Life Extension Vitamin D3 125 mcg (5000 IU), Bone Health, Brain Performance, Immune System Support, Gluten-free, Non-GMO, Once Daily, Two-month Supply, 60 Softgels

"What is Vitamin D3? Vitamin D3 is well-known for supporting strong bones, a sharp mind and a robust immune system.

Your body makes its own vitamin D when exposed to sunlight—but it’s not always enough.

So a daily, high potency vitamin D3 supplement is key: It helps fill in the gaps in your body's vitamin D supply! Vitamin D3 plays a vital role in calcium absorption, which helps maintain healthy bone density."