Myprotein Impact Vegan Protein review

Our take: the value vegan protein to beat

Myprotein’s Impact Vegan Protein does what our Gold Standard Plant review wished that product did: it delivers the same amount of plant protein per scoop at roughly half the price per gram. A 30 g scoop gives about 24 g of protein from pea and fava bean, around 117 kcal and only about 0.2 g of salt, with a short ingredient list.

The research on plant protein is encouraging: for most people who reach their daily protein target, a pea-based powder supports muscle gains as well as whey. That leaves price, testing and tolerance as the differences between vegan powders — and on price, this is hard to beat.

The trade-offs are small. The listings we read make no banned-substance testing claim, so drug-tested athletes should look elsewhere. And fava bean is a caution for people with G6PD deficiency.

This is a desk review. We have read the published label details, UK listings and the research on plant protein and resistance training. We have not used this product, tested its contents or run a trial. We could not open Myprotein’s own product page while writing, so the next section says where each figure came from.

What exactly are you buying?

Impact Vegan Protein is sold in 1 kg and 2.5 kg pouches in several flavours. A serving is 30 g, so a 1 kg pouch holds about 33. Per serving, listings give about:

• 24 g of protein
• About 117 kcal
• About 0.2 g of salt

The chocolate version’s ingredient list is: protein blend (87 per cent: pea protein isolate and fava bean isolate), fat-reduced cocoa powder, natural flavourings, a vegetable creamer made from high-oleic sunflower oil, a thickener (xanthan gum) and the sweetener sucralose. Other flavours differ slightly, and Myprotein notes that nutrition figures vary by flavour.

Two points stand out against Optimum Nutrition’s plant protein. The salt is about a quarter as much per scoop — roughly 0.2 g against 0.8 g. And the protein comes from pea and fava bean rather than pea and rice. Both pairings aim to fill gaps in each other’s amino acid profile; the research on pea protein applies to either.

Does plant protein build muscle as well as whey?

For most people, yes, provided total protein is enough. In a 2015 randomised trial by Babault and colleagues, 161 young men doing 12 weeks of resistance training took pea protein, whey or a placebo. Muscle thickness increased similarly with pea and whey, and the pea group gained significantly more than placebo.

Across the whole diet, a 2021 study by Hevia-Larraín and colleagues found habitual vegans and omnivores on protein-matched diets of about 1.6 g per kilogram a day gained similar muscle and strength over 12 weeks. A 2018 meta-analysis by Messina and colleagues found the same for soy against animal protein.

The rule is the same as for any protein powder: reach your daily total first. A 2018 meta-analysis by Morton and colleagues found gains in fat-free mass levelled off at around 1.6 g of protein per kilogram of body weight a day. Our protein calculator works out your figure.

Fava bean and G6PD deficiency

Fava beans (broad beans) can trigger a serious breakdown of red blood cells — favism — in people with G6PD deficiency, an inherited condition more common in people of Mediterranean, African, Middle Eastern and South Asian heritage. The NHS advises people with G6PD deficiency to avoid broad beans.

Whether a purified fava bean protein isolate carries the same risk is not well established, because processing may remove much of the compounds responsible. We would not rely on that. If you have G6PD deficiency, or are unsure whether you do and have a family history, choose a pea and rice protein instead, or ask your GP.

Testing

The listings we read made no banned-substance testing claim, such as Informed Sport, for this product. For an ordinary gym-goer that is a low risk from a large, established brand. For an athlete under anti-doping rules, strict liability applies: choose a product whose batch you can look up. Gold Standard 100% Plant is on Optimum Nutrition’s own list of Informed Sport registered products.

Price: work it out per 100 g of protein

At about 24 g of protein per 30 g scoop, a 1 kg pouch holds roughly 790 g of protein and a 2.5 kg pouch about 2 kg. In listings read on 28 September 2026:

• 1 kg: £19.99 on offer on Myprotein’s UK store, down from £24.99 — about £2.52 to £3.16 per 100 g of protein, or 60p to 76p a scoop.
• 2.5 kg: £42.99 at the lowest listing on a price comparison site — about £2.16 per 100 g of protein.

Against Optimum Nutrition Gold Standard 100% Plant at about £4.36 to £5.56 per 100 g of protein, that is roughly half the price for the same protein per scoop. Myprotein runs frequent site-wide offers, and it is rarely worth paying full price. We read these prices from listings rather than taking an order through checkout.

Best alternatives

The ones we have fully reviewed are linked, and appear in the comparison cards below this article. The others we name for comparison only: we have not reviewed them in full, so do not read their inclusion as a recommendation.

• Optimum Nutrition Gold Standard 100% Plant (reviewed) — pea and rice rather than pea and fava, and Informed Sport registered, but about twice the price per gram and with about four times the salt. The better choice for drug-tested athletes and people with G6PD deficiency.
• Bulk Vegan Protein Powder (reviewed) — the other value-brand vegan powder, listed at 23 g of protein per serving and 28 servings per 1 kg.
• Soya milk, tofu, tempeh and lentils — the food route. A 500 ml glass of soya milk gives roughly 15 to 18 g of protein, and most vegans can reach their target from planned meals.
• Myprotein Impact Whey (reviewed) — if you eat dairy, the whey equivalent from the same brand.

Who should skip it, and what to watch for

Skip it if you have G6PD deficiency, or a pea or legume allergy. Some people find pea protein causes wind or bloating at first; starting with half a scoop helps. Check the may-contain statement on your pack if you have other allergies.

Anyone with kidney disease should ask their GP or dietitian before increasing protein. Food supplements sold in Great Britain are not approved by a regulator for safety or effectiveness before sale, so the label is the manufacturer’s responsibility rather than a regulator’s endorsement.

Sources and shopping: our UK buying checklist

Before you order, check the flavour, the pack size and the delivered price. Work out the cost per 100 g of protein — price ÷ (servings × protein per serving) × 100 — and compare it on the day with other vegan powders. The 2.5 kg pouch is the cheapest per gram if you will finish it before its best-before date.

When the pouch arrives, check the seal, the batch code and the best-before date, and read the nutrition panel and allergen statement for your flavour.

Our commercial link for this product is our Myprotein Impact Vegan Protein link. It earns us a commission at no extra cost to you, and it has no influence on the score above — which is an 8.2, the highest of the protein powders we have reviewed, held back only by no testing claim and the fava bean caution.

The fair summary is this. Myprotein Impact Vegan Protein gives you the same plant protein per scoop as the premium brands for about half the price. For most vegans and dairy-free lifters, it is the one to beat.