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Cheapest L-Proline on iHerb

Ranked by real cost per 1,000 mg of L-Proline — cheapest value first.

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

The priciest option here costs about 1,207.8× more per 1,000 mg of L-Proline than the best-value pick Nutricost. 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 mg
1
Nutricost, L-Proline, Unflavored, 8.8 oz (250 g)
Nutricost, L-Proline, Unflavored, 8.8 oz (250 g)
Nutricost
2,000 mg12517.950.072View on iHerb →
2
Nutricost, L-Proline, 180 Capsules (500 mg per Capsule)
Nutricost, L-Proline, 180 Capsules (500 mg per Capsule)
Nutricost
1,000 mg9014.950.166View on iHerb →
3
Carlson, Pro-Rite, 200 Vegetarian Capsules
Carlson, Pro-Rite, 200 Vegetarian Capsules
Carlson
500 mg10033.920.678View on iHerb →
4
Carlson, Pro-Rite, 90 Vegetarian Capsules
Carlson, Pro-Rite, 90 Vegetarian Capsules
Carlson
500 mg4516.070.714View on iHerb →
5
Metabolic Nutrition, Amino 4500, 180 Tablets
Metabolic Nutrition, Amino 4500, 180 Tablets
Metabolic Nutrition
518 mg6036.991.19View on iHerb →
6
Metabolic Nutrition, Amino 4500, 90 Tablets
Metabolic Nutrition, Amino 4500, 90 Tablets
Metabolic Nutrition
518 mg3019.991.29View on iHerb →
7
DaVinci Laboratories, Benefits Line, Nitro Benefits, 10.9 oz (309 g)
DaVinci Laboratories, Benefits Line, Nitro Benefits, 10.9 oz (309 g)
DaVinci Laboratories
1,000 mg3062.722.09View on iHerb →
8
Nature's Answer, Brewer's Yeast , 16 oz (454 g)
Nature's Answer, Brewer's Yeast , 16 oz (454 g)
Nature's Answer
400 mg1514.242.37View on iHerb →
9
California Gold Nutrition, Hyaluronic Acid Complex with L-Proline, French Grape Seed and French Maritime Pine Bark Extract, 60 Veggie Capsules
California Gold Nutrition, Hyaluronic Acid Complex with L-Proline, French Grape Seed and French Maritime Pine Bark Extract, 60 Veggie Capsules
California Gold Nutrition
100 mg6017.692.95View on iHerb →
10
Source Naturals, HeartScience™, Multi-Nutrient Complex, 120 Tablets
Source Naturals, HeartScience™, Multi-Nutrient Complex, 120 Tablets
Source Naturals
400 mg2046.635.83View on iHerb →
11
The Vitamin Shoppe, Amino Acid Complex, 100 Tablets
The Vitamin Shoppe, Amino Acid Complex, 100 Tablets
The Vitamin Shoppe
182 mg2527.996.15View on iHerb →
12
Solgar, Skin, Nails & Hair, Advanced MSM Formula, 120 Tablets
Solgar, Skin, Nails & Hair, Advanced MSM Formula, 120 Tablets
Solgar
50 mg6018.926.31View on iHerb →
13
HealthyCell, Joint Health & Mobility, Orange, 30 Gel Packs, 0.84 fl oz (25 ml) Each
HealthyCell, Joint Health & Mobility, Orange, 30 Gel Packs, 0.84 fl oz (25 ml) Each
HealthyCell
330 mg3064.956.56View on iHerb →
14
Carlson, Cardio Complete, Advanced Cardiovascular Multi, 90 Tablets
Carlson, Cardio Complete, Advanced Cardiovascular Multi, 90 Tablets
Carlson
150 mg3029.676.59View on iHerb →
15
NOW Foods, Solutions, Clinically Advanced Hair, Skin & Nails, 90 Capsules
NOW Foods, Solutions, Clinically Advanced Hair, Skin & Nails, 90 Capsules
NOW Foods
100 mg3020.206.73View on iHerb →
16
Bluebonnet Nutrition, Amino Acid , 750 mg, 180 Vegetable Capsules
Bluebonnet Nutrition, Amino Acid , 750 mg, 180 Vegetable Capsules
Bluebonnet Nutrition
150 mg4548.767.22View on iHerb →
17
Metagenics, UltraGI Replenish®, Vanilla, 46.03 oz (1,305 g)
Metagenics, UltraGI Replenish®, Vanilla, 46.03 oz (1,305 g)
Metagenics
55030122.957.45View on iHerb →
18
NOW Foods, Liquid Hyaluronic Acid, Berry, 100 mg, 16 fl oz (473 ml)
NOW Foods, Liquid Hyaluronic Acid, Berry, 100 mg, 16 fl oz (473 ml)
NOW Foods
100 mg3224.507.66View on iHerb →
19
Country Life, Max-Amino Caps with Vitamin B6, 90 Vegetarian Capsules
Country Life, Max-Amino Caps with Vitamin B6, 90 Vegetarian Capsules
Country Life
80 mg2214.398.18View on iHerb →
20
Codeage, Amen, Vegan Collagen Builder+, 30 Vegetable Capsules
Codeage, Amen, Vegan Collagen Builder+, 30 Vegetable Capsules
Codeage
100 mg3024.998.33View on iHerb →
21
Country Life, Max-Amino Caps with Vitamin B-6, 180 Vegetarian Capsules
Country Life, Max-Amino Caps with Vitamin B-6, 180 Vegetarian Capsules
Country Life
80 mg4532.699.08View on iHerb →
22
Codeage, Hair Skin Nails Vitamins, Platinum, 60 Vegetable Capsules
Codeage, Hair Skin Nails Vitamins, Platinum, 60 Vegetable Capsules
Codeage
50 mg3049.9933.33View on iHerb →
23
DaVinci Laboratories, Amino 21, 750 mg, 90 Capsules
DaVinci Laboratories, Amino 21, 750 mg, 90 Capsules
DaVinci Laboratories
8 mg9036.0053.33View on iHerb →
24
Swolverine, Collagen, Unflavored, 10.58 oz (300 g)
Swolverine, Collagen, Unflavored, 10.58 oz (300 g)
Swolverine
15 %3029.5967.10View on iHerb →
25
Source Naturals, L-Proline Powder, 4 oz (113.4 g)
Source Naturals, L-Proline Powder, 4 oz (113.4 g)
Source Naturals
2 g569.7486.96View on iHerb →

How we rank L-Proline

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.