Is Vegan Protein Powder Healthy? What a Serving Contains

Yes. A vegan protein powder is a concentrated food, protein extracted from peas, rice, soya or hemp, and in the trials it did the same job as dairy whey once the day's total protein was adequate: 38 men training for 12 weeks on 1.6 g of protein per kilogram gained the same leg muscle and strength on soya as on whey, pea protein matched whey in 161 men, and across 16 trials the protein source made no difference to absolute lean mass or strength; animal protein was favoured on percent lean mass, and adults under 50 gained about 0.41 kg more lean mass on animal protein.^{1, 2, 3} Who should avoid protein powder is a short list: anyone with kidney disease (a GP conversation), anyone allergic to the source, and, by the wording on every label, pregnant and breastfeeding women until they have asked their GP. This page is one of three: how much protein vegans need covers the food side, and protein powder for women the questions women ask.

Is vegan protein powder healthy?

It is as healthy as the food it stands in for. A 26 g serving of a typical plant protein powder is about 100 kcal, 20 g of protein and under a gram of sugar. Taken instead of a meal you cannot face, or to bring a low-protein day up to target, it is a sensible food; on top of three full meals it adds about 100 kcal to the day's total. The concern raised most, that extra protein harms the kidneys, was tested in a 2018 meta-analysis of 28 trials in 1,358 adults without kidney disease: higher-protein diets (1.5 g/kg or more, or 20% of energy or 100 g a day) did not change kidney filtration rate.⁴

Does plant protein build muscle as well as whey?

When the amount is matched, yes. In the 2021 Brazilian trial, 19 vegans on soya protein and 19 omnivores on whey, both at 1.6 g/kg a day, trained twice a week for 12 weeks: leg lean mass rose 1.2 kg in both groups, and thigh muscle size and leg-press strength rose without a difference between them.¹ In 161 young men, 25 g of pea protein twice a day matched 25 g of whey for biceps growth over 12 weeks.² Pooled across 49 trials in 1,863 adults, adding protein to a training programme raised one-rep-max strength by about 2.5 kg and fat-free mass by 0.3 kg, with no further gain above about 1.6 g/kg a day.⁵ "Is vegan protein healthier than whey?" turns on what else comes with the protein: soya protein lowered LDL cholesterol by about 3 to 4% across 43 trials, whey carries lactose and milk allergens, and neither is ranked above the other.⁶ Collagen vs whey protein sets out what each is for.

What is in a serving? Amino acids, leucine and the blend

Protein quality is about the nine essential amino acids, and plant isolates differ. A 2018 analysis of commercial isolates found leucine ranging from 5.1% of the protein in hemp to 13.5% in corn, with methionine and lysine lower in most plant isolates than in milk.⁷ Pea is short of methionine and rice of lysine, which is why the two are blended: on the digestibility score regulators use, pea or rice alone fall below 75, while blends, soya and whey score higher.⁸ Collagen is animal protein, so it is off a vegan list; is there a vegan collagen covers what plant "collagen" products contain.

In 24 men, a 6.25 g dose of whey topped up to about 3 g of leucine matched a full 25 g dose for muscle protein synthesis at rest, though only the full dose held for five hours after exercise.⁹ Younger men reached the ceiling at about 0.24 g of protein per kilogram in a meal, older men needed 0.40 g/kg.¹⁰ The sports-nutrition position stand puts a dose at 20 to 40 g of protein with 700 to 3,000 mg of leucine.¹¹ Read a powder's protein and leucine per serving against those figures.

How much protein do adults need?

The 1991 UK dietary reference value is 0.75 g of protein per kilogram of body weight a day, carried in the government's dietary recommendations as 45 g for women and 55.5 g for men aged 19 to 64.¹² That prevents deficiency; it is not the amount that best supports training or ageing muscle. The sports-nutrition position stand puts people who train at 1.4 to 2.0 g/kg, the 49-trial meta-analysis found the benefit plateaued at about 1.6, and for over-65s the PROT-AGE group recommends 1.0 to 1.2 g/kg, more if active.^{5, 11, 13} A 65 kg woman training three times a week therefore has a target of about 80 to 100 g, spread across the day, which is where a 20 g serving earns its place. The same arithmetic for people eating very little is on how much protein you need on Mounjaro.

Who should avoid protein powder?

Kidney disease. The PROT-AGE paper names people with severe kidney disease (an eGFR under 30, not on dialysis) as the one group who may need to limit protein, and anyone with a diagnosed kidney condition sets their target with their GP or renal dietitian, not a tub.¹³ Allergy: soya is a labelled allergen, and powders made on shared lines declare milk or gluten traces. Pregnancy and breastfeeding: food-supplement labels say to consult your GP if pregnant or lactating; the NHS asks pregnant women to eat protein-rich foods every day, and a powder is a food, but the conversation covers the whole diet and anything else blended into the tub.¹⁴ That is also why some doctors and dietitians advise asking first. Bloating, the common downside, usually traces to the sugar alcohols, gums and added fibre in some powders; a smaller first serving in more water settles most of it.

