria keep pathogens harmful microorganisms in check, aid digestion and nutrient absorption, and contribute to immune function. Immune System.