10 Best Vitamin D3 Supplements 2021

What Is Vitamin D?

Vitamin D is a fat-soluble vitamin, meaning that it dissolves in fats and oils and can be stored in your body for a long time.

Two main dietary forms exist (Trusted Source):
  • Vitamin D3 (cholecalciferol). Found in some animal foods, like fatty fish and egg yolks.
  • Vitamin D2 (ergocalciferol). Found in some plants, mushrooms, and yeasts.

What is Vitamin D Good For?

Vitamin D helps keep you bones strong by aiding in the absorption of calcium and phosphorus. It's involved in maintaining a healthy immune system, mood regulation, heart health, and even weight loss. 

What is the Best Form of Vitamin D?

Of the two, D3 (cholecalciferol) seems to be almost twice as effective at increasing blood levels of vitamin D as D2 (ergocalciferol) (Trusted SourceTrusted Source).

Several publications and studies have suggested that maintaining adequate levels of vitamin D would seem potentially beneficial in fighting the COVID-19 infection.

What is the Best Strength of Vitamin D to Take?

Consuming 400–800 IU (10–20 mcg) of vitamin D should meet the needs of 97–98% of healthy people. However, several studies show that taking more than this is linked to greater
health benefits.

These research implies that consuming 1,000–4,000 IU (25–100 mcg) of vitamin D daily should be ideal for most people to reach healthy vitamin D blood levels.

However, don’t consume more than 4,000 IU of vitamin D without your doctor’s permission. It exceeds the safe upper limits of intake and is not linked to more health benefits

Best Vitamin D3 Supplement Brands in 2021

If you are looking for the best vitamin D3 supplement, we have done our research and shortlisted the best for you. The list is based on recommendations by third party organizations, online reviews and popularity on search results and forums.

Here are the best vitamin D3 supplements that you can buy today.

1. Nordic Naturals Vitamin D3 Gummies, Wild Berry

-120 Gummies / 120 Servings
- Great Taste 
- Healthy Bones, Mood & Immune System Function 
- Non-GMO 

- These delicious gummies are made with cholecalciferol, the natural form of vitamin D preferred for optimal absorption. 
- Nordic Naturals Vitamin D3 Gummies provide 25 mcg (1000 I.U.) of vitamin D in each serving. 
- Nordic Naturals Vitamin D3 Gummies comes in a delicious, natural wild berry flavor. 
- Pectin based and gelatin free, these gummies contain no artificial coloring, flavoring, or preservatives. - Gluten and dairy free.
- Non-GMO Verified

Dosage : 1000 IU

These gummies are SO good, it’s hard limiting yourself to one a day. I noticed such a health difference as well. I normally have constant colds and I didn’t have any while on these.

4.8 out of 5 - more than 2,500 global ratings

2. Carlyle Chewable Vitamin D3

- 180 Count 
- Natural Berry Flavor 
- Vegetarian, Non-GMO and Gluten Free, Wheat, Yeast, Milk, Lactose and Soy free
- 180 tablets
- Delicious natural berry flavor
- Vitamin D3 is also known as cholecalciferol
- Our Vitamin D3 product is Free of Artificial Color, Artificial Flavor, Artificial Sweetener and No Preservatives.

Dosage : 2000 IU per serving

My daughter has to take Vitamin D3 supplements because of a medical condition. Because Carlyle D3 has 2000 IU's of D3 per tiny, tasty, chewable tablet, taking her recommended 4000 daily IU's is no longer a hassle, and her blood levels of D are perfect, so we know she is absorbing it.

4.7 out of 5 - more than 800 global ratings

3. Vega Sport Pro Vitamin D

Buy on Amazon

- 60 Capsules 
- NSF Certified, Certified Vegan, Gluten Free Pills
- All Vega Sport Pro supplements are NSF Certified for Sport. That means the product and label have undergone rigorous testing to verify products, making sure the labels accurate reflect what’s inside the product. 
- Vega Sport Pro supplements are Certified Vegan by Vegan Action
- Each bottle includes 60 gluten free vegetarian capsules with 1000 IUs each. 60 day supply. Take 1 capsule daily, with or without food

Dosage - 1000 IU

The Vitamin D pills are easily to swallow, or you can open them up easily to add to your morning smoothie! Living up in the PNW, we don't get a lot of vitamin D from sunshine, especially working in an office all day. Supplementing Vitamin D with a vegan source supports my lifestyle and keeps me healthy throughout the year... assuming that I'll continue to use these pills into the winter, which I plan on doing! 

