BestPicks

Best Vitamin D Supplement on iHerb (2026): 8 Best Sellers Compared by Label

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If you are searching for the best vitamin D supplement on iHerb, this page does not pick a winner. It lines up 8 vitamin D products from iHerb's US store (Vitamin D category, Best sellers sort), some with vitamin K2, and copies what the label says: the vitamin D amount and %Daily Value per serving, the form (capsule, softgel or drops), the serving size, servings per container, other ingredients and label cautions, plus the US price we saw on 2026-11-04. Products come from the front of the Best sellers list; the same product in different pack sizes is merged, and no more than 3 products per brand are included. We have not tested any product, we make no health claims, and the order is not a quality ranking. Supplements do not replace medical care.

How to choose

Quick summary

  1. 1. NOW Foods Vitamin D3 & K2, 120 CapsulesUS$8.92 on iHerb USA one-capsule serving with 25 mcg (1,000 IU) vitamin D3 plus 45 mcg vitamin K2 as MK-4, 120 servings per bottle.
  2. 2. California Gold Nutrition Vitamin D3 + K2 as MK-7, 180 Veggie CapsulesUS$16.20 on iHerb USA one-capsule serving with 125 mcg (5,000 IU) vitamin D3 plus 120 mcg vitamin K2 as MK-7, 180 servings per bottle.
  3. 3. California Gold Nutrition Vitamin D3, 125 mcg (5,000 IU), 90 Fish Gelatin SoftgelsUS$6.07 on iHerb USA one-softgel serving with 125 mcg (5,000 IU) vitamin D3 in a fish gelatin softgel, 90 servings per bottle.
  4. 4. NOW Foods Vitamin D-3, 125 mcg (5,000 IU), 120 SoftgelsUS$6.13 on iHerb USA one-softgel serving with 125 mcg (5,000 IU) vitamin D3 in a bovine gelatin softgel, 120 servings per bottle.
  5. 5. California Gold Nutrition Vitamin D3, 50 mcg (2,000 IU), 90 Fish Gelatin SoftgelsUS$4.92 on iHerb USA one-softgel serving with 50 mcg (2,000 IU) vitamin D3 in a fish gelatin softgel, 90 servings per bottle.
  6. 6. NOW Foods Vitamin D3, 2,000 IU, 120 SoftgelsUS$5.18 on iHerb USA one-softgel serving with 50 mcg (2,000 IU) vitamin D3 in a bovine gelatin softgel, 120 servings per bottle.
  7. 7. Thorne Vitamin D + K2, 1 fl oz (30 ml)US$34.00 on iHerb USLiquid drops with 25 mcg (1,000 IU) vitamin D3 and 200 mcg vitamin K per 2-drop serving, 600 servings per bottle.
  8. 8. Sports Research D3 + K2, Plant-Based, 125 mcg/100 mcg, 60 Veggie SoftgelsUS$25.97 on iHerb USA one-softgel serving with 125 mcg (5,000 IU) vitamin D3 plus 100 mcg vitamin K2 as MK-7 in a plant-based softgel, 60 servings per bottle.

Products

1. NOW Foods Vitamin D3 & K2, 120 Capsules (NOW Foods)

Price: US$8.92 on iHerb US (checked 2026-11-04); iHerb shows US$0.07/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (hypromellose)
Serving size
1 capsule
Servings per container
120
Vitamin D per serving
25 mcg (1,000 IU), 125% DV
Vitamin K2 per serving
Vitamin K2 as menaquinone-4 (MK-4): 45 mcg, DV not established
Source wording on label
Vitamin D as D3 cholecalciferol (from lanolin)
Suggested use on label
Label suggests 1 capsule 1 to 2 times daily with food
Other ingredients
Rice flour, hypromellose capsule, ascorbyl palmitate, silicon dioxide
Label cautions
For adults only; label says to consult a physician if pregnant or nursing, taking any medication or with a medical condition, and it has precautions about specific medication types, so ask a doctor or pharmacist; keep out of reach of children.
iHerb listing
Product code NOW-00369; first listed on iHerb 05/2008; iHerb shows 82,009 reviews (a count, not a quality measure)
Pros
  • One capsule per serving
  • Contains no gelatin per the other-ingredients list
  • iHerb shows US$0.07/serving
Cons
  • Label has precautions about specific medication types; ask a doctor or pharmacist if you take any medication

