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by Life Extension
Supplementing with vitamin D goes a long way. Vitamin D helps preserve youthful cognitive function, supports bone and immune system health, helps maintain already-healthy blood pressure, encourages a healthy inflammatory response and promotes endothelial function. We recommend between about 125 mcg (5,000 IU) to 200 mcg (8,000 IU) of vitamin D3 a day.
This product is American-made.