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D3 5000 With K2 60 Softgels by NutriDyn
NutriDynD3 5000 With K2 from NutriDyn is an ideal supplement choice for individuals seeking to improve their immune system health, their cardiovascular sys...
View full detailsD3 10,000 With K2 60 caps by NutriDyn
NutriDynNutriDyn D3 10,000 with K2 combines vitamin D3 (cholecalciferol) with vitamin K2 as MK-7. Vitamin D helps the body absorb calcium, and vitamin K2 h...
View full detailsD3 5000 120 Softgels by NutriDyn
NutriDynNutriDyn's D3 5000 provide a potent and natural source of vitamin D3, which evidence has shown may promote a healthy cardiovascular system, bone st...
View full detailsVitamin D3 5000 IU by Pure Encapsulations
Pure EncapsulationsVitamin D3 5000 IU by Pure Encapsulations is a high-potency vitamin D3 for people who spend little time in the sun. Vitamin D helps the body absorb...
View full detailsK2-D3 5000 by Xymogen
XymogenXymogen's K2-D3 5000 contains vitamin K2 and vitamin D3. Vitamin K2 is a fat-soluble vitamin that helps the body use calcium. Vitamin D3 is a form ...
View full detailsVitamin D3 1000 IU by Pure Encapsulations
Pure EncapsulationsVitamin D3 1000 IU by Pure Encapsulations provides vitamin D3 (cholecalciferol), the form most similar to the vitamin D the skin makes from sunligh...
View full detailsVitamin D + K2 1 oz by Thorne Research
Thorne ResearchVitamin D + K2 by Thorne Research is a high quality and powerful health supplement which is able to help with optimal bone health and immunity. Thi...
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Vitamin D-5000/Preservative Free 60 Capsules by Thorne Research
Vitamin D-5000/Preservative Free 60 Capsules by Thorne Research
Thorne ResearchVitamin D-5000 by Thorne Research is a professional health supplement which features vitamin D to help with improving levels within the body. This ...
View full detailsD3 Liquid (Micellized) 1 oz by NutriDyn
NutriDynVitamin D, essential for maintaining strong and healthy bones, can be produced naturally in the body after exposure to sunlight. But most people wh...
View full detailsVitamin D Plus K 60 capsules by Klaire Labs/SFI Health
Klaire LabsVitamin D Plus K by Klaire Labs is a highly bioavailable combination of vitamin D3 and vitamin K2 (MK-7). These nutrients work synergistically to h...
View full detailsMicellized Vitamin D3 Liquid 1 fl. oz. (600 Servings) by Klaire Labs/SFI Health
Klaire LabsMicellized Vitamin D3 Liquid by Klaire Labs is a natural Vitamin D supplement manufactured and formulated in an easy to use and highly bioavailable...
View full detailsVitamin D3 5000 IU 100 caps by Klaire Labs/SFI Health
Klaire LabsMost people don't obtain sufficient amounts of necessary Vitamin D by their exposure to natural sunlight. Vitamin D3 5000 IU by Klaire Labs is desi...
View full detailsVitamin D 5,000 IU 100 tablets by Douglas Labs
Douglas LabsVitamin D 5,000 IU from Douglas Labs is a dietary supplement designed to promote optimal bone health. Vitamin D 5,000 IU features the vitamin that ...
View full detailsD3 1000 180 softgels by NutriDyn
NutriDynNutriDyn's D3 1000 provides 25 mcg (1,000 IU) of vitamin D3 per softgel. Vitamin D3 is a fat-soluble vitamin that is important for many bodily func...
View full detailsK2-D3 10,000 by Xymogen
XymogenK2-D3 10,000 by Xymogen combines Vitamin K2 (as MK-7, the most bioavailable and bioactive form) with 10,000 IU of Vitamin D3 — two nutrients that w...
View full detailsVitamin D-1000/Preservative Free 90 Capsules by Thorne Research
Thorne ResearchVitamin D-1000 by Thorne Research is a professional health supplement product which features Vitamin D for promoting optimal health benefits. Vitam...
View full detailsVitamin D3-K2 Emulsion 1 fl oz by BioGenesis
BioGenesisVitamin D3-K2 Emulsion by BioGenesis contains natural forms of vitamins D3 and K that are mixed with a berry-tasting liquid to create a pleasant ta...