Best for: A one-capsule serving with 25 mcg (1,000 IU) vitamin D3 plus 45 mcg vitamin K2 as MK-4, 120 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

2. California Gold Nutrition Vitamin D3 + K2 as MK-7, 180 Veggie Capsules (California Gold Nutrition)

Price: US$16.20 on iHerb US (checked 2026-11-04); iHerb shows US$0.09/serving. Prices and promotions differ by country, so the checkout page is final

Form
Capsule (veggie)
Serving size
1 capsule
Servings per container
180
Vitamin D per serving
125 mcg (5,000 IU), 625% DV
Vitamin K2 per serving
Vitamin K2 as menaquinone-7 (MK-7): 120 mcg, DV not established
Source wording on label
Vitamin D as D3 cholecalciferol
Suggested use on label
Label suggests 1 capsule daily, with food
Other ingredients
Microcrystalline cellulose, hypromellose veggie capsule, magnesium stearate, dicalcium phosphate, silicon dioxide, MCT oil
Label cautions
Keep out of reach of children; label says pregnant or lactating women, people under 18, those taking prescription medications and those with a medical condition should consult a healthcare professional first; it has precautions about specific medication types, so ask a doctor or pharmacist.
iHerb listing
Product code CGN-02333; first listed on iHerb 11/2023; iHerb shows 41,248 reviews (a count, not a quality measure)
Pros
  • One capsule per serving
  • Veggie capsule
  • 180 servings per bottle
  • iHerb shows US$0.09/serving
Cons
  • Label has precautions about specific medication types; ask a doctor or pharmacist if you take any medication

Best for: A one-capsule serving with 125 mcg (5,000 IU) vitamin D3 plus 120 mcg vitamin K2 as MK-7, 180 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

3. California Gold Nutrition Vitamin D3, 125 mcg (5,000 IU), 90 Fish Gelatin Softgels (California Gold Nutrition)

Price: US$6.07 on iHerb US (checked 2026-11-04); iHerb shows US$0.07/serving. Prices and promotions differ by country, so the checkout page is final

Form
Softgel (fish gelatin)
Serving size
1 softgel
Servings per container
90
Vitamin D per serving
125 mcg (5,000 IU), 625% DV
Source wording on label
Vitamin D as D3 cholecalciferol; the label states it contains fish (tilapia)
Suggested use on label
Label suggests 1 softgel daily, with food; the label says not to exceed one softgel daily or take it with other supplements containing vitamin D
Other ingredients
Safflower oil, fish gelatin softgel (gelatin, vegetable glycerin, purified water); contains fish (tilapia)
Label cautions
Keep out of reach of children; the label describes this as a high-potency vitamin D product and advises consulting a licensed physician, pharmacist or other qualified professional first if you are pregnant, nursing, taking prescription medications or have a diagnosed medical condition.
iHerb listing
Product code CGN-01065; first listed on iHerb 09/2016; iHerb shows 324,921 reviews (a count, not a quality measure)
Pros
  • One softgel per serving
  • iHerb shows US$0.07/serving
Cons
  • Label states it contains fish (tilapia)

Best for: A one-softgel serving with 125 mcg (5,000 IU) vitamin D3 in a fish gelatin softgel, 90 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

4. NOW Foods Vitamin D-3, 125 mcg (5,000 IU), 120 Softgels (NOW Foods)

Price: US$6.13 on iHerb US (checked 2026-11-04); iHerb shows US$0.05/serving. Prices and promotions differ by country, so the checkout page is final