4.5 out of 5 - more than 200 global ratings

4. Carlson Super Daily Vitamin D3 Drops

- 1-Year Supply
- Vitamin D3 Liquid
- Heart & Immune Health
- Vegetarian, Liquid Vitamin D Drops, Unflavored
- 365 Drops

- A single drop provides 2,000 IU (50 mcg) of vitamin D3 as cholecalciferol. Place a drop in your food, drink or directly on your tongue.
- All Carlson products are tested by an FDA-registered laboratory for potency and quality.

Dosage : 2000 IU per drop

Near the end of my second trimester, my Vitamin D dropped to a very concerning deficiency. My OB ordered that I start taking a supplement of 2000 ius, but I have never been able to take any sort of oral vitamins without getting sick, and being pregnant has made that much worse. I tried the gummies and nothing was working. 
Finally a friend with similar issues recommended this to me, I talked it over with my doctor and he suggested I use it by placing one drop in the daily bottle of ensure I was drinking to help make up for the fact that I couldn't take prenatals. I was hesitant the first day, and kept a close eye on myself as the maximum I was able to tolerate before was only 1000 ius. I did as the doctor suggested, placed one drop in the ensure, shook and drank it as usual. 
My vitamin D levels are now recovering at an excellent rate, and I haven't had any stomach issues what so ever. 

4.6 out of 5 - more than 450 global ratings

5. Dr. Mercola Liposomal Vitamin D3

  • Unlike many other vitamin D supplements that are often the inferior D2 form, ergocalciferol, our Liposomal Vitamin D3 is the preferred form – vitamin D3, cholecalciferol.
  • Our formula contains phospholipids from sunflower lecithin that create liposomes in your gastrointestinal tract to help the vitamin D3 molecules gain entry across your gut membrane to its target organs and cells.*
  • They are packed in tightly sealed Licaps® hard-shelled capsules rather than oxygen-permeable soft gels to help avoid leakage and to maintain freshness.
*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.

Amazon Ratings: 4.8 out of 5 - more than 550 ratings.

Related Products for Immune Support:

6. Now Foods Vitamin D3 & K2 (120 Veg Caps)

  • Also has 3 mg of vitamin C per veg capsule
  • Supports Bone Health
  • Plus Cardiovascular Support
  • Non-GMO
  • Family Owned Since 1968
  • GMP Quality Assured
Dosage - 1,000 IU (D3 / K2)

Ordering second bottle now! Started take 2000mg along with magnesium. Hair loss stopped. No more mood Swings and no longer tired.

4.8 out of 5 - more than 4,500 global ratings

Note: Most of the Top 10 Vitamin D supplements as listed on the Amazon Best Sellers have dosages that exceed the maximum recommended dose (In USA and UK) of Vitamin D of 4,000 IU. Most of the brands also come in multiple dosages. Do check the label before you purchase.

7. Vitamin D by Nature’s Bounty for Immune Support

Price: $17.10 > Check Price on Amazon

More than 14,000 customer reviews and a 4.8 out of 5 overall rating on Amazon. #3 in Vitamin D Supplements of Amazon Best Sellers.
  • Immune support: 350-count, 2,000 IU Vitamin D3 Softgels for immune health. Vitamin D by Nature’s Bounty may assist the immune system by helping to regulate T and B-lymphocytes. Vitamin D3 is a more potent form of Vitamin D.
  • Strong, healthy bones: In addition to immune support, getting a sufficient amount of Vitamin D is critical to building and maintaining strong bones in adults. It is essential for calcium absorption to help support healthy bones. Nature’s Bounty Vitamin D3 Softgels supplement the Vitamin D your body needs for overall health.
  • Year-round support: Vitamin D3 supplements by Nature’s Bounty contain the same form of Vitamin D that is naturally formed in the body through exposure to sunshine. Nature’s Bounty Vitamin D3 helps replicate the benefits of natural sunshine all year long.
  • Purity is our priority: Nature’s Bounty is committed to safety and purity in all our supplements. Our rapid release Vitamin D3 Softgels are non-GMO, gluten- and sugar-free, and contain no artificial colors, or sweeteners.
  • From the trusted wellness experts: Nature’s Bounty Vitamin D supplements are a product of 50 years of dedication to quality, consistency and scientific research to make vitamins and nutritional supplements of unrivaled excellence.
Vitamin D by Nature's Bounty also come in various other dosages:

