Cheapest Plant Protein in the US
(September 2026)
We track 26 full-size plant protein products on Amazon.com and rank them by cost per gram of protein. This month's lowest-priced options: pea protein from NAKED at $0.028/g, plant blend from Nutricost at $0.027/g, fermented yeast from RNWY at $0.095/g. Each table groups comparable protein sources so you can choose the right one for your diet and budget.
// cheapest_pea_protein_us
Pea protein is dairy-free, soy-free, and widely used for daily training. It is especially useful if you want a straightforward single-source plant protein.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | NAKED Pea - 5LB 100% Pea Protein Powder from North American Farms - Unflavored Vegan Pea Protein Isolate - NSF Certified, Plant Protein Powder, Easy to Digest - 76 ServingsNAKED ✓ certified | $57.99 | 5lb | $0.028 | unchanged | View deal → |
| 2 | Nutricost Organic Pea Protein Isolate Powder (5LBS) - Unflavored, Certified USDA Organic, Protein from Plants, Vegetarian Friendly, Gluten Free, Non-GMONutricost ✓ certified | $62.95 | 5lb | $0.035 | unchanged | View deal → |
| 3 | Zammex Organic Pea Protein Powder, 26g Protein, BCAA, Plant Based 100% Vegan Pea Protein, Gluten Free, Keto Friendly, Unflavored 2.62lbsZammex ✓ certified | $34.95 | 3lb | $0.038 | unchanged | View deal → |
| 4 | Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Vanilla Peanut ButterTransparent Labs ✓ certified | $64.99 | 3lb | $0.077 | ↑ 8.3% | View deal → |
1 product per brand · 900g+ packs only · in-stock only · ranked by $/g protein · prices updated daily from Amazon.com.
// cheapest_plant_blend_protein_us
Multi-source blends combine complementary plant sources for a broader amino acid profile. This table also includes single-source rice protein, a common soy-free option.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | Nutricost Organic Rice Protein Powder (5 LB) - Gluten-Free, GMO-Free (from Brown Rice)Nutricost ✓ certified | $49.95 | 5lb | $0.027 | unchanged | View deal → |
| 2 | NAKED nutrition Rice - Organic Brown Rice Protein Powder - Vegan Protein Powder - 5Lb Bulk, Gmo Free, Gluten Free & Soy Free. Plant-Based Protein, No Artificial Ingredients - 76 ServingsNAKED ✓ certified | $74.99 | 5lb | $0.039 | unchanged | View deal → |
| 3 | OWYN Only What You Need Vanilla Flavored 30g Protein Powder, 2.96 LBOWYN Only What You Need ✓ certified | $49.99 | 3lb | $0.062 | unchanged | View deal → |
| 4 | Vega Protein + Recovery, Chocolate – 30g Vegan Protein, Dairy & Gluten Free, Probiotics, NSF Certified, 4.4 lbs (45 Servings)Vega ✓ certified | $84.55 | 4lb | $0.063 | ↓ 1.7% | View deal → |
| 5 | Orgain Organic Vegan 21g Protein Powder, Vanilla Bean, 2.03 lbOrgain ✓ certified | $31.98 | 2lb | $0.076 | ↑ 1.5% | View deal → |
1 product per brand · 900g+ packs only · in-stock only · ranked by $/g protein · prices updated daily from Amazon.com.
// cheapest_yeast_protein_us
Fermented yeast protein is a complete vegan protein source with a strong amino acid profile. It is less common and often carries a premium.
| # | Product | Price | Weight | $/g protein | 30-day change | |
|---|---|---|---|---|---|---|
| 1 | RNWY Complete Protein, 25g Yeast Protein + 5g Creatine Monohydrate, Vegan, Dairy-Free, Informed Sport Certified, Post-Workout Recovery for Endurance Athletes, Chocolate, 21 ServingsRNWY ✓ certified | $49.99 | 2lb | $0.095 | unchanged | View deal → |
1 product per brand · 900g+ packs only · in-stock only · ranked by $/g protein · prices updated daily from Amazon.com.
// top_pick_per_type
Best Pea Protein: NAKED
NAKED Pea - 5LB 100% Pea Protein Powder from North American Farms - Unflavored Vegan Pea Protein Isolate - NSF Certified, Plant Protein Powder, Easy to Digest - 76 Servings is the best-value pea protein in our US ranking this month at $0.028 per gram of protein. It costs $57.99 for 5lb. See full nutrition breakdown →
Best Plant Blend: Nutricost
Nutricost Organic Rice Protein Powder (5 LB) - Gluten-Free, GMO-Free (from Brown Rice) is the best-value plant blend in our US ranking this month at $0.027 per gram of protein. It costs $49.95 for 5lb. See full nutrition breakdown →
Best Fermented Yeast: RNWY
RNWY Complete Protein, 25g Yeast Protein + 5g Creatine Monohydrate, Vegan, Dairy-Free, Informed Sport Certified, Post-Workout Recovery for Endurance Athletes, Chocolate, 21 Servings is the best-value fermented yeast in our US ranking this month at $0.095 per gram of protein. It costs $49.99 for 2lb. See full nutrition breakdown →
// how_to_choose
Which plant protein should you buy?
Pea protein is a versatile single-source choice for people avoiding dairy and soy. Plant blends, especially pea-and-rice blends, combine complementary amino acid profiles. Fermented yeast is a complete vegan option for buyers who want a newer protein source.
Why only 900g+ packs?
Small trial packs normally cost more per gram. Showing 900g+ tubs and bags makes the rankings useful for comparable full-size purchases.
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Which is the cheapest plant protein in the US right now?
The tables rank the current lowest cost per gram of protein by plant-protein type. Prices refresh daily, so check the table before purchasing.
Is plant protein as effective as whey?
Plant protein can support muscle growth when your overall protein intake is adequate. Whey is typically higher in leucine, while a well-chosen pea, soy, or complementary blend can be an effective dairy-free alternative.
How often do US plant protein prices change?
Amazon.com prices, coupons, and limited-time deals can change daily. This page updates from the live catalog after the daily price refresh.