Get your fill of D3 with this complete complex, fortified with K2 to maximize its bone-boosting benefits and Spirulina as an anti-aging bonus. More potent than other brands, with 10,000 IU per dose.

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Product Review

Get your fill of D3 with this complete complex, fortified with K2 to maximize its bone-boosting benefits and Spirulina as an anti-aging bonus. More potent than other brands, with 10,000 IU per dose.

Feeling sluggish, sad or unfocused due to possible D deficiency? Concerned with deteriorating bone health? Choose a high-potency D3 supplement that addresses the nutrients your body's lacking-without all the questionable ingredients.

Why Not Natural Vitamin D-3 / K-2 with U.S. grown Organic Spirulina contains the same bio-active form of D you get from the sun outdoors. Plus, we've also added K2 to help calcium reach your bones instead of landing in your joints and arteries and causing problems.

High-dose formula - 10,000 IU
With K2, necessary for D3 to work properly in your system
K2 is sourced from MK-7, extracted from natto
With organic Spirulina, rich in antioxidants and fatty acids
Natural, with no rice flour or stearate fillers
Free of soy, GMOs & gluten
Vegetarian & cruelty free

You'll find no additives or unhealthy fillers in our Vitamin D3 / K2 with Organic Spirulina supplement, and it's also free of allergens such as soy and gluten. This vegetarian-friendly product is made in the USA in a GMP-certified manufacturing facility, so you can trust in its quality and safety.

Protect your bone and heart health the effective, natural way with Why Not Natural Vitamin D3 / K2.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.



  • HIGH POTENCY - With 10,000 IU of D3 and 100 mcg of K2 to quickly build up vitamin D levels and support your bone health and immune system.
  • MAXIMUM ABSORPTION - Same bioactive form of Vitamin D as Sunshine plus Vitamin K-2 which moves calcium to bones and teeth (and improves absorption!) and away from arteries and brain.
  • POTENT VITAMIN - We add organic USA-grown Spirulina which is rich in Magnesium, maximizing vitamin D absorption. Spirulina's iron, B vitamins & antioxidants further support mood and immune function.
  • NO HARMFUL FILLERS - Instead of common rice flour or stearate fillers, we use U.S. grown, organic Spirulina! Our formula is vegetarian, keto-friendly, non-GMO, gluten-free, and tested for purity & potency.

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