Biggest Amazon Prime Day protein deals and savings on supplements

Our reviews experts price-track our tried, tested and top-rated picks of the best products featuring in our ‘best-of’ lists, to bring you honest opportunities to save.

Those that feature below do so because of their quality and value for money (among other reasons) and have been analysed by registered nutritionists, so for all the latest deals and biggest opportunities to save, you’re in the right place* (read more about how Good Food tests products). We’re already seeing offers live on and are updating this page constantly to bring you the biggest deals.

Jump to:

Best Prime Day protein and supplement deals

MyProtein Impact chocolate brownie whey protein, 1kg

Best overall protein shake

Grams of protein per serving: 21g per 25g serving

Calories per serving: 103 kcals

With a reassuringly short ingredients list, this protein powder is also suitable for vegetarians and is available in more than 40 flavours. It’s also good value for money with 40 servings in every 1kg pack, making each serving around 90p.

We loved the rich chocolate flavour and thick consistency of this protein powder which was a filling shake offering 21g of protein per 25g serving.

Read our full guide to the best protein powders.

MyVegan pea protein isolate (chocolate)

Best vegan protein powder on a budget

Grams of protein per serving: 23g per 30g serving

Calories per serving: 107 kcals

This shake is an incredibly smooth drink, even when mixed with just water alone. Not only is it great value for money, there’s also an unflavoured option if you like building your own flavours.

Read our full guide to the best vegan protein powders.

MyVegan Clear vegan protein (strawberry)

Best clear vegan protein powder

Grams of protein per serving: 10g per 16g serving

Calories per serving: 52 kcals

Gluten free and vegetarian as well as vegan, this clear protein is a great alternative for anyone who’d prefer their protein boost as a lighter juice or smoothie to the usual creamy shakes. We loved the strawberry and blackcurrant flavours best.

Vitl salted caramel energy bar

Best protein bar with vitamins

Star rating: 5/5 stars

Grams of protein per serving: 14g per 40g bar

Calories per serving: 143 kcals

This little bar is packed with vitamins and minerals as well as 14g of protein per serving. We liked the chewy, fudgy texture similar to a chocolate brownie and its genuinely crunchy soya protein crispness. This bar feels like a treat.

Pulsin peanut chocolate protein bar

Best vegan protein bar for filling up

Grams of protein per serving: 12.1g per bar

Calories per serving: 231 kcals

Packed with dark chocolate chips and crunchy peanuts, this filling little bar is a really satisfying snack packed with energy. It’s chewy but not too sweet and contains protein from peanut and pea sources, making it vegan-friendly.

Bulk vegan protein brownie

Best vegan protein bar as a dessert

Grams of protein per serving: 15g per bar

Calories per serving: 227 kcals

An excellent treat option, this brownie really satisfies with its dense and slightly chewy texture, topped with rich chocolate chips. Chocolate fans will love this.

MyVegan Pea-Nut Square

Best tasting vegan protein bar

Grams of protein per serving: 12g per bar

Calories per serving: 233 kcals

If you like chocolate orange flavour treats then this bar really hits as it’s bursting with citrus zing, studded with large chunks of chocolate throughout and a texture much like tiffin.

Trek Power Peanut Butter Crunch vegan protein bar

Best vegan protein bar for refuelling after exercise

Grams of protein per serving: 12g per bar

Calories per serving: 233 kcals

This bar has a melty peanut butter texture and is topped with little crispy pieces; a perfect sweet bite for that protein boost after a workout.

How much do Prime Day protein and supplement deals change?

Brands and retailers always keep a very close eye on what their competitors are doing and never more so than during sales events. Like Amazon, we expect most retailers to react to competitor price fluctuations in order to position themselves as offering the best value for money.

A pattern we’ve seen over the years is that Amazon may change its prices by pennies as well as pounds, so you’re in the right place for recommendations of real opportunities to save.