“Beans proteins are not good as animal proteins”

NutritionMetabolismAging

4/5 evidence score15 peer-reviewed studies

What the science says

Peer-reviewed evidence consistently indicates that bean proteins are generally of lower nutritional quality compared to animal proteins. This is primarily due to their lower digestibility and deficiencies in certain essential amino acids, such as methionine, cysteine, histidine, and tryptophan.

Full analysis

Multiple studies confirm that bean proteins often have an inferior amino acid profile and lower digestibility compared to animal proteins, primarily due to limiting essential amino acids and the presence of antinutritional factors. However, research also highlights that processing methods like cooking, extrusion, and fermentation can significantly enhance the digestibility and bioavailability of amino acids in beans. While beans alone may not match the complete amino acid profile of animal proteins, combining them with other plant-based protein sources (e.g., grains) can create a nutritionally complete meal, and they offer additional health benefits like fiber and micronutrients.

Key studies

Most dry bean proteins are deficient in sulfur amino acids, methionine, and cysteine, and therefore are of lower nutritional quality when compared with the animal proteins.

Sathe SK · Critical reviews in biotechnology · 2002

Dry bean proteins are typically deficient in sulfur amino acids (methionine and cysteine), resulting in lower nutritional quality compared to animal proteins.

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The value of dietary plant protein in older people.

Gueugneau M · Current opinion in clinical nutrition and metabolic care · 2023

Plant-based proteins are less anabolic than animal-derived proteins due to lower digestibility and deficiencies in some essential amino acids, though processing can improve their quality.

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True Ileal Amino Acid Digestibility and Protein Quality of 15N-Labeled Faba Bean in Healthy Humans.

Itkonen ST et al. · The Journal of nutrition · 2024

Cooked faba bean protein showed moderate ileal digestibility in humans, with overall protein quality restricted by limited histidine and tryptophan content.

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“Beans proteins are not good as animal proteins”

What the science says

Full analysis

Key studies

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