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Plant proteins: definition, sources, recipes and supplements

What are the best sources of plant proteins? Discover what non-animal products to eat, to ensure a good daily intake of protein.
Foods rich in plant proteins
Seeds are particularly high in protein.
Rédaction Supersmart.
2022-03-01Comments (0)

The plant kingdom is packed with high-quality proteins

Like all living organisms, plants contain proteins. They fulfil in plants the same type of function as they do in animals: enzymatic (they catalyse reactions), structural, mobility, cell communication, etc.

It’s proteins, for example, which determine when trees shed their leaves and how plants defend themselves against attack, as well as facilitating absorption of nutrients essential to the growth of the plant or its fruit, etc. (1-3)

For anyone keen to increase their daily protein intake, or reduce their consumption of animal-source protein (for ethical or environmental reasons), it’s thus important to know which foods are high in plant proteins.

As a reminder, daily protein intake, depending on age, objectives and level of physical activity, should be between 0.8g per kilo of bodyweight and 2g per kilo of bodyweight (the latter when building muscle mass for example) (4).

The best dietary sources of plant proteins

Given that plant proteins play a fundamental role in the development, growth and death of plants, the highest amounts are usually found in seeds (with a few exceptions: spirulina, klamath algae, moringa leaves ...)

The best plant protein sources are: (5-8)

The aim is to vary your plant protein sources over a week to create balanced meals from a variety of seeds, nuts, grains and pulses.

Vegetarian recipes to ensure a good intake of essential amino acids

Above all, however, we need to obtain specific amino acids from the protein we consume. Amino acids are actually the building blocks of proteins. While the body is able to produce 11 of them itself, 9 have to be obtained from the diet: tryptophan, lysine, methionine, phenylalanine, threonine, valine, leucine, isoleucine and histidine (9).

The problem is that these essential amino acids are not uniformly present in all plant proteins. That’s why it’s always best to combine cereals with pulses. Apart from being more digestible, this combination delivers a balanced intake of essential amino acids: the pulses offer amino acids not provided by the cereals, and vice versa.

Here are some very simple vegetarian or vegan combinations/recipes: rice (cereal) with lentils (pulses) ; corn (cereal) with kidney beans (pulses); oats (cereal) with soya (pulses)... all of which you can mix with sauteed pumpkin seeds or chopped peanuts (seeds), or sprinkle with chopped pistachios, almonds or walnuts (nuts).

Vegetarians, though not vegans, also have the option of taking a daily dose of whey protein (such as Undenatured Whey Protein Isolate), whey being a by-product of cheese production. Whey protein contains all the essential amino acids in sufficient quantities to meet the body’s needs (10).

References

  1. ROUTT, Sheri M. et BANKAITIS, Vytas A. Biological functions of phosphatidylinositol transfer proteins. Biochemistry and cell biology, 2004, vol. 82, no 1, p. 254-262.
  2. JAILLAIS, Yvon. Fonctions du rétromère dans le trafic de protéines, la polarité cellulaire et le développement d’Arabidopsis. 2007. Thèse de doctorat. Lyon, École normale supérieure (sciences).
  3. LANDRY, Jacques et HUOT, Jacques. Modulation of actin dynamics during stress and physiological stimulation by a signaling pathway involving p38 MAP kinase and heat-shock protein 27. Biochemistry and Cell Biology, 1995, vol. 73, no 9-10, p. 703-707.
  4. DEUTZ, Nicolaas EP, BAUER, Jürgen M., BARAZZONI, Rocco, et al.Protein intake and exercise for optimal muscle function with aging: recommendations from the ESPEN Expert Group. Clinical nutrition, 2014, vol. 33, no 6, p. 929-936.
  5. GUÉGUEN, Jacques, WALRAND, Stéphane, et BOURGEOIS, Oriane. Les protéines végétales: contexte et potentiels en alimentation humaine. Cahiers de Nutrition et de Diététique, 2016, vol. 51, no 4, p. 177-185.
  6. REMOND, Didier. Quelles spécificités et complémentarités nutritionnelles des aliments sources de protéines végétales et animales?. In : Journées Francophones de Nutrition. 2020.
  7. WALRAND, Stéphane, COXAM, Veronique, MORAND, Christine, et al.Rechercher les qualités nutritionnelles des protéines végétales. In : Les rencontres de l'Inra au salon de l'agriculture. 2013.
  8. CHARDIGNY, Jean-Michel. Les protéines végétales pour l’alimentation humaine.
  9. ROGERS, Quinton et LEUNG, P. MB. The influence of amino acids on the neuroregulation of food intake. In : Federation proceedings. 1973. p. 1709-1719.
  10. HA, Ewan et ZEMEL, Michael B. Functional properties of whey, whey components, and essential amino acids: mechanisms underlying health benefits for active people. The Journal of nutritional biochemistry, 2003, vol. 14, no 5, p. 251-258.
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