What’s the best way to make sure you’re getting enough vitamin D? Consistently getting a healthy amount of sunlight and eating more vitamin D-rich foods will do the trick, but most people will also benefit from taking a vitamin D supplement.
Not only is vitamin D crucial for strong, healthy bones, it’s also linked to a slew of other health benefits, including a lower risk of cardiovascular disease and cancer. Recent research has also suggested a connection between vitamin D and a wide range of health benefits, from a reduction in acne to an improvement in cognitive performance.
But one of the biggest obstacles is knowing which vitamin D supplements are the best. There are countless options on the market — everything from pills and gummies to chewables and liquid drops — and many of them are packed with unnecessary fillers and binders.
Here are our top picks for the best vitamin D supplements.
Our Editor’s Best Vitamin D Supplements Reviews
- Immune, muscle, teeth and bone health support supplement: contains one 300 count bottle of Nature Made Vitamin D3 1000 IU (25 mcg) Softgels for a 300-day supply
- Nature Made Vitamin D 1000 IU softgels support bone health, teeth health, muscle health, and provide immune support
- These Vitamin D 1000IU softgels help improve calcium absorption and contain 25mcg of Vitamin D 3, the body’s preferred form of Vitamin D
- Adults, take one Vitamin D3 softgel daily with water and a meal
- Sourced from high-quality ingredients, this Nature Made Vitamin D3 supplement has no color added and no artificial flavors
- 𝗩𝗜𝗧𝗔𝗠𝗜𝗡 𝗗𝟯 𝗪𝗜𝗧𝗛 𝗞𝟮 – Our vitamin K2 and D3 with magnesium is made up of 10,000 IU of vitamin D3 and 100 mcg of vitamin K2. It also includes a unique blend of vitamin B6, zinc, magnesium, MCT oil, and ox bile you won't find in other formulas – Includes a 120-day supply.
- 𝗦𝗠𝗔𝗥𝗧 𝗦𝗬𝗡𝗘𝗥𝗚𝗬 – Our D3 + K2 vitamin supplement goes beyond the typical combo. Formulated with vitamin D3 with MK‑7 vitamin K2, it includes essential cofactors like magnesium, B6, and zinc to help your body absorb, activate, and properly use vitamin D. It’s not just what you take—it’s what your body can use.
- 𝗘𝗡𝗛𝗔𝗡𝗖𝗘𝗗 𝗔𝗕𝗦𝗢𝗥𝗣𝗧𝗜𝗢𝗡 – Our powerful K2 D3 vitamin supplement contains fat-soluble vitamins that require dietary fat for proper absorption. MCT powder, a healthy fat source, enhances the bioavailability of vitamin D with K2, allowing your body to absorb and utilize these essential nutrients more efficiently.
- 𝗙𝗢𝗥𝗠𝗨𝗟𝗔𝗧𝗘𝗗 𝗜𝗡 𝗧𝗛𝗘 𝗨𝗦𝗔 – Our vitamin D3 + K2 is thoughtfully developed in the United States and made in cGMP-certified facilities under strict quality standards. Crafted with care in every D3 K2 vitamin 10,000 IU batch to ensure purity, potency, and consistency you can trust.
- 𝗧𝗥𝗬 𝗙𝗢𝗥 𝟯𝟬 𝗗𝗔𝗬𝗦 - If you are unhappy with this product, reach out to us within 30 days of your purchase date and we will take care of you.
- Immune, muscle, teeth and bone health support supplement: contains one 250 count bottle of Nature Made Vitamin D3 2000 IU (50 mcg) Softgels for a 250-day supply
- Nature Made Vitamin D 2000 IU softgels support bone health, teeth health, muscle health, and provide immune support
- These Vitamin D 2000IU softgels help improve calcium absorption and contain 50mcg of Vitamin D 3, the body’s preferred form of Vitamin D
- Helps slow biological aging of cells; In a clinical study, taking 2000 IU vitamin D3 supplements for 4 years helped prevent leukocyte telomere shortening, preventing the equivalent of approx 3 years of cellular aging compared with placebo in older adults
- Adults, take one Vitamin D3 softgel daily with water and a meal
- D3 + K2 – TEAMWORK THAT MATTERS: Vitamins D3 and K2 work synergistically to support strong bones, immune health, and proper calcium metabolism.* D3 helps your body absorb calcium, while K2 (as MK-7) guides it to the bones where it belongs.* Together, they form a powerful combo for total-body wellness.*
- PLANT-BASED, VEGAN-FRIENDLY FORMULA: Our D3 + K2 supplement uses vegan D3 (cholecalciferol) sourced from lichen and K2 (MK-7) derived from fermented chickpeas, with coconut MCT oil added to support optimal nutrient absorption.* No animal ingredients, ever—just effective, science-backed support.*
- ONCE-A-DAY IMMUNE & BONE SUPPORT: Each easy-to-swallow softgel delivers 125 mcg (5000 IU) of vegan D3 and 100 mcg of K2 (MK-7)—the most bioavailable form of K2. Just one softgel per day helps promote bone health, immune support, and cardiovascular health in both women and men.*
- CERTIFIED CLEAN & QUALITY TESTED: Our vitamin D3 and K2 formula is Vegan Certified, Non-GMO Project Verified, and free of carrageenan, gluten, soy, and artificial fillers. Each batch is 3rd-party tested and manufactured in the USA in a cGMP-compliant facility—because your health deserves the highest standard.
