Amazon.com: Nature Made Vitamin D3 1000 IU (25 mcg), Dietary Supplement for Bone, Teeth, Muscle and Immune Health Support, 300 Day Supply,300 Count (Pack of 1) : CDs & Vinyl
10,000 IU vitamin D daily is safe, toxicity start at 150 ng (for monotherapy)– Jan 2013 | VitaminDWiki
Amazon.com: Vitamin D3 20,000 IU + K2( MK7 ) 200mcg - Once Daily Dose, Optimal Level -Support Strong Bone, Immune Health & Calcium Absorption, Helping Vitamin D Deficiencies, Easy to Swallow, 240
recommended dietary allowances for vitamin D | Download Table
Too Much Vitamin D: Signs, Treatment, and Daily Dosage