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Cheapest Serine on iHerb

Ranked by real cost per 100 mg of Serine — cheapest value first.

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

The priciest option here costs about 2.9× more per 100 mg of Serine 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 100 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
3,900 mg1122.990.054View on iHerb →
2
NutriBiotic, Rice Protein Powder, Vanilla, 3 lb (1.36 kg)
NutriBiotic, Rice Protein Powder, Vanilla, 3 lb (1.36 kg)
NutriBiotic
582 mg9038.610.074View on iHerb →
3
NutriBiotic, Rice Protein Powder, Chocolate, 3 lb (1.36 kg)
NutriBiotic, Rice Protein Powder, Chocolate, 3 lb (1.36 kg)
NutriBiotic
536 mg8538.610.085View on iHerb →
4
BPI Sports, ISO HD™, 100% Pure Isolate Protein, Vanilla Cookie, 4.8 lbs (2,170 g)
BPI Sports, ISO HD™, 100% Pure Isolate Protein, Vanilla Cookie, 4.8 lbs (2,170 g)
BPI Sports
1,274 mg7081.600.092View on iHerb →
5
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Vanilla Ice Cream, 4.8 lbs (2,176 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Vanilla Ice Cream, 4.8 lbs (2,176 g)
BPI Sports
1,270 mg6889.950.104View on iHerb →
6
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Cinnamon Cereal, 4.8 lbs (2,176 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Cinnamon Cereal, 4.8 lbs (2,176 g)
BPI Sports
1,270 mg6889.950.104View on iHerb →
7
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Fruity Loopers, 4.8 lbs (2,176 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Fruity Loopers, 4.8 lbs (2,176 g)
BPI Sports
1,270 mg6889.950.104View on iHerb →
8
Levels, Grass Fed Whey Protein Powder, Vanilla Cinnamon, 5 lb (2.27 kg)
Levels, Grass Fed Whey Protein Powder, Vanilla Cinnamon, 5 lb (2.27 kg)
Levels
1,210 mg7189.990.105View on iHerb →
9
Levels, Grass Fed Whey Protein Powder, Double Chocolate, 5 lbs (2.27 kg)
Levels, Grass Fed Whey Protein Powder, Double Chocolate, 5 lbs (2.27 kg)
Levels
1,200 mg7189.990.106View on iHerb →
10
Levels, Grass Fed Whey Protein Powder, Cappuccino, 5 lb (2.27 kg)
Levels, Grass Fed Whey Protein Powder, Cappuccino, 5 lb (2.27 kg)
Levels
1,180 mg7189.990.107View on iHerb →
11
PlantFusion, Complete Protein, Creamy Vanilla Bean, 5 lb (2.25 kg)
PlantFusion, Complete Protein, Creamy Vanilla Bean, 5 lb (2.25 kg)
PlantFusion
1,180 mg7597.480.110View on iHerb →
12
Snap Supplements, Plant Protein, Vegan Protein Powder, Chocolate, 939 g
Snap Supplements, Plant Protein, Vegan Protein Powder, Chocolate, 939 g
Snap Supplements
988 mg3033.960.115View on iHerb →
13
Snap Supplements, Plant Protein, Vegan Protein Powder, Banana, 853 g
Snap Supplements, Plant Protein, Vegan Protein Powder, Banana, 853 g
Snap Supplements
988 mg3033.960.115View on iHerb →
14
Snap Supplements, Plant Protein with Nitric Oxide Booster, Vanilla, 868 g
Snap Supplements, Plant Protein with Nitric Oxide Booster, Vanilla, 868 g
Snap Supplements
988 mg3033.960.115View 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
950 mg2024.990.132View on iHerb →
16
Levels, Grass Fed Whey Protein Powder, Vanilla Cinnamon, 2 lb (907 g)
Levels, Grass Fed Whey Protein Powder, Vanilla Cinnamon, 2 lb (907 g)
Levels
1,210 mg2844.990.133View on iHerb →
17
Levels, Grass Fed Whey Protein Powder, Vanilla Bean, 2 lb (907 g)
Levels, Grass Fed Whey Protein Powder, Vanilla Bean, 2 lb (907 g)
Levels
1,200 mg2844.990.134View on iHerb →
18
MRM Nutrition, Egg White Protein, Chocolate, 12 oz (340 g)
MRM Nutrition, Egg White Protein, Chocolate, 12 oz (340 g)
MRM Nutrition
1,570 mg1022.490.143View on iHerb →
19
BodyTech, Whey Protein Isolate, Rich Chocolate, 5 lbs (2.27 kg)
BodyTech, Whey Protein Isolate, Rich Chocolate, 5 lbs (2.27 kg)
BodyTech
1,150 mg71118.240.145View on iHerb →
20
Levels, Grass Fed Whey Protein Powder, Chocolate Peanut Butter, 2 lb (907 g)
Levels, Grass Fed Whey Protein Powder, Chocolate Peanut Butter, 2 lb (907 g)
Levels
1,190 mg2644.990.145View on iHerb →
21
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
1,188 mg5289.990.146View on iHerb →
22
PlantFusion, Complete Protein, Rich Chocolate, 2 lb (900 g)
PlantFusion, Complete Protein, Rich Chocolate, 2 lb (900 g)
PlantFusion
1,180 mg3052.480.148View on iHerb →
23
EHPlabs, OxyWhey, Lean Wellness Protein, Choc Caramel, 2.03 lb (922 g)
EHPlabs, OxyWhey, Lean Wellness Protein, Choc Caramel, 2.03 lb (922 g)
EHPlabs
1,118 mg2744.950.149View on iHerb →
24
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Cinnamon Cereal, 1.62 lbs (736 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Cinnamon Cereal, 1.62 lbs (736 g)
BPI Sports
1,270 mg2344.950.154View on iHerb →
25
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Vanilla Ice Cream, 1.62 lbs (736 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Vanilla Ice Cream, 1.62 lbs (736 g)
BPI Sports
1,270 mg2344.950.154View on iHerb →

How we rank Serine

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.