- NUTRITION YOU CAN TRUST: At Sports Research, we craft supplements with ingredients you recognize and results you can feel. Our D3 + K2 softgels deliver plant-based purity, clinical strength, and real transparency, helping you live brighter every day—naturally.*
- Vitamin D3 Benefits: Supports healthy teeth and bones by enhancing the absorption of calcium; supports immune function and cardiovascular health*
- Optimal Absorption: Vitamin D3 (as cholecalciferol) is more potent and better absorbed than vitamin D2 (or ergocalciferol); research shows vitamin D3 is more effective at raising overall vitamin D levels*
- Essential Vitamin D: Optimizes performance, muscle strength and mass, and cellular repair, especially for those who work indoors or lack adequate sun exposure to support the body's natural vitamin D production*
- Third-Party Certified: This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants
- Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)
- Bone Health: Vitamin D3 supports calcium absorption and retention to support optimal bone health; this vitamin D supplement supports bone strength*
- Breast, Colon & Immune Support: Vitamin D3 supports colon and breast health by aiding blood vessel function, immune cell activity, and healthy cell metabolism*
- Immune Support Supplement: These D3 vitamins bind to receptors on immune cells, including lymphocytes and macrophages, supporting healthy immune function*
- Supports Heart Health: This D3 supplement supports cardiovascular health and brain health, as well as immune cell activation*
- Pure Difference: What we leave out matters, too; Pure Encapsulations products are free from common allergens, artificial or unnecessary ingredients, and GMOs
- Supports Bone Strength: Pure Encapsulations Vitamin D3 & K2 helps maintain strong bones by aiding healthy calcium absorption and utilization*
- Vascular Health Support: Vitamin K2 works with D3 to support arterial flexibility and healthy calcium distribution in blood vessels*
- Immune Function Support: Delivers 4,000 IU of vitamin D3 to help support the immune system and seasonal wellness*
- Pure Quality: Made with premium ingredients sourced from trusted suppliers, our Vitamin D3 & K2 capsules are carefully manufactured and tested for purity and potency
- Pure Difference: What we leave out matters, too; Pure Encapsulations products are free from common allergens, artificial or unnecessary ingredients, and GMOs
- Strong bone support supplement: contains one 30 count bottle of Nature Made Vitamin D3 K2 Softgels for a 30-day supply
- Nature Made Vitamin D3 and K2 softgels provide 5000 IU (125 mcg) of Vitamin D for immune support and to support healthy aging, bone health, teeth health and muscle health
- Provides 100 mcg of Vitamin K2 to support healthy artery function; Adding K2 to D3 helps direct calcium to bones
- Adults, take one of these D3 and K2 softgels daily with water; Designed for those with higher Vitamin D needs and/or deficiency, as determined by a healthcare professional(1)
- Made in the USA with quality global ingredients, these gluten free Vitamin K2 D3 softgels contain no synthetic dyes and no artificial flavors
- Liquid Vitamin K2 D3 with Omega-3: Each 1 ml serving contains Vitamin D3 (as Cholecalciferol) 125 mcg (5000 IU), Vitamin K2 (as MK-4 & MK-7) 120 mcg, Omega-3 (Alpha Linolenic Acid) 250 mg, and a blend of Organic Chia Seed Oil, MCT Oil, and Olive Oil.
- Daily Wellness in Every Drop: Our Vitamin D3 K2 liquid drops support bone health, muscle function, and immune health as part of a daily wellness routine — in every serving.
- Convenient Liquid Format: A 4-in-1 liquid supplement in an easy-to-use dropper. No capsules, no pills — simply add 1 ml to water, juice, or take directly.