Form
Softgel (bovine gelatin)
Serving size
1 softgel
Servings per container
120
Vitamin D per serving
125 mcg (5,000 IU), 625% DV
Source wording on label
Vitamin D as D3 cholecalciferol (from lanolin)
Suggested use on label
Label suggests 1 softgel daily with a fat-containing meal, or as directed by your healthcare practitioner
Other ingredients
Extra virgin olive oil, softgel capsule (bovine gelatin, glycerin, water), safflower oil
Label cautions
For adults only; do not exceed the recommended dose; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition, and it has precautions about specific medication types and conditions, so ask a doctor or pharmacist; keep out of reach of children.
iHerb listing
Product code NOW-00372; first listed on iHerb 09/2008; iHerb shows 277,525 reviews (a count, not a quality measure)
Pros
  • One softgel per serving
  • 120 servings per bottle
  • iHerb shows US$0.05/serving
Cons
  • Softgel shell is bovine gelatin

Best for: A one-softgel serving with 125 mcg (5,000 IU) vitamin D3 in a bovine gelatin softgel, 120 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

5. California Gold Nutrition Vitamin D3, 50 mcg (2,000 IU), 90 Fish Gelatin Softgels (California Gold Nutrition)

Price: US$4.92 on iHerb US (checked 2026-11-04); iHerb shows US$0.05/serving. Prices and promotions differ by country, so the checkout page is final

Form
Softgel (fish gelatin)
Serving size
1 softgel
Servings per container
90
Vitamin D per serving
50 mcg (2,000 IU), 250% DV
Source wording on label
Vitamin D as D3 cholecalciferol; the label states it contains fish (tilapia)
Suggested use on label
Label suggests 1 softgel daily, with food
Other ingredients
Safflower oil, fish gelatin softgel (gelatin, purified water, vegetable glycerin); contains fish (tilapia)
Label cautions
Keep out of reach of children; label says to consult a licensed physician, pharmacist or other qualified healthcare professional before taking dietary supplements; do not use if the seal is missing or broken.
iHerb listing
Product code CGN-01179; first listed on iHerb 12/2017; iHerb shows 151,239 reviews (a count, not a quality measure)
Pros
  • One softgel per serving
  • iHerb shows US$0.05/serving
Cons
  • Label states it contains fish (tilapia)

Best for: A one-softgel serving with 50 mcg (2,000 IU) vitamin D3 in a fish gelatin softgel, 90 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

6. NOW Foods Vitamin D3, 2,000 IU, 120 Softgels (NOW Foods)

Price: US$5.18 on iHerb US (checked 2026-11-04); iHerb shows US$0.04/serving. Prices and promotions differ by country, so the checkout page is final

Form
Softgel (bovine gelatin)
Serving size
1 softgel
Servings per container
120
Vitamin D per serving
50 mcg (2,000 IU), 250% DV
Source wording on label
Vitamin D as D3 cholecalciferol (from lanolin)
Suggested use on label
Label suggests 1 softgel daily with a meal
Other ingredients
Extra virgin olive oil, softgel capsule (bovine gelatin, glycerin, water), safflower oil
Label cautions
For adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.
iHerb listing
Product code NOW-00367; first listed on iHerb 05/2007; iHerb shows 195,130 reviews (a count, not a quality measure)
Pros
  • One softgel per serving
  • 120 servings per bottle
  • iHerb shows US$0.04/serving
Cons
  • Softgel shell is bovine gelatin

Best for: A one-softgel serving with 50 mcg (2,000 IU) vitamin D3 in a bovine gelatin softgel, 120 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

7. Thorne Vitamin D + K2, 1 fl oz (30 ml) (Thorne)

Price: US$34.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.06/serving. Prices and promotions differ by country, so the checkout page is final

