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Cheapest Threonine on iHerb

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

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

The priciest option here costs about 4.6× more per 100 mg of Threonine 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
8,300 mg1122.990.025View on iHerb →
2
BSN, AminoX, EAAs, Muscle Support & Recovery, Watermelon Smash, 13.2 oz (375 g)
BSN, AminoX, EAAs, Muscle Support & Recovery, Watermelon Smash, 13.2 oz (375 g)
BSN
1,400 mg2523.010.066View on iHerb →
3
BSN, AminoX®, EAAs, Strawberry Dragon Fruit, 13.2 oz (375 g)
BSN, AminoX®, EAAs, Strawberry Dragon Fruit, 13.2 oz (375 g)
BSN
1,400 mg2523.010.066View 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
1,743 mg7081.600.067View on iHerb →
5
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
1,680 mg7189.990.075View on iHerb →
6
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
1,728 mg6889.950.077View on iHerb →
7
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
1,728 mg6889.950.077View on iHerb →
8
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
1,728 mg6889.950.077View 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
1,640 mg7189.990.077View 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
1,610 mg7189.990.079View on iHerb →
11
BodyTech, Whey Protein Isolate, Rich Chocolate, 5 lbs (2.27 kg)
BodyTech, Whey Protein Isolate, Rich Chocolate, 5 lbs (2.27 kg)
BodyTech
1,850 mg71118.240.090View on iHerb →
12
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
1,813 mg5289.990.096View on iHerb →
13
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
1,680 mg2844.990.096View on iHerb →
14
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
1,680 mg2844.990.096View on iHerb →
15
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
1,705 mg2744.950.098View on iHerb →
16
NutriBiotic, Rice Protein Powder, Vanilla, 3 lb (1.36 kg)
NutriBiotic, Rice Protein Powder, Vanilla, 3 lb (1.36 kg)
NutriBiotic
422 mg9038.610.102View on iHerb →
17
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
1,813 mg2649.990.106View on iHerb →
18
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
1,813 mg2649.990.106View on iHerb →
19
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
1,813 mg2649.990.106View 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
1,580 mg2644.990.110View on iHerb →
21
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
1,728 mg2344.950.113View on iHerb →
22
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
1,728 mg2344.950.113View on iHerb →
23
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Chocolate Lava Cake, 1.62 lbs (736 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Chocolate Lava Cake, 1.62 lbs (736 g)
BPI Sports
1,728 mg2344.950.113View on iHerb →
24
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Fruity Loopers, 1.62 lbs (736 g)
BPI Sports, Hydro HD™, Hydrolyzed Whey Protein, Fruity Loopers, 1.62 lbs (736 g)
BPI Sports
1,728 mg2344.950.113View on iHerb →
25
NutraBio, Classic Whey Protein, Orange Dream, 2 lb (907 g)
NutraBio, Classic Whey Protein, Orange Dream, 2 lb (907 g)
NutraBio
1,675 mg2649.990.115View on iHerb →

How we rank Threonine

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.