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Cheapest Vitamin D-3 (as Cholecalciferol) on iHerb

Ranked by real cost per 1,000 IU of Vitamin D-3 (as Cholecalciferol) — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 18.0× more per 1,000 IU of Vitamin D-3 (as Cholecalciferol) than the best-value pick Vitamatic. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 1,000 IU
1
Vitamatic, Copper Bisglycinate, 240 Tablets
Vitamatic, Copper Bisglycinate, 240 Tablets
Vitamatic
2,000 IU12014.990.063View on iHerb →
2
Hi Tech Pharmaceuticals, Vitamin D3, 2,000 IU, 100 Tablets
Hi Tech Pharmaceuticals, Vitamin D3, 2,000 IU, 100 Tablets
Hi Tech Pharmaceuticals
2,000 IU10019.950.100View on iHerb →
3
Forest Leaf, Vitamin D3, 1,250 mcg (50,000 IU), 240 Vegetable Capsules
Forest Leaf, Vitamin D3, 1,250 mcg (50,000 IU), 240 Vegetable Capsules
Forest Leaf
1,250 mcg24034.990.117View on iHerb →
4
Forest Leaf, Maximum Strength, Vitamin D3, 1,250 mcg (50,000 IU), 120 Vegetable Capsules
Forest Leaf, Maximum Strength, Vitamin D3, 1,250 mcg (50,000 IU), 120 Vegetable Capsules
Forest Leaf
1,250 mcg12019.990.133View on iHerb →
5
Snap Supplements, Testo Booster, 90 Capsules
Snap Supplements, Testo Booster, 90 Capsules
Snap Supplements
5,000 IU3029.710.198View on iHerb →
6
Amazing Nutrition, Amazing Omega, Norwegian Cod Liver Oil, Lemon, 1,000 mg, 250 Softgels
Amazing Nutrition, Amazing Omega, Norwegian Cod Liver Oil, Lemon, 1,000 mg, 250 Softgels
Amazing Nutrition
500 IU25024.980.200View on iHerb →
7
Amazing Nutrition, Norwegian Cod Liver Oil, Fresh Orange, 1,250 mg, 120 Softgels
Amazing Nutrition, Norwegian Cod Liver Oil, Fresh Orange, 1,250 mg, 120 Softgels
Amazing Nutrition
625 IU12016.490.220View on iHerb →
8
Amazing Nutrition, Amazing Omega, Norwegian Cod Liver Oil, Fresh Orange, 1,000 mg, 250 Softgels
Amazing Nutrition, Amazing Omega, Norwegian Cod Liver Oil, Fresh Orange, 1,000 mg, 250 Softgels
Amazing Nutrition
500 IU25027.490.220View on iHerb →
9
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 500 Tablets
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 500 Tablets
Amazing Nutrition
600 IU16625.490.256View on iHerb →
10
Amazing Nutrition, Norwegian Cod Liver Oil, Lemon, 1,250 mg, 120 Softgels
Amazing Nutrition, Norwegian Cod Liver Oil, Lemon, 1,250 mg, 120 Softgels
Amazing Nutrition
625 IU12019.990.267View on iHerb →
11
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 300 Tablets
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 300 Tablets
Amazing Nutrition
600 IU10016.490.275View on iHerb →
12
Pure Synergy, D3 + K2 Complex™, 60 Capsules
Pure Synergy, D3 + K2 Complex™, 60 Capsules
Pure Synergy
2,000 IU6035.700.298View on iHerb →
13
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 150 Tablets
Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 150 Tablets
Amazing Nutrition
600 IU509.890.330View on iHerb →
14
Force Factor, Vitamin D3, 125 mcg (5,000 IU), 120 Softgels
Force Factor, Vitamin D3, 125 mcg (5,000 IU), 120 Softgels
Force Factor
125 mcg1204.990.333View on iHerb →
15
California Gold Nutrition, Vitamin D3, 125 mcg (5,000 IU), 360 Fish Gelatin Softgels
California Gold Nutrition, Vitamin D3, 125 mcg (5,000 IU), 360 Fish Gelatin Softgels
California Gold Nutrition
125 mcg36016.280.362View on iHerb →
16
Forest Leaf, Vitamin D3, 250 mcg (10,000 IU), 180 Vegetable Capsules
Forest Leaf, Vitamin D3, 250 mcg (10,000 IU), 180 Vegetable Capsules
Forest Leaf
250 mcg18016.990.378View on iHerb →
17
Nature's Life, Drop Of Sunshine, 125 mcg (5,000 IU), 2 fl oz (60 ml)
Nature's Life, Drop Of Sunshine, 125 mcg (5,000 IU), 2 fl oz (60 ml)
Nature's Life
125 mcg36517.290.379View on iHerb →
18
Zahler, Vitamin D3, Advanced D3 Formula, 125 mcg (5,000 IU), 1 fl oz (30 ml)
Zahler, Vitamin D3, Advanced D3 Formula, 125 mcg (5,000 IU), 1 fl oz (30 ml)
Zahler
125 mcg52525.320.386View on iHerb →
19
Forest Leaf, Vitamin D3, 125 mcg (5,000 IU), 180 Vegetable Capsules
Forest Leaf, Vitamin D3, 125 mcg (5,000 IU), 180 Vegetable Capsules
Forest Leaf
125 mcg18014.990.666View on iHerb →
20
Bluebonnet Nutrition, Liquid Vitamin D3 Drops, Citrus, 25 mcg (1,000 IU), 1 fl oz (30 ml)
Bluebonnet Nutrition, Liquid Vitamin D3 Drops, Citrus, 25 mcg (1,000 IU), 1 fl oz (30 ml)
Bluebonnet Nutrition
25 mcg90016.760.745View on iHerb →
21
Protocol for Life Balance, Liquid Vitamin D3, 1 fl oz (30 ml)
Protocol for Life Balance, Liquid Vitamin D3, 1 fl oz (30 ml)
Protocol for Life Balance
50 mcg37515.000.800View on iHerb →
22
ProHealth Longevity, D3, 125 mcg (5,000 IU), 100 Capsules
ProHealth Longevity, D3, 125 mcg (5,000 IU), 100 Capsules
ProHealth Longevity
125 mcg10012.490.999View on iHerb →
23
Natural Factors, Whole Earth & Sea®, Women's Prenatal Multivitamin & Mineral, 60 Tablets
Natural Factors, Whole Earth & Sea®, Women's Prenatal Multivitamin & Mineral, 60 Tablets
Natural Factors
1,000 IU3030.071.00View on iHerb →
24
Zahler, Vitamin D3, Advanced D3 Formula, 75 mcg (3,000 IU), 250 Softgels
Zahler, Vitamin D3, Advanced D3 Formula, 75 mcg (3,000 IU), 250 Softgels
Zahler
75 mcg25019.471.04View on iHerb →
25
Natural Factors, Vitamin D3 Drops, Unflavored, 25 mcg (1,000 IU), 0.5 fl oz (15 ml)
Natural Factors, Vitamin D3 Drops, Unflavored, 25 mcg (1,000 IU), 0.5 fl oz (15 ml)
Natural Factors
25 mcg50013.971.12View on iHerb →

How we rank Vitamin D-3 (as Cholecalciferol)

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.