Form
Liquid drops
Serving size
2 drops
Servings per container
600
Vitamin D per serving
25 mcg (1,000 IU), 125% DV
Vitamin K2 per serving
Vitamin K as K2 (menatetrenone, MK-4): 200 mcg, 167% DV
Source wording on label
Vitamin D as vitamin D3
Suggested use on label
Label suggests 2 drops one to three times daily, or as recommended by your health-care practitioner; the label says to invert the bottle to dispense drops and that the drops can be added to food or mixed into beverages; do not refrigerate
Other ingredients
Medium chain triglyceride oil, mixed tocopherols
Label cautions
Use only if the bottle is sealed; label says if pregnant, consult your health-care practitioner before use.
iHerb listing
Product code THR-50001; first listed on iHerb 05/2010; iHerb shows 32,833 reviews (a count, not a quality measure)
Pros
  • Liquid drops, 600 servings per bottle
  • No gelatin listed
  • iHerb shows US$0.06/serving
Cons
  • 2 drops per serving
  • Dosed by drops rather than a fixed capsule or softgel

Best for: Liquid drops with 25 mcg (1,000 IU) vitamin D3 and 200 mcg vitamin K per 2-drop serving, 600 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

8. Sports Research D3 + K2, Plant-Based, 125 mcg/100 mcg, 60 Veggie Softgels (Sports Research)

Price: US$25.97 on iHerb US (checked 2026-11-04); iHerb shows US$0.43/serving. Prices and promotions differ by country, so the checkout page is final

Form
Softgel (veggie, plant-based)
Serving size
1 veggie softgel
Servings per container
60
Vitamin D per serving
125 mcg (5,000 IU), 625% DV
Vitamin K2 per serving
Vitamin K2 as menaquinone-7 (MK-7 from chickpea): 100 mcg, DV not established
Source wording on label
Vitamin D3 as cholecalciferol from lichen (VEGADELIGHT)
Suggested use on label
Label suggests 1 veggie softgel daily with food, or as recommended by a qualified healthcare professional; the label says not to consume it with other high-dose vitamin D supplements
Other ingredients
Coconut MCT oil, Plantgel capsule (non-GMO modified tapioca starch, vegetable glycerin, purified water, turmeric for color), olive oil; label states it contains tree nuts (coconut)
Label cautions
Keep out of reach of children and pets; do not consume with other high-dose vitamin D supplements; label says to consult a qualified healthcare professional first, especially if you are pregnant, nursing, have a diagnosed medical condition or take medication.
iHerb listing
Product code SRE-01134; first listed on iHerb 02/2018; iHerb shows 25,903 reviews (a count, not a quality measure)
Pros
  • One softgel per serving
  • Veggie softgel with no animal gelatin listed
Cons
  • Label states it contains tree nuts (coconut)

Best for: A one-softgel serving with 125 mcg (5,000 IU) vitamin D3 plus 100 mcg vitamin K2 as MK-7 in a plant-based softgel, 60 servings per bottle. If you are pregnant, nursing, taking medication or have a medical condition, ask a doctor or pharmacist first.

