Vitamin D + K2 Liquid

The combination Vitamin D + K2 formula by Thorne is ideal for those wanting to support bone, cardiovascular, and immune health.* If you’re unsure whether you need vitamin D supplementation, we recommend having your vitamin D levels tested to help determine if supplementation is appropriate for you.

We test each ingredient in Vitamin D + K2 for identity, purity, and potency to ensure every ingredient and finished product meet our strict quality standards at the time of manufacture and up to the product’s expiration date. This includes checking for contaminants like heavy metals, pesticides, and harmful microbes. When the product carries the NSF Contents Certified mark, it means it has been third-party tested and certified according to strict standards for quality, safety, and label claims.

Vitamin D3 is generally considered the preferred form of vitamin D because research shows it is more effective at raising and maintaining healthy vitamin D levels in the blood than vitamin D2. Both forms support bone health and overall vitamin D status, but D3’s greater ability to sustain optimal levels is why it’s commonly recommended in supplements.*

Vitamin D3 and vitamin K2 work synergistically in the body. For individuals supplementing with vitamin D, adding vitamin K2 can provide complementary support for bone and cardiovascular health.* Whether you need to take both vitamins depends on a variety of individual health factors and is best discussed with your health-care provider. If you are taking blood-thinning medication, consult your health-care professional before using vitamin K-containing supplements.

Vitamin D and K2 are stronger and more effective when taken together than either one alone. While vitamin D enhances the absorption and retention of calcium, vitamin K2 helps direct the absorbed calcium into the appropriate parts of your body, such as your bones and teeth – and keep it out of soft tissues like your arteries and kidneys, where you don’t want excess calcium to build up.*