View full detailsVitamin D3 Liquid 22.5 ml by Pure Encapsulations
Pure EncapsulationsVitamin D3 Liquid by Pure Encapsulations is a dietary supplement designed to support healthy colon, cardiovascular, bone, breast, prostate and immu...
View full detailsVitamin D3 10,000 IU by Pure Encapsulations
Pure EncapsulationsVitamin D3 10,000 IU by Pure Encapsulations provides vitamin D3 as cholecalciferol. Vitamin D3 supports normal calcium and phosphorus absorption.* ...
View full detailsVitamin D3 5000 IU 120 softgels by Nordic Naturals
Nordic NaturalsBy helping the body absorb calcium, Vitamin D is essential for the body to grow and maintain strong bones. In addition to its primary role in bone ...
View full detailsD3 5000 by Xymogen
XymogenD3 5000 by Xymogen is a dietary supplement providing 5,000 IU of vitamin D3 (cholecalciferol) per softgel — formulated to support normal bone healt...
View full detailsVitamin D3 + K2 60 Gummies by Nordic Naturals
Nordic NaturalsMaintaining an active lifestyle requires strong, healthy bones and a robust immune system. Vitamin D3 + K2 60 gummies by Nordic Naturals provides a...
View full detailsVitamin D3 2000 IU 90 capsules by Vital Nutrients
Vital NutrientsVitamin D3 2,000 IU by Vital Nutrients is a high quality vitamin supplement which is designed to help with promoting optimal bone health and intest...
View full detailsK2 MK-7 & D3 60 capsules by Protocol for Life Balance
Protocol For Life BalanceMaintaining an active lifestyle as you transition into your senior years requires healthy bones, joints, and veins. Vitamin K2 and D3 make the perf...
View full detailsAbout Vitamin D
Vitamin D supports calcium absorption, bone and teeth health, muscle function and normal immune function. Your skin makes vitamin D from sunlight, but season, latitude, sunscreen and time spent indoors mean many people get less than they need, especially during winter.
Vitamin D supplements come in several strengths and formats. Here is how to compare them.
How to Choose a Vitamin D Supplement
- Vitamin D3 vs D2: Vitamin D3 (cholecalciferol) is the form your skin makes and the form used in most practitioner supplements. Vegan D3 made from lichen is also available.
- D3 with K2: Vitamin K2 helps direct calcium into bones, so many people prefer a combined product. See our vitamin K collection.
- Strength: Products range from 1,000 IU to 10,000 IU per serving. Higher strengths are generally intended for use under a practitioner's guidance.
- Format: Softgels and capsules are convenient, while liquid drops and emulsions make it easy to adjust the dose and work well for children.
Vitamin D works hand in hand with calcium and magnesium, which your body needs to activate vitamin D. Explore bone health and immune support for complementary products.
Frequently Asked Questions
Should I take vitamin D3 or D2?
Most people choose vitamin D3. D3 is the same form your body makes from sunlight, and it is the form found in most of the products we carry. Lichen-based D3 is an option for those who avoid animal sources.
How much vitamin D should I take?
The RDA is 600 IU per day for most adults and 800 IU for adults over 70. The National Institutes of Health sets the adult upper limit at 4,000 IU per day unless a practitioner recommends more. Many practitioners test 25-hydroxy vitamin D levels to personalize the dose, which is why higher-strength products are available.
Why is vitamin D often combined with K2?
Vitamin K2 helps direct calcium to bones and teeth. Because vitamin D increases calcium absorption, many practitioners pair it with K2. If you take a blood-thinning medication, talk to your practitioner before adding vitamin K.
When is the best time to take vitamin D?
Take it with a meal that contains some fat. Vitamin D is fat soluble, so it absorbs better alongside food. Many people take it with breakfast or lunch to make it part of their routine.
Is liquid vitamin D better than capsules?
Both work well. Liquids are easy to dose for kids or for adjusting your intake, while softgels and capsules are convenient for travel. Choose the format you will take consistently.
Related categories: Vitamin K | Calcium | Bone Health | Magnesium | Immune Support | Multivitamins
*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.