Comparison table

ProductBrandFormServing sizeServings per containerVitamin D per servingVitamin K2 per servingSource wording on labelSuggested use on labelOther ingredientsLabel cautionsiHerb listingPrice
NOW Foods Vitamin D3 & K2, 120 CapsulesNOW FoodsCapsule (hypromellose)1 capsule12025 mcg (1,000 IU), 125% DVVitamin K2 as menaquinone-4 (MK-4): 45 mcg, DV not establishedVitamin D as D3 cholecalciferol (from lanolin)Label suggests 1 capsule 1 to 2 times daily with foodRice flour, hypromellose capsule, ascorbyl palmitate, silicon dioxideFor adults only; label says to consult a physician if pregnant or nursing, taking any medication or with a medical condition, and it has precautions about specific medication types, so ask a doctor or pharmacist; keep out of reach of children.Product code NOW-00369; first listed on iHerb 05/2008; iHerb shows 82,009 reviews (a count, not a quality measure)US$8.92 on iHerb US (checked 2026-11-04); iHerb shows US$0.07/serving. Prices and promotions differ by country, so the checkout page is final
California Gold Nutrition Vitamin D3 + K2 as MK-7, 180 Veggie CapsulesCalifornia Gold NutritionCapsule (veggie)1 capsule180125 mcg (5,000 IU), 625% DVVitamin K2 as menaquinone-7 (MK-7): 120 mcg, DV not establishedVitamin D as D3 cholecalciferolLabel suggests 1 capsule daily, with foodMicrocrystalline cellulose, hypromellose veggie capsule, magnesium stearate, dicalcium phosphate, silicon dioxide, MCT oilKeep out of reach of children; label says pregnant or lactating women, people under 18, those taking prescription medications and those with a medical condition should consult a healthcare professional first; it has precautions about specific medication types, so ask a doctor or pharmacist.Product code CGN-02333; first listed on iHerb 11/2023; iHerb shows 41,248 reviews (a count, not a quality measure)US$16.20 on iHerb US (checked 2026-11-04); iHerb shows US$0.09/serving. Prices and promotions differ by country, so the checkout page is final
California Gold Nutrition Vitamin D3, 125 mcg (5,000 IU), 90 Fish Gelatin SoftgelsCalifornia Gold NutritionSoftgel (fish gelatin)1 softgel90125 mcg (5,000 IU), 625% DV—Vitamin D as D3 cholecalciferol; the label states it contains fish (tilapia)Label suggests 1 softgel daily, with food; the label says not to exceed one softgel daily or take it with other supplements containing vitamin DSafflower oil, fish gelatin softgel (gelatin, vegetable glycerin, purified water); contains fish (tilapia)Keep out of reach of children; the label describes this as a high-potency vitamin D product and advises consulting a licensed physician, pharmacist or other qualified professional first if you are pregnant, nursing, taking prescription medications or have a diagnosed medical condition.Product code CGN-01065; first listed on iHerb 09/2016; iHerb shows 324,921 reviews (a count, not a quality measure)US$6.07 on iHerb US (checked 2026-11-04); iHerb shows US$0.07/serving. Prices and promotions differ by country, so the checkout page is final
NOW Foods Vitamin D-3, 125 mcg (5,000 IU), 120 SoftgelsNOW FoodsSoftgel (bovine gelatin)1 softgel120125 mcg (5,000 IU), 625% DV—Vitamin D as D3 cholecalciferol (from lanolin)Label suggests 1 softgel daily with a fat-containing meal, or as directed by your healthcare practitionerExtra virgin olive oil, softgel capsule (bovine gelatin, glycerin, water), safflower oilFor adults only; do not exceed the recommended dose; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition, and it has precautions about specific medication types and conditions, so ask a doctor or pharmacist; keep out of reach of children.Product code NOW-00372; first listed on iHerb 09/2008; iHerb shows 277,525 reviews (a count, not a quality measure)US$6.13 on iHerb US (checked 2026-11-04); iHerb shows US$0.05/serving. Prices and promotions differ by country, so the checkout page is final