- Certified Organic Vitamin D Liquid: Our D3 K2 drops contain no fillers, are non-GMO, USDA Organic certified, and proudly USA-made with global ingredients.
- 4-in-1 Daily Supplement: Each bottle provides 30 servings of Vitamin D3, K2, Omega-3, and MCT Oil. If you're unhappy with your purchase, just reach out to us.
- Vitamin D3 Benefits: Supports healthy teeth and bones by enhancing the absorption of calcium; supports immune function and cardiovascular health*
- Optimal Absorption: Vitamin D3 (as cholecalciferol) is more potent and better absorbed than vitamin D2 (or ergocalciferol); research shows vitamin D3 is more effective at raising overall vitamin D levels*
- Vitamin D for Performance: Optimizes muscle strength and cellular repair, especially in athletes who train indoors or lack adequate sun exposure to support the body's natural vitamin D production*
- NSF Certified for Sport: Tested for compliance with label claims and to ensure the absence of nearly 300 substances banned by many major athletic organizations
- Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)
Best Vitamin D Supplements Buying Guide
Before choosing the best vitamin D supplement you should consider following options:
1. Vitamin D3 vs. Vitamin D2: The most common form of vitamin D is D3, also known as cholecalciferol. It is produced in the skin upon exposure to sunlight.
Vitamin D2 is a form of vitamin D that’s mostly produced from irradiated yeast or from fish or fungus extracts.
According to Dr. Michael F. Holick, a professor of medicine, physiology and biophysics at Boston University Medical Center and one of the world’s leading experts on vitamin D, there’s no real difference between vitamin D3 and D2.
“The distinction is artificial,” says Dr. Holick. “The only difference is that D2 is typically used in supplements in India, whereas D3 is used in supplements in the rest of the world.”
2. Calcidiol vs. Calcitriol: Vitamin D is ultimately converted into either calcidiol (also known as 25-hydroxyvitamin D) or calcitriol (1,25 dihydroxyvitamin D). Calcidiol is the inactive form of vitamin D, while calcitriol is the active form.
According to Dr. Holick, “the majority of doctors will measure and treat based on calcidiol levels, because most people will convert calcidiol to calcitriol.”
3. Vitamin D3 in High-Dose vs. Low-Dose: Vitamin D3 supplements are available in high- and low-dose forms. High-dose vitamin D3 supplements contain a higher amount of vitamin D3 and are generally used for treating vitamin D deficiency or for increasing bone health.
Low-dose vitamin D3 supplements contain a smaller amount of vitamin D3 and are generally used for supporting overall health.
4. Vitamin D3 in Capsule vs. Liquid: Vitamin D3 supplements are available in capsule and liquid forms. Capsule forms are most common, but some people may prefer liquid forms.
Liquid forms may be easier to swallow and absorb. Some people may also prefer liquid forms because they can add the liquid form to their smoothie or juice, says Dr. Holick.
5. Vitamin D3 in High-Potency vs. Low-Potency: Vitamin D3 supplements are available in different potencies. High-potency forms contain between 2000 and 5000 IU of vitamin D3 per capsule or teaspoon.
Low-potency forms contain between 400 and 1000 IU. “If you take a higher dose, you will get the appropriate amount of vitamin D3 faster,” says Dr. Holick.
But taking a high dose of vitamin D3 may cause a “fishy” odor in your sweat and urine, says Dr. Holick. “This is harmless and will go away as your body adjusts to the higher dose.”
What else you should know about vitamin d supplements
1. What are the benefits of taking vitamin D supplements?
There are many potential benefits of taking vitamin D supplements, including improved bone health, reduced inflammation, and a lower risk of developing certain types of cancer.
2. What are the risks of taking vitamin D supplements?
The risks of taking vitamin D supplements are that you may get too much vitamin D, which can lead to health problems.
3. What is the optimal dose of vitamin D to take?
There is no definitive answer to this question as the optimal dose of vitamin D may vary depending on individual factors such as age, health status, and sun exposure. However, many experts recommend a daily dose of 400-800 IU (10-20 micrograms) of vitamin D for adults.
4. Are there any interactions between vitamin D supplements and other medications?
There are no known drug interactions between vitamin D and other medications.
5. Are there any side effects of taking vitamin D supplements?
The most common side effect of taking too much vitamin D is a feeling of sickness (nausea). You may also experience a loss of appetite, constipation, and weight loss. In rare cases, too much vitamin D can lead to more serious problems like kidney stones and bone pain.
Conclusion
On the market, there are numerous best vitamin d supplements. Hopefully, the list of the top ten best vitamin d supplements will save you time researching and deciding on the best one for you.