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Cheapest Vitamin C (sodium ascorbate and ascorbic acid) on iHerb

Ranked by real cost per 100 mg of Vitamin C (sodium ascorbate and ascorbic acid) — cheapest value first.

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

The priciest option here costs about 14.4× more per 100 mg of Vitamin C (sodium ascorbate and ascorbic acid) than the best-value pick Kirkman Labs. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Kirkman Labs, Buffered Vitamin C Powder, Passionfruit, 7 oz (198.5 g)
Kirkman Labs, Buffered Vitamin C Powder, Passionfruit, 7 oz (198.5 g)
Kirkman Labs
1,100 mg15818.800.011View on iHerb →
2
KAL, C Powder, Acid-Free, 8 oz (227 g)
KAL, C Powder, Acid-Free, 8 oz (227 g)
KAL
4,200 mg4523.290.012View on iHerb →
3
Carlson, Mild-C®, Vitamin C Powder, 1,600 mg, 6 oz (170 g)
Carlson, Mild-C®, Vitamin C Powder, 1,600 mg, 6 oz (170 g)
Carlson
1,600 mg8516.920.012View on iHerb →
4
ProHealth Longevity, Pro-C Complex, 1,000 mg, 120 Tablets
ProHealth Longevity, Pro-C Complex, 1,000 mg, 120 Tablets
ProHealth Longevity
1,000 mg12017.490.015View on iHerb →
5
Kirkman Labs, Buffered Vitamin C Powder, Unflavored, 7 oz (198.5 g)
Kirkman Labs, Buffered Vitamin C Powder, Unflavored, 7 oz (198.5 g)
Kirkman Labs
1,100 mg15825.500.015View on iHerb →
6
Hi Tech Pharmaceuticals, Vitamin C, 500 mg, 200 Tablets
Hi Tech Pharmaceuticals, Vitamin C, 500 mg, 200 Tablets
Hi Tech Pharmaceuticals
1,000 mg10022.950.023View on iHerb →
7
Kirkman Labs, Chewable Vitamin C, 250 mg, 250 Tablets
Kirkman Labs, Chewable Vitamin C, 250 mg, 250 Tablets
Kirkman Labs
250 mg25017.620.028View on iHerb →
8
Paradise Herbs, Earth's Blend®, Vitamin C, 90 Vegetarian Capsules
Paradise Herbs, Earth's Blend®, Vitamin C, 90 Vegetarian Capsules
Paradise Herbs
500 mg9014.990.033View on iHerb →
9
NATURELO, Vitamin C With Acerola Cherries Plus Citrus Bioflavonoids, 180 Vegetarian Capsules
NATURELO, Vitamin C With Acerola Cherries Plus Citrus Bioflavonoids, 180 Vegetarian Capsules
NATURELO
500 mg18039.490.044View on iHerb →
10
Carlson, ACES®, 200 Soft Gels
Carlson, ACES®, 200 Soft Gels
Carlson
1,000 mg10052.700.053View on iHerb →
11
Nutra BioGenesis, BioPotent C, 135 Vegetarian Capsules
Nutra BioGenesis, BioPotent C, 135 Vegetarian Capsules
Nutra BioGenesis
1,200 mg4528.490.053View on iHerb →
12
NATURELO, Vitamin C With Acerola Cherries Plus Citrus Bioflavonoids, 90 Vegetarian Capsules
NATURELO, Vitamin C With Acerola Cherries Plus Citrus Bioflavonoids, 90 Vegetarian Capsules
NATURELO
500 mg9024.950.055View on iHerb →
13
Carlson, Kid's Chewable Vitamin C, Natural Tangerine, 120 Vegetarian Tablets
Carlson, Kid's Chewable Vitamin C, Natural Tangerine, 120 Vegetarian Tablets
Carlson
250 mg12016.920.056View on iHerb →
14
Carlson, ACES®, Vitamins A, C, E + Selenium, 90 Softgels
Carlson, ACES®, Vitamins A, C, E + Selenium, 90 Softgels
Carlson
1,000 mg4525.420.057View on iHerb →
15
Carlson, ACES®, 50 Soft Gels
Carlson, ACES®, 50 Soft Gels
Carlson
1,000 mg2515.220.061View on iHerb →
16
Solaray, Timed Release Vitamin B-Stress PM™, 120 Capsules
Solaray, Timed Release Vitamin B-Stress PM™, 120 Capsules
Solaray
500 mg6020.790.069View on iHerb →
17
LifeSeasons, Liposomal Vitamin C, 60 Veg Capsules (500 mg per Capsule)
LifeSeasons, Liposomal Vitamin C, 60 Veg Capsules (500 mg per Capsule)
LifeSeasons
1,000 mg3021.990.073View on iHerb →
18
Carlson, Aces + Zn®, 360 Soft Gels
Carlson, Aces + Zn®, 360 Soft Gels
Carlson
500 mg18079.480.088View on iHerb →
19
NOW Foods, Solutions, Wrinkle Rescue™, 60 Veg Capsules
NOW Foods, Solutions, Wrinkle Rescue™, 60 Veg Capsules
NOW Foods
500 mg3015.300.102View on iHerb →
20
Carlson, Aces + Zn®, 60 Soft Gels
Carlson, Aces + Zn®, 60 Soft Gels
Carlson
500 mg3016.920.113View on iHerb →
21
NOW Foods, EcoGreen Multi, Iron-Free, 180 Veg Capsules
NOW Foods, EcoGreen Multi, Iron-Free, 180 Veg Capsules
NOW Foods
250 mg9029.390.131View on iHerb →
22
Nature's Way, Alive!® Vitamin C Powder Drink Mix, 4.23 oz (120 g)
Nature's Way, Alive!® Vitamin C Powder Drink Mix, 4.23 oz (120 g)
Nature's Way
500 mg3020.610.137View on iHerb →
23
Nature's Way, Alive!®, Vitamin C, 120 Vegan Capsules (125 mg per Capsule)
Nature's Way, Alive!®, Vitamin C, 120 Vegan Capsules (125 mg per Capsule)
Nature's Way
500 mg3021.420.143View on iHerb →
24
NATURELO, Immune Support with Elderberry, Vitamin C & Zinc plus Echinacea, 60 Vegetarian Capsules
NATURELO, Immune Support with Elderberry, Vitamin C & Zinc plus Echinacea, 60 Vegetarian Capsules
NATURELO
250 mg6021.950.146View on iHerb →
25
Carlson, Super 1 Daily®, 60 Vegetarian Tablets
Carlson, Super 1 Daily®, 60 Vegetarian Tablets
Carlson
300 mg6027.970.155View on iHerb →

How we rank Vitamin C (sodium ascorbate and ascorbic acid)

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.