D3 by Design — D3 + K2

Vitamin D only works when calcium has somewhere to go — so this pairs 5,000 IU of bioidentical D3 with 200 mcg of K2 as MK-7, the menaquinone form with the highest bioavailability and longest half-life in the blood.

The K2 directs calcium toward bone and away from soft tissue. Most adults are deficient and don't know it, because a level called "normal" often sits in the lowest third of the range. Soy-free, one softgel a day.

Who it's for: Most adults. We don't get the sun exposure that produces adequate D, and supplementation is a low-cost, well-tolerated way to reach an optimal level.

How to use: 1 softgel daily with a meal containing fat.