21st Century Vitamin D3 with Calcium (10000 IU, 250mcg, 110 Tablets, 57mg)

Vitamin D3 is essential for absorption of calcium and supports bone, teeth and immune system health.
What happens when your vitamin D is low? Vitamin D insufficiency leads to secondary hyperparathyroidism that causes increased bone loss, osteopenia, osteomalacia, osteoporosis, and increased fracture risk. ... A severe vitamin D deficiency can cause myopathy, which can cause muscle weakness and pain.
How much vitamin D should you take a day? Bottom line: Vitamin D intake is recommended at 400–800 IU/day, or 10–20 micrograms. However, some studies suggest that a higher daily intake of 1000–4000 IU (25–100 micrograms) is needed to maintain optimal blood levels.
Can I take vitamin D daily? The current recommendations suggest consuming 400–800 IU (10–20 mcg) of vitamin D per day. However, people who need more vitamin D can safely consume 1,000–4,000 IU (25–100 mcg) daily. Consuming more than this is not advised, as it is not linked to any extra health benefits.
Vitamin D is Best Taken With Meals As Vitamin D is a fat-soluble vitamin and won't dissolve in water, the best time to take Vitamin D is with a meal. It is absorbed better in your bloodstream when paired with high-fat foods.