California Gold Nutrition Vitamin D3, 50 mcg (2,000 IU), 90 Fish Gelatin SoftgelsCalifornia Gold NutritionSoftgel (fish gelatin)1 softgel9050 mcg (2,000 IU), 250% DV—Vitamin D as D3 cholecalciferol; the label states it contains fish (tilapia)Label suggests 1 softgel daily, with foodSafflower oil, fish gelatin softgel (gelatin, purified water, vegetable glycerin); contains fish (tilapia)Keep out of reach of children; label says to consult a licensed physician, pharmacist or other qualified healthcare professional before taking dietary supplements; do not use if the seal is missing or broken.Product code CGN-01179; first listed on iHerb 12/2017; iHerb shows 151,239 reviews (a count, not a quality measure)US$4.92 on iHerb US (checked 2026-11-04); iHerb shows US$0.05/serving. Prices and promotions differ by country, so the checkout page is final
NOW Foods Vitamin D3, 2,000 IU, 120 SoftgelsNOW FoodsSoftgel (bovine gelatin)1 softgel12050 mcg (2,000 IU), 250% DV—Vitamin D as D3 cholecalciferol (from lanolin)Label suggests 1 softgel daily with a mealExtra virgin olive oil, softgel capsule (bovine gelatin, glycerin, water), safflower oilFor adults only; label says to consult a physician if pregnant or nursing, taking medication or with a medical condition; keep out of reach of children.Product code NOW-00367; first listed on iHerb 05/2007; iHerb shows 195,130 reviews (a count, not a quality measure)US$5.18 on iHerb US (checked 2026-11-04); iHerb shows US$0.04/serving. Prices and promotions differ by country, so the checkout page is final
Thorne Vitamin D + K2, 1 fl oz (30 ml)ThorneLiquid drops2 drops60025 mcg (1,000 IU), 125% DVVitamin K as K2 (menatetrenone, MK-4): 200 mcg, 167% DVVitamin D as vitamin D3Label suggests 2 drops one to three times daily, or as recommended by your health-care practitioner; the label says to invert the bottle to dispense drops and that the drops can be added to food or mixed into beverages; do not refrigerateMedium chain triglyceride oil, mixed tocopherolsUse only if the bottle is sealed; label says if pregnant, consult your health-care practitioner before use.Product code THR-50001; first listed on iHerb 05/2010; iHerb shows 32,833 reviews (a count, not a quality measure)US$34.00 on iHerb US (checked 2026-11-04); iHerb shows US$0.06/serving. Prices and promotions differ by country, so the checkout page is final
Sports Research D3 + K2, Plant-Based, 125 mcg/100 mcg, 60 Veggie SoftgelsSports ResearchSoftgel (veggie, plant-based)1 veggie softgel60125 mcg (5,000 IU), 625% DVVitamin K2 as menaquinone-7 (MK-7 from chickpea): 100 mcg, DV not establishedVitamin D3 as cholecalciferol from lichen (VEGADELIGHT)Label suggests 1 veggie softgel daily with food, or as recommended by a qualified healthcare professional; the label says not to consume it with other high-dose vitamin D supplementsCoconut MCT oil, Plantgel capsule (non-GMO modified tapioca starch, vegetable glycerin, purified water, turmeric for color), olive oil; label states it contains tree nuts (coconut)Keep out of reach of children and pets; do not consume with other high-dose vitamin D supplements; label says to consult a qualified healthcare professional first, especially if you are pregnant, nursing, have a diagnosed medical condition or take medication.Product code SRE-01134; first listed on iHerb 02/2018; iHerb shows 25,903 reviews (a count, not a quality measure)US$25.97 on iHerb US (checked 2026-11-04); iHerb shows US$0.43/serving. Prices and promotions differ by country, so the checkout page is final

Buying criteria

FAQ

Is this a ranking of the best vitamin D supplement?

No. The order follows iHerb US's Best sellers list for the category on 2026-11-04. We have not tested the products and do not say which one is better.

Why do some products show 125 mcg and others 50 mcg?

Different labels print different amounts per serving. We list each as printed (125 mcg is 5,000 IU, 50 mcg is 2,000 IU, 25 mcg is 1,000 IU) and do not suggest an amount.

Why might the price on iHerb differ from this page?

We show iHerb US prices in USD as read on 2026-11-04. iHerb prices and promotions differ by country and change over time, so go by the price on the checkout page.

Where do the per-serving prices come from?

They are the "per serving" figures iHerb shows next to the price on its US page; we copy them and do not calculate our own.

Can I take these with medication or during pregnancy?

This page cannot answer that. Several labels advise asking a doctor if you are pregnant, nursing or taking medication, and some carry high-potency notes, so ask a doctor or pharmacist before use.