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Cheapest Cysteine on iHerb

Ranked by real cost per 10 mg of Cysteine — cheapest value first.

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

The priciest option here costs about 3,413.5× more per 10 mg of Cysteine than the best-value pick Designer Wellness. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 10 mg
1
Designer Wellness, Designer Whey, Natural 100% Whey Protein Powder, Gourmet Chocolate, 12 oz (340 g)
Designer Wellness, Designer Whey, Natural 100% Whey Protein Powder, Gourmet Chocolate, 12 oz (340 g)
Designer Wellness
2,000 mg1122.990.011View on iHerb →
2
Snap Supplements, Plant Protein, Vegan Protein Powder, Chocolate, 939 g
Snap Supplements, Plant Protein, Vegan Protein Powder, Chocolate, 939 g
Snap Supplements
414 mg3033.960.027View on iHerb →
3
Snap Supplements, Plant Protein, Vegan Protein Powder, Banana, 853 g
Snap Supplements, Plant Protein, Vegan Protein Powder, Banana, 853 g
Snap Supplements
414 mg3033.960.027View on iHerb →
4
Snap Supplements, Plant Protein with Nitric Oxide Booster, Vanilla, 868 g
Snap Supplements, Plant Protein with Nitric Oxide Booster, Vanilla, 868 g
Snap Supplements
414 mg3033.960.027View on iHerb →
5
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Strawberry Creme, 4 lb (1,820 g)
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Strawberry Creme, 4 lb (1,820 g)
Metabolic Nutrition
563 mg5289.990.031View on iHerb →
6
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Banana Creme, 2 lb (910 g)
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Banana Creme, 2 lb (910 g)
Metabolic Nutrition
563 mg2649.990.034View on iHerb →
7
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Peanut Butter Cookie, 2 lb (910 g)
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Peanut Butter Cookie, 2 lb (910 g)
Metabolic Nutrition
563 mg2649.990.034View on iHerb →
8
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Strawberry Creme, 2 lb (910 g)
Metabolic Nutrition, Protizyme, Specialized Designed Protein, Strawberry Creme, 2 lb (910 g)
Metabolic Nutrition
563 mg2649.990.034View on iHerb →
9
PlantFusion, Complete Protein, Creamy Vanilla Bean, 5 lb (2.25 kg)
PlantFusion, Complete Protein, Creamy Vanilla Bean, 5 lb (2.25 kg)
PlantFusion
380 mg7597.480.034View on iHerb →
10
MRM Nutrition, Egg White Protein, Chocolate, 12 oz (340 g)
MRM Nutrition, Egg White Protein, Chocolate, 12 oz (340 g)
MRM Nutrition
630 mg1022.490.036View on iHerb →
11
NutraBio, Classic Whey Protein, Orange Dream, 2 lb (907 g)
NutraBio, Classic Whey Protein, Orange Dream, 2 lb (907 g)
NutraBio
500 mg2649.990.039View on iHerb →
12
NutraBio, Classic Whey Protein, Pistachio Delight, 2 lb (907 g)
NutraBio, Classic Whey Protein, Pistachio Delight, 2 lb (907 g)
NutraBio
500 mg2649.990.039View on iHerb →
13
NutraBio, Grass Fed Whey Protein Isolate, Vanilla Bean Ice Cream, 2 lb (907 g)
NutraBio, Grass Fed Whey Protein Isolate, Vanilla Bean Ice Cream, 2 lb (907 g)
NutraBio
516 mg2967.990.045View on iHerb →
14
PlantFusion, Complete Protein, Rich Chocolate, 2 lb (900 g)
PlantFusion, Complete Protein, Rich Chocolate, 2 lb (900 g)
PlantFusion
380 mg3052.480.046View on iHerb →
15
PB2 Foods, Performance, Peanut Protein with Madagascar Vanilla, 2 lb (907 g)
PB2 Foods, Performance, Peanut Protein with Madagascar Vanilla, 2 lb (907 g)
PB2 Foods
264 mg2024.990.047View on iHerb →
16
MRM Nutrition, Egg White Protein, Vanilla, 12 oz (340 g)
MRM Nutrition, Egg White Protein, Vanilla, 12 oz (340 g)
MRM Nutrition
630 mg1029.990.048View on iHerb →
17
Life Enhancement, Durk Pearson & Sandy Shaw's®, Personal Radical Shield™, 336 Vegetarian Capsules
Life Enhancement, Durk Pearson & Sandy Shaw's®, Personal Radical Shield™, 336 Vegetarian Capsules
Life Enhancement
125 mg11272.700.052View on iHerb →
18
Best Naturals, Multi Collagen Peptides, Unflavored, 1 lb (454 g)
Best Naturals, Multi Collagen Peptides, Unflavored, 1 lb (454 g)
Best Naturals
8 mg5827.960.603View on iHerb →
19
NaturesPlus, Collagen Peptides, Vanilla , 0.8 lb (364 g)
NaturesPlus, Collagen Peptides, Vanilla , 0.8 lb (364 g)
NaturesPlus
20 mg1425.460.909View on iHerb →
20
NaturesPlus, Collagen Creamer, Vanilla, 0.66 lb (300 g)
NaturesPlus, Collagen Creamer, Vanilla, 0.66 lb (300 g)
NaturesPlus
10 mg1222.911.91View on iHerb →
21
Snap Supplements, Collagen & Greens, Raspberry, 11.34 oz (321.6 g)
Snap Supplements, Collagen & Greens, Raspberry, 11.34 oz (321.6 g)
Snap Supplements
4 mg3036.513.04View on iHerb →
22
NaturesPlus, Source of Life, Power Teen® for Him, Sugar Free, Wild Berry, 60 Chewable Tablets
NaturesPlus, Source of Life, Power Teen® for Him, Sugar Free, Wild Berry, 60 Chewable Tablets
NaturesPlus
2 mg3022.064.33View on iHerb →
23
MusclePharm, Pro Series Clear-ISO, Protein Powder Drink Mix, Cherry Slush, 1.14 lbs (520 mg)
MusclePharm, Pro Series Clear-ISO, Protein Powder Drink Mix, Cherry Slush, 1.14 lbs (520 mg)
MusclePharm
1 g2039.9933.33View on iHerb →
24
MusclePharm, Pro Series Clear-ISO, Protein Powder Drink Mix, Sour Peach Rings, 1.14 lbs (520 mg)
MusclePharm, Pro Series Clear-ISO, Protein Powder Drink Mix, Sour Peach Rings, 1.14 lbs (520 mg)
MusclePharm
1 g2039.9933.33View on iHerb →
25
Life Extension, Wellness Code, Whey Protein Isolate, Chocolate, 0.96 lb (437 g)
Life Extension, Wellness Code, Whey Protein Isolate, Chocolate, 0.96 lb (437 g)
Life Extension
0 g2029.2535.67View on iHerb →

How we rank Cysteine

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.