8. NOW Foods Chewable Vitamin D3 5,000 IU - Best Chewable


Dosage: 1 chewable tablet contains 5,000 IU of D3
Price: From $13.68

Some people prefer chewable vitamins over capsules, liquids, gummies, and pills. Yet, most chewables contain added sugar.

Unlike other chewable vitamin D supplements, NOW’s Chewable Vitamin D3 5,000 IU is sweetened with xylitol and sorbitol — two sugar alcohols — and natural vanilla and peppermint flavors, making it an excellent choice.

Note that sugar alcohols can cause digestive problems, such as stomach upset and diarrhea, especially when consumed in large amounts. Also, this supplement is held together with cellulose, making it less absorbable than oil-based capsules.

9. Vitamin K2 + D3 with Organic Virgin Coconut Oil | Vegan D3 (5000iu) with MK7 Vitamin K2 (100mcg) from Chickpea | Non-GMO & Vegan Certified (60 Veggie Softgels)

  • Contains 5000 IU (125mcg) of Vegan Vitamin D3 & 100 mcg of Vitamin K2 as MK-7
  • Made with Vitashine D3 - a patent, plant based form of Vitamin D3 from Lichen and MenaQ7 - a patent form of MK7 from Chickpea
  • 100% Plant based - Vegan Certified & Non-Gmo Verified. Soy, Gluten, Gelatin & Carrageenan free
  • Formulated with Organic Coconut Oil - Note: Capsules may appear 'cloudy' due to the Coconut Oil

10. Vitamin K2 (MK7) with D3 Supplement - Bronson

  • The Perfect Pair: Vitamins K2 & D3 were simply meant to be together. Most people know the benefits of Vitamin D, but many don’t realize that Vitamin D NEEDS Vitamin K2 to maximize it’s benefits.
  • Strong Bones & Healthy Heart: This formula not only promotes the proper absorption of calcium with D3, but the correct distribution to your bones where you need it most.
  • Superior Quality Vegetarian Capsules: Laboratory tested, NON-GMO, GLUTEN FREE, & SOY FREE. All Bronson products are tested in our state-of-the-art facility in New York.
  • Trusted Since 1960: The pioneers of Bronson Vitamins were a group of pharmacists who witnessed the benefits of vitamins and mineral supplementation firsthand with their patients. Bronson Vitamins have been consistently mentioned by top medical professionals since our inception in 1960.
  • 5000 IU Vitamin D3 & 90 mcg MK-7 Vitamin K2, 250 Capsules

What is the Best Vitamin D Foods?

Here is the vitamin D3 content of a few of the best food sources (nih.gov):
FoodAmount% RDI
Cod liver oil, 1 tablespoon (15 ml)1,360 IU / 34 mcg227%
Salmon, cooked, 3 ounces (85 grams)447 IU / 11 mcg75%
Tuna, canned in water, 3 ounces (85 grams)154 IU / 4 mcg26%
Beef liver, cooked, 3 ounces (85 grams)42 IU / 1 mcg7%
1 large whole egg (D is found in yolk)41 IU / 1 mcg7%
1 sardine, canned in oil, drained23 IU / 0.6 mcg4%
Although fatty fish like salmon, mackerel, swordfish, trout, tuna, and sardines are decent sources, you would have to eat them almost every day to get enough.

The only excellent dietary source of vitamin D is fish liver oil — such as cod liver oil — which contains upwards of two times the Reference Daily Intake (RDI) in a single tablespoon (15 ml).

Keep in mind that dairy products and cereals are often fortified with vitamin D (Trusted Source).

Some rare mushrooms also harbor vitamin D, and egg yolks contain small amounts.



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