Researchers developed a high-protein plant-based beverage from cashew nut byproducts and found it performed similarly to whey protein and milk in a satiety crossover trial of 27 healthy adults . The beverage was well-tolerated with no differences in gastrointestinal symptoms, though the study was small and acute in nature.
Food waste from cashew nut processing presents a practical resource problem: substantial protein-rich byproducts go underutilized. Researchers in this trial addressed that constraint by developing a beverage formulation using two cashew byproducts: partially defatted cashew nut cake and cashew nut protein concentrate. The approach makes economic sense for cashew-processing regions while potentially offering nutritional value to consumers seeking plant-based protein options.
The final formulation, selected through sensory testing with 81 panelists, delivered 35.39 grams of protein per 400 mL serving (roughly equivalent to a standard whey protein shake). The beverage also contained a complete amino acid profile covering both essential and nonessential amino acids, oleic acid as its predominant fatty acid (44%), and measurable antioxidant compounds including phenolic content and DPPH values. The sensory profile was vanilla-flavored, suggesting palatability was achievable without heavy processing or masking agents.
The acute clinical trial compared three isocaloric and nutritionally equivalent beverages across 27 healthy individuals using a randomized, blinded crossover design: the cashew nut beverage, a whey protein control, and a cow's milk control. Satiety was measured via Visual Analog Scale (VAS) at multiple timepoints, with subsequent food intake tracked through dietary records. Researchers also collected gastrointestinal symptom questionnaires to capture adverse effects. The key finding was equivalence: no statistically significant differences emerged among the three beverages in satiety perception, subsequent energy intake, or gastrointestinal symptoms. This suggests the cashew beverage performed as well as established dairy and whey protein baselines.
The study's sustainability angle is worth noting. Cashew nut processing generates substantial byproduct streams across major producing regions. Developing viable beverage formulations from these materials could reduce waste, create value from existing agricultural output, and diversify plant-based protein sources beyond soy, pea, and rice isolates that currently dominate the market. The antioxidant content detected in the beverage also indicates that whole-food components were retained during processing, though the functional significance of those levels remains unclear from this acute trial alone.
If you consume plant-based protein beverages or are considering them, this research adds another option to evaluate based on taste and cost rather than performance. The study does not suggest the cashew beverage is superior to whey or milk for satiety or tolerance; it shows equivalence. That distinction matters: equivalence in a small, acute trial does not establish long-term superiority or additional health benefits.
For those with soy or legume allergies seeking protein beverage alternatives, a cashew-based option might reduce exposure to common allergens while maintaining protein and amino acid delivery. However, tree nut allergies would preclude this choice.
The environmental sustainability claim depends on regional context. Cashew processing already occurs at scale in certain regions (primarily West Africa and India). Using byproducts for beverage production makes sense where that infrastructure exists; it would not reduce overall environmental impact if cashew cultivation is expanded solely to supply this market.
From a practical standpoint, protein-at-every-meal is the relevant habit layer. The beverage format provides one vehicle for that habit, but the source (cashew, whey, dairy, pea, soy) appears less critical than consistency and total daily protein intake, based on current evidence.
| Parameter | Details |
|---|---|
| Study type | Randomized controlled trial (crossover, acute) |
| Sample size | 27 healthy adults |
| Duration | Single acute session per beverage (crossover design) |
| Primary outcome | Satiety perception (Visual Analog Scale) and subsequent energy intake |
| Secondary outcomes | Gastrointestinal symptoms, physiochemical properties |
| Beverage protein content | 35.39 g per 400 mL |
| Comparators | Whey protein beverage, cow's milk beverage (isocaloric, nutritionally matched) |
| Key finding | No significant differences in satiety, energy intake, or GI symptoms |
| Journal | Journal of Food Science |
| PubMed ID | 42322172 |
Primary study: Development and Satiety Effect of a High-Protein Plant-Based Beverage From Cashew Nut (Anacardium occidentale L.) Byproducts: A Crossover Randomized Trial. Journal of Food Science. PubMed: 42322172
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