Can Insect Protein Build Muscle Like Whey? The Evidence

Insect protein can stimulate muscle protein synthesis. It has not proved equal to whey for building muscle over time.

Cricket and mealworm powders have a credible sustainability pitch, and the human muscle data are better than many people assume. Small randomized trials suggest insect protein can support the short-term rise in muscle protein synthesis after feeding or resistance exercise without a detectable disadvantage versus milk or whey. But acute muscle protein synthesis is a laboratory endpoint measured over hours. It does not tell us whether months of lifting with insect protein produce the same gains in lean mass, muscle size, or strength.

That distinction is the whole story. If you want an alternative protein source that can plausibly support a post-workout anabolic response, insect protein passes a cautious evidence check. If you want proof that it is a one-for-one replacement for whey, milk, or meat across a training cycle, the evidence has not arrived.

What the randomized evidence actually shows

The best overview is a 2026 systematic review of randomized controlled trials on edible insect protein and skeletal-muscle anabolism. It found only four eligible adult trials, totaling 100 participants. Two trials measured circulating amino acids alone; two measured direct skeletal-muscle anabolic responses after exercise.

In the two trials that measured muscle anabolism directly, cricket or lesser mealworm protein did not produce a statistically detectable difference from whey or milk in the acute anabolic endpoint. That is encouraging, but the review's conclusion is necessarily narrow: these trials examined short post-feeding or postexercise windows, not changes in muscle size or performance after sustained training.

Blood amino acids did not behave identically across proteins. One aminoacidemia-only study favored cricket over beef, while another favored whey over lesser mealworm. In the exercise studies, insect proteins sometimes produced lower peak plasma amino acid concentrations than whey or milk. A lower peak does not automatically mean less muscle protein synthesis over several hours, but it does mean that calling the proteins metabolically identical would be inaccurate.

The mealworm-versus-milk trial is the clearest test

The most detailed trial came from Hermans et al. in 2021. In this double-blind randomized study, 24 healthy young men consumed 30 g of lesser mealworm protein or 30 g of milk protein concentrate after unilateral resistance exercise. Investigators measured protein digestion, amino acid appearance in blood, and muscle protein synthesis for five hours. There were 12 participants in each group.

Mealworm protein delivered protein-derived phenylalanine into circulation at a similar rate to milk: 73 ± 7% versus 77 ± 7%, respectively. Both drinks significantly increased muscle protein synthesis in the rested and exercised leg, and the study found no statistically significant between-group difference. Under these specific conditions, lesser mealworm protein supplied enough amino acids to support an acute response comparable with the milk comparator.

The same trial also shows why "comparable acute response" should not become "equal protein quality." Milk produced a 27% higher peak plasma leucine concentration and a 15% higher peak plasma phenylalanine concentration than mealworm protein. The time courses for essential, nonessential, and total amino acids also differed significantly between groups.

Leucine matters because it helps stimulate the post-meal muscle-protein-synthesis response. Research in young men has found that a leucine-rich beta-lactoglobulin drink can produce acute responses comparable with a larger standard-whey dose, although that experiment tested a different protein source and cannot establish anything specific about insects. See the 2025 beta-lactoglobulin trial. The lesson is modest: amino acid composition and kinetics can matter, even when a short experimental window does not reveal a difference in muscle protein synthesis.

Why the acute result does not settle hypertrophy

Muscle protein synthesis is biologically relevant, but it is a surrogate outcome. A five-hour increase after a shake does not guarantee equal gains in muscle cross-sectional area, fat-free mass, strength, or training performance. Those outcomes depend on repeated training sessions, total protein intake, dose distribution, energy intake, recovery, adherence, and the protein's performance in ordinary meals.

This is not an argument that acute studies are useless. They test whether a protein can supply amino acids and stimulate muscle tissue after feeding and exercise. But they cannot answer the question most lifters mean by "Does it build muscle?" Long-term randomized training studies must measure the actual adaptation.

Other protein research makes this endpoint gap easy to see. A 2024 randomized crossover trial in 10 resistance-trained young adults compared 32 g of whey with a pea, brown-rice, and canola blend after leg resistance exercise and measured acute postexercise myofibrillar protein synthesis. It found equivalent acute synthesis rates, but it did not measure months-long hypertrophy or strength. Likewise, a 2025 randomized trial in 27 adults aged 50 to 70 studied 10 days of animal-focused or plant-focused diets with unilateral resistance training. It measured integrated myofibrillar protein synthesis, not long-term changes in body composition or strength.

Those studies do not prove insect protein works. They illustrate why researchers separate an acute anabolic measurement from a training outcome. The insect-protein literature has not yet supplied convincing longer-duration randomized trials that close that gap.

The comparators were not perfectly matched

Even the mealworm-versus-milk experiment was not a clean test of two perfectly matched protein products. Both interventions provided 30 g protein and were matched for total measured amino acids, but mealworm provided 2.5 g leucine and 10.2 g essential amino acids, while milk provided 2.8 g leucine and 11.0 g essential amino acids. The mealworm product also contained substantially more energy and fat.

These differences do not erase the null between-group result for acute muscle protein synthesis. They do limit what the result can mean. Similar short-window synthesis could reflect a genuine ability of the mealworm protein to compensate for lower peak amino acids, differences in digestion or food matrix, or simply the limited precision of a trial with 24 people. The study does not separate those explanations.

Who was studied—and who was not

The strongest direct trial enrolled healthy young men and excluded people doing high-frequency exercise or structured resistance training. That population is useful for a tightly controlled metabolism experiment, but it is not the same as experienced lifters using insect protein throughout a demanding program.

We also lack solid insect-protein evidence in women, older adults, people with sarcopenia, and trained athletes. These populations can differ in anabolic responsiveness. For example, a 2025 study in young women tested postexercise myofibrillar protein synthesis after 1.5 g essential amino acids or 15 g and 20 g whey; it illustrates that protein-dose research cannot automatically be carried over from male-only experiments. It says nothing direct about mealworm or cricket protein, but it reinforces the need for insect studies in the people expected to use the products.

Sustainability is promising, but it answers a different question

Edible insects can provide substantial protein and may require less land and water, have favorable feed conversion, and generate less global-warming potential than conventional livestock systems. A 2025 narrative review of edible insects describes those potential environmental advantages while also noting consumer acceptance, processing, and regulatory barriers.

That environmental case can justify trying insect protein if you enjoy it and tolerate it. It cannot substitute for muscle-outcome data. A food can be environmentally attractive and still need proper trials before anyone calls it interchangeable with whey for hypertrophy.

Current evidence supports insect protein as an alternative acute anabolic protein source. It does not yet establish equal long-term gains in muscle mass or strength.

Verdict for biohackers

Use insect protein as a sustainability-forward protein option, not as a proven upgrade. The available randomized human trials suggest cricket and lesser mealworm protein can support acute postprandial or postexercise muscle anabolism without a detectable disadvantage versus animal-protein comparators. That is a real finding, even if the evidence base is only four trials and 100 adults.

For a goal as practical as maximizing hypertrophy or strength, whey, milk, and meat still have the more established track record simply because they have been studied more extensively over longer periods. Insect protein may eventually earn equal status, but that will require randomized training trials in trained men and women that measure lean mass, muscle size, and strength under standardized diets and programs. Until then, the honest claim is narrower: it can trigger an acute anabolic response; it has not yet proved equal long-term muscle-building performance.