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Immune Support & Vitamin D

Formulated to support Vitamin D levels and immune system health

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Celebrating Decades of Dedication to Wellness & Natural Supplements. Our Secret? It’s Simple

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It came to me recommended by the Grassrootshealth researchers and I will not buy any other product since taking their VItamin D plus K2. I personally need the 10,000 IU D formula t... Read More


- Alice S.

Bio-Tech is my number 1 choice to purchase Vitamin D3 50. Years ago it was the only place I could find 50k IU. Now I stay for the excellent customer service, reliabilty & speedy sh... Read More


- Melissa

I have had an excellent experience with Bio-Tech for many reasons. 1) Their products are outstanding. My pain doctor recommended that I take Vitamin D and suggested Bio-Tech. I was... Read More


- Robin M.

These pills were suggested from my doctor several years ago and my Vitamin D numbers never looked so good.


- Christy H.