Vitamin D3 + K2

Appreciate the verifiable quality of Sports Research products. Slowly transitioning the supplements stacks for my wife (66) and myself (67) to mearly all Sports research. Combined with twice a week strength training Im looking forward to a long and healthy retirment for us both!

Haven’t used this for too long yet, but seems fine. I’ll know more next time I get my levels checked. I am trying this product based on reading great reviews.

One of the best 3 (3rd tested) products that work and they are pure ingredients. Also, Doublewood supplements & Dr Berg supplements.