Can multi-source blends such as pea plus rice be supplied?

Beyond Biopharma | Plant Protein Peptide FAQ

Short answer: Yes. Multi-source blends such as pea plus rice are supplied either as physical blends of two or more plant peptides or as co-processed powders, and they are used mainly to broaden the amino acid profile, balance flavour and clarity, and support a simpler label story.

Two ways a blend is made

The simplest blend is a physical mix: two finished peptide powders are weighed, blended in a defined ratio and packed. It is flexible, quick and inexpensive, but it can separate during transport or handling if the two powders differ in particle size or bulk density, and the ratio in a scoop can drift if the mix is not controlled. The alternative is a co-processed blend, where the two hydrolysates are combined before drying, or blended as liquids and then dried together. That gives a more homogeneous powder with less segregation, at the cost of a longer development path.

Why pea plus rice is the classic pairing

Plant proteins are limited by different amino acids. Pea protein is relatively low in the sulphur amino acids methionine and cysteine, while rice protein is low in lysine. Combined, the two complement each other and produce a more balanced amino acid pattern than either one alone, which is why pea plus rice is the most familiar blend in plant-based nutrition. The same logic applies to other pairs: soy or corn can be used to lift a rice or pea base, and a small addition of a third source can close a remaining gap. The aim is not to reach a perfect score on paper, but to give a product an amino acid profile that supports the nutrition claim it makes.

Flavour, clarity and colour effects

Blending also changes the sensory and physical behaviour of a powder, sometimes more than the amino acid calculation suggests. Rice peptide is typically mild and clarifies well, so adding it to a pea or corn base softens the earthy, beany notes and improves the appearance of a clear drink. A darker source such as walnut, or a wheat hydrolysate with a stronger savoury note, can move the colour and taste in the opposite direction. Bitterness is not simply averaged: if one component is markedly bitter, the blend carries that note.

Labelling and allergen consequences

A blend inherits the labelling duties of everything in it. If soy, wheat or walnut is present, the usual allergen declaration applies in most markets even when the protein has been hydrolysed, and the decision on whether a hydrolysed ingredient still requires declaration belongs to the regulations of the destination market and to the finished product regulatory file. A blend also cannot borrow the claim of a single source: a product made from pea plus rice is not a pea protein product, and the ingredient list has to show both. Buyers should confirm the allergen and certification status of each component.

How a blend is specified and tested

• The ratio by weight of each peptide, with a tolerance, and the basis on which the ratio is calculated.
• Blend homogeneity, checked by sampling at several points in the batch.
• The combined specification for protein, moisture, ash, molecular weight or DH, micro limits and heavy metals.
• The amino acid profile of the finished blend, not just of the components, when a nutrition claim depends on it.
• Allergen status and any certification that the finished blend must carry.

Related reading

For more detail, see how the six plant sources compare, which parameters can be customised and plant peptide compared with whey protein.