Onnit Plant Based Protein blends four seed-derived protein sources — watermelon seed, pumpkin seed, sunflower seed and avocado — to deliver a complete essential amino acid profile without soy, dairy, or synthetic amino acids. 33g protein per serving, 20 servings per tub, in Chocolate and Vanilla. A complete plant protein comparable to whey for muscle protein synthesis.

20 servings of complete plant protein. 33g per serving. Four seed sources, full EAA profile.

Most plant proteins have a problem: they're built on a single source - usually pea or rice - which means their essential amino acid (EAA) profile is incomplete. Some are low in lysine, others in methionine. The standard workaround is to combine pea and rice in the same formula, which improves the profile but still leaves gaps.

The Four-Source Solution

Onnit's Plant Based Protein takes a different approach. It blends four seed-derived protein sources - watermelon seed, pumpkin seed, sunflower seed and avocado - to build a complete EAA profile without relying on soy, dairy, or synthetic amino acid additions. The result is a plant protein that covers the full spectrum of essential amino acids in a single product, making it nutritionally comparable to whey for muscle protein synthesis purposes.

Why seed proteins?

Seed proteins are among the most underused protein sources in sports nutrition. Watermelon seed protein in particular has an unusually strong amino acid profile for a plant source - high in arginine, which plays a role in nitric oxide production and blood flow, alongside a solid leucine content relevant to muscle protein synthesis signalling. Pumpkin seed protein contributes additional arginine and is one of the richer plant sources of zinc. Sunflower seed protein rounds out the blend with methionine, an EAA that's typically low in legume-based proteins.

What the research says about plant vs whey

A randomised controlled trial published in the Journal of the International Society of Sports Nutrition found no significant difference in body composition, muscle thickness, or strength gains between pea protein and whey protein over 8 weeks of resistance training - provided total protein intake was matched. The gap between plant and animal protein is largely a gap in amino acid completeness, which a well-formulated multi-source blend like this one is specifically designed to close.

Who it's for

The obvious audience is vegans and vegetarians who don't want to compromise on protein quality. But it's equally well suited to anyone with lactose intolerance or a dairy sensitivity, anyone avoiding soy (common in plant proteins), and athletes who want to diversify their protein sources rather than relying entirely on whey.

How to use it

Mix one scoop (33.8g) with 250-350ml of water, plant milk, or your preferred liquid. Works well blended into smoothies or with oats. Available in Chocolate and Vanilla.

676g | 20 servings
Watermelon seed, pumpkin seed, sunflower seed, avocado protein blend. Gluten free, dairy free, soy free, sugar free. Vegan certified.

Consult your doctor if pregnant, nursing, or taking medications.

Stocked and shipped from Dublin. Order before 4pm for same-day dispatch.

Frequently Asked Questions

Is plant protein as good as whey for building muscle?

When total protein intake is matched, a randomised controlled trial found no significant difference in strength or muscle gains between plant protein and whey over 8 weeks of resistance training. The key is amino acid completeness, which this four-source blend is designed to provide.

What is Onnit Plant Based Protein made from?

Four seed-derived sources — watermelon seed, pumpkin seed, sunflower seed and avocado — combined to give a complete essential amino acid profile. No soy, dairy, or synthetic amino acids.

Is it soy free and dairy free?

Yes — it's gluten free, dairy free, soy free, sugar free and vegan certified, which suits those avoiding soy (common in plant proteins) or with a dairy sensitivity.

How much protein is in each serving?

33g of protein per serving. Each tub provides 20 servings. Available in Chocolate and Vanilla.

How do I mix it?

Mix one scoop (33.8g) with 250-350ml of water, plant milk, or your preferred liquid. It also blends well into smoothies or with oats.