Nature Made Vitamin D3 1000 IU (25 mcg) Tablets, Dietary Supplement for Bone and Immune Health Support, 350 Count - Walmart.com
Amazon.com: Nature Made Vitamin D3 2000 IU (50 mcg), Dietary Supplement for Bone, Teeth, Muscle and Immune Health Support, 220 Tablets, 220 Day Supply : Health & Household
Do You Really Need to Take Vitamin D Supplements? – Cleveland Clinic