NOW Foods Vitamin D-3 2,000 IU delivers a clinically relevant dose of cholecalciferol — the same form of vitamin D your body naturally produces from sun exposure. At 2,000 IU this represents a therapeutic daily dose commonly recommended by integrative physicians and nutritionists for those with confirmed deficiency or insufficient sun exposure, which is extremely common in northern climates, office workers, and darker-skinned individuals. Vitamin D-3 is critical for calcium absorption, bone density, immune regulation, mood support, and healthy cell growth. NOW Foods provides D-3 in an oil-based softgel for maximum absorption of this fat-soluble vitamin, manufactured in their GMP-certified facility with potency verification. An ideal dose for those looking to correct or prevent deficiency and maintain optimal 25(OH)D blood levels year-round.