Are protein powders tested for heavy metals?

Plants take up arsenic and cadmium from soil, rice more than most, so the question is fair. A 2020 risk assessment re-ran the numbers from two US surveys of heavy metals in protein powders: at one or three servings a day no product reached a level that would raise health risk, the hazard came from arsenic or cadmium rather than lead, and the highest readings were in mass-gain products.¹⁵ Protein powders are foods and sit under the UK's contaminant limits for food; ask any maker whether every batch is tested and the certificate of analysis available.

When is the best time to take plant protein?

Within the day, not within a window. The position stand's view is that the muscle's response to a session lasts a day or more, so a serving before or after training both work, and spacing protein every three to four hours matters more.¹¹ After exercise a full serving kept synthesis up for five hours where a leucine-topped small one did not, so use the whole serving.⁹ A shake replaces protein, not fluid or salt; for long, hot sessions see what electrolytes are and what they do.

Frequently asked questions

Is it safe to drink vegan protein powder every day?

For a healthy adult, yes, as part of the day's total protein; 28 trials found no change in kidney function on higher-protein diets.⁴ Count it as food: about 100 kcal a serving.

Is there a vegan protein shake that is good for weight loss?

No shake has a weight-loss trial behind it, and none may claim one. Protein's job while eating less is to keep muscle; the targets are on does Mounjaro cause muscle loss.

Which type of vegan protein is best?

At least 20 g of protein a serving, a leucine figure on the label, a blend or soya base to cover methionine and lysine, and little sugar.^{7, 8} No trial has ranked brands.

Which is better for high cholesterol, whey or plant protein?

Soya protein has the trial record: about 3 to 4% lower LDL at 25 g a day.⁶ Pea and rice have not been tested for cholesterol. Anyone on a statin keeps taking it.

Sources

1. Hevia-Larraín V, et al. High-protein plant-based diet versus a protein-matched omnivorous diet to support resistance training adaptations: a comparison between habitual vegans and omnivores. Sports Medicine, 2021. PubMed 33599941.
2. Babault N, et al. Pea proteins oral supplementation promotes muscle thickness gains during resistance training: a double-blind, randomized, placebo-controlled clinical trial vs. whey protein. Journal of the International Society of Sports Nutrition, 2015. PubMed 25628520.
3. Lim MT, et al. Animal protein versus plant protein in supporting lean mass and muscle strength: a systematic review and meta-analysis of randomized controlled trials. Nutrients, 2021. PubMed 33670701.
4. Devries MC, et al. Changes in kidney function do not differ between healthy adults consuming higher- compared with lower- or normal-protein diets: a systematic review and meta-analysis. Journal of Nutrition, 2018. PubMed 30383278.
5. Morton RW, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine, 2018. PubMed 28698222.
6. Blanco Mejia S, et al. A meta-analysis of 46 studies identified by the FDA demonstrates that soy protein decreases circulating LDL and total cholesterol concentrations in adults. Journal of Nutrition, 2019. PubMed 31006811.
7. Gorissen SHM, et al. Protein content and amino acid composition of commercially available plant-based protein isolates. Amino Acids, 2018. PubMed 30167963.
8. Herreman L, et al. Comprehensive overview of the quality of plant- and animal-sourced proteins based on the digestible indispensable amino acid score. Food Science and Nutrition, 2020. PubMed 33133540.
9. Churchward-Venne TA, et al. Supplementation of a suboptimal protein dose with leucine or essential amino acids: effects on myofibrillar protein synthesis at rest and following resistance exercise in men. Journal of Physiology, 2012. PubMed 22451437.
10. Moore DR, et al. Protein ingestion to stimulate myofibrillar protein synthesis requires greater relative protein intakes in healthy older versus younger men. Journals of Gerontology Series A, 2015. PubMed 25056502.
11. Jäger R, et al. International Society of Sports Nutrition position stand: protein and exercise. Journal of the International Society of Sports Nutrition, 2017. PubMed 28642676.
12. Public Health England. Government dietary recommendations: energy and nutrients for males and females aged 1 to 18 years and 19+ years, 2016. gov.uk.
13. Bauer J, et al. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. Journal of the American Medical Directors Association, 2013. PubMed 23867520.
14. NHS. Have a healthy diet in pregnancy. nhs.uk/pregnancy/keeping-well/have-a-healthy-diet.
15. Bandara SB, Towle KM, Monnot AD. A human health risk assessment of heavy metal ingestion among consumers of protein powder supplements. Toxicology Reports, 2020. PubMed 33005567.

General information, not medical advice: anyone with kidney disease, a food allergy, or who is pregnant or breastfeeding talks to their GP before adding a protein powder.