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Rpr3.5

Rice Protein Research

Mostly mechanism / observationalHigh safety

3 peer-reviewed studies

What the evidence says

Mostly mechanism / observational

Most Rice Protein studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.

Most evidence is from medium-quality randomised trials published 2013–2025 with a typical study size of 24 participants.

Based on 3 studies · 1 RCT · 24 total participants

Confidence

Low

By outcome

Muscle strength & powerSupports strength and lean-mass gains comparable to whey when dosed high (one key RCT) · 8 weeks
Too few graded studies1 study
Endurance & exercise performanceAided body composition and power output post-training in resistance-trained men · 8 weeks
Too few graded studies1 study

Active research area

1 study in the last 5 years

201320192025

1RCTn=24 · very small study2013

Post-exercise rice protein isolate, given in a large isocaloric dose, produced body-composition and strength gains comparable to whey protein in resistance-trained men.

Joy JM, Lowery RP, Wilson JM, et al. · Nutr J (2013)

8-week RCT in resistance-trained men; 48g rice protein isolate vs 48g whey isolate post-workout
Both groups gained lean body mass, strength (bench/leg press) and power with no significant between-group difference
Supports rice protein as an effective muscle-building protein when dosed high

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2In Vitro2018

Egg protein had a high essential-amino-acid content (32%) with ~7% leucine, exceeding plant-based isolates.

Gorissen SHM, Crombag JJR, Senden JMG, et al. · Amino Acids (2018)

Compared amino-acid composition of egg and other animal vs plant protein isolates by UPLC-MS/MS
Egg had high essential-amino-acid content (~32%) and ~7% leucine, far above plant isolates like rice and hemp
Confirms egg's reference-quality amino-acid profile for muscle protein synthesis

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3In Vitro2025

Rice protein showed greater stability during processing, maintaining a more balanced amino acid profile.

Peñaranda I, Garrido MD, García-Segovia P, Martínez-Monzó J, Igual M · Food Funct (2025)

Evaluated in-vitro digestibility/bioaccessibility of pea, rice, and a 50:50 blend
Rice protein remained stable during extrusion with a relatively balanced amino-acid profile
Supports the rationale for rice-pea blends to optimize amino-acid delivery

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View in Research Library

Rice Protein Research

Mostly mechanism / observational

The effects of 8 weeks of whey or rice protein supplementation on body composition and exercise performance.

Protein content and amino acid composition of commercially available plant-based protein isolates.

Effect of protein texturization on amino acids and protein in vitro bioaccessibility of pea and rice protein.