Pea protein and rice protein are both plant-derived protein ingredients, but finished powders can differ substantially. Compare protein per serving, the serving weight, the other ingredients, allergens and flavour before deciding. The plant named on the front does not describe everything in the tub.
When comparing pea protein vs rice protein, separate the general ingredient from the specific recipe. A chocolate rice powder containing fibre and caffeine sources is a different product from plain rice protein isolate, just as a botanical pea blend differs from a single-ingredient pea powder.
What do the names mean?
Pea protein is obtained from peas, while rice protein is obtained from rice. Processing concentrates the protein, so a scoop is not nutritionally identical to a portion of cooked peas or rice. The finished ingredient may be blended with flavourings, fibre and other substances.
The British Nutrition Foundation’s protein guidance emphasises getting protein from a range of foods. A powder is an optional convenient format, rather than a requirement for everyone who follows a plant-based diet.
Beans, lentils, tofu, nuts, seeds and other foods can also form part of that dietary pattern. A supplement comparison should sit within your overall food intake rather than replace meals with a product because it carries a large protein headline.
Does the amino-acid profile matter?
Proteins are made from amino acids. Different ingredients have different amino-acid proportions, so source can matter when comparing formulations. However, the source name is not a complete analysis of a finished product’s protein quality.
A study of commercially available protein isolates found variation in protein content and amino-acid composition between sources. It was a composition study, not a trial proving that one shop-bought pea or rice powder gives better results. Do not treat its findings as evidence for a particular branded blend.
For most shopping comparisons, start with the declared protein amount and your diet as a whole. A detailed amino-acid panel is useful when available, but a word such as “complete” should not replace checking what has actually been disclosed.
Two current powders compared
The live BioBodyBoost PeaPro listing states 18.1g protein and 2.6g fibre in a 25g serving. It combines pea protein isolate with chicory root fibre and several botanical ingredients.
The BioBodyBoost RicePro Chocolate listing states 16.9g protein and 2.7g fibre in a 25g serving. Its ingredients include brown rice protein, chicory root fibre, cocoa, green tea and guarana extracts.
| Listed detail | PeaPro | RicePro Chocolate |
|---|---|---|
| Serving weight | 25g | 25g |
| Protein per serving | 18.1g | 16.9g |
| Fibre per serving | 2.6g | 2.7g |
| Pack weight | 500g | 500g |
| Servings at the listed weight | 20 | 20 |
These numbers describe these two recipes, not every pea and rice powder. They also show why 25g powder is not the same as 25g protein. Other ingredients contribute to the scoop’s weight.
Check caffeine and added ingredients
RicePro contains guarana and green tea extracts. The listing says that a caffeine amount per serving is not published. If you are avoiding caffeine or need to know the amount, obtain clarification before choosing it rather than assuming that a protein shake is caffeine-free.
PeaPro also lists green tea among its ingredients. Do not infer a caffeine-free claim from the product name or from the absence of guarana. Ask about any undisclosed detail that affects your suitability decision.
Added fibre, sweeteners and botanical ingredients may also matter to your preferences and tolerance. Check the complete ingredient panel rather than choosing only on a protein gram comparison.
What about bloating?
Different recipes can be experienced differently by different people. If a shake is uncomfortable, consider the serving, additional ingredients and what you mix it with. Changing from rice to pea does not guarantee that the issue will disappear.
Our guide to protein shakes and bloating looks at that question in more detail. Do not repeatedly increase or switch supplements when symptoms are persistent or worsening; seek appropriate advice.
Vegan does not mean allergen-free
Both example products are listed as suitable for vegans and vegetarians. Dietary suitability and allergy safety are separate checks. Their listings also contain information about manufacturing facilities handling other food ingredients.
A plant-based powder can have a cross-contact warning, contain a relevant allergen in its recipe, or be mixed into a drink containing an allergen. If you have a food allergy, review the specific pack and clarify uncertain information with the manufacturer or retailer before use.
For readers comparing dairy-based powders as well, our clear protein and whey comparison covers a separate set of ingredient and format questions. A plant-based product should not be compared with a whey recipe as if only the flavour has changed.
How to compare price and servings
Divide the current tub price by its number of complete servings. Then record how much protein each serving supplies. This keeps a cheap but small scoop from looking equivalent to a different recipe with a larger protein amount.
Also consider whether the flavour and mixing instructions suit your use. The amount of liquid changes texture but does not change the grams of protein in the powder serving; a milk or milk alternative can add its own nutrients.
Use the scoop and directions supplied with the product. Scoops from different tubs can have different capacities, and a heaped scoop is not interchangeable with a level scoop.
Frequently asked questions
Is pea protein always higher in protein than rice protein?
No. Compare the finished labels. The two examples here differ, but their recipes do not represent every product using those ingredients.
Does a 25g scoop contain 25g protein?
Not necessarily. Scoop weight includes all the powder’s ingredients. Read the separate protein amount in the nutrition panel.
Are plant-based protein powders caffeine-free?
Not automatically. Check for ingredients such as guarana or green tea and ask for the caffeine amount if it matters to you.
Can a vegan powder still have an allergy warning?
Yes. Vegan labelling does not establish that a product is free from allergens or manufacturing cross-contact.
Do I need a protein powder on a vegan diet?
Not automatically. Review your food intake first. A dietitian can help if you are unsure about meeting your nutritional needs.
Explore the recipes
Browse the powders and drink mixes collection and compare full recipes, protein per serving and suitability. If you have a medical condition or a prescribed dietary restriction, ask a healthcare professional before changing your protein intake.