Is Cricket Protein Good for Your Gut? What the Chitin Research Actually Shows

Most conversations about cricket protein stop at the protein. That is understandable — it is the headline number on the packet. But the more interesting thing about crickets, at least to nutrition researchers, is the part that isn't protein at all: chitin, the fibrous material that makes up the insect's exoskeleton.

Chitin is unusual because it is a fibre from an animal source. Chicken, fish, beef and eggs contain essentially no dietary fibre. Crickets do. That single quirk is why cricket protein keeps showing up in gut microbiome research, and it is worth looking at what that research actually found — including the parts that are less impressive than the headlines suggest.

Why fibre matters in the Singapore context

The Health Promotion Board recommends a daily dietary fibre intake of 20g for women and 26g for men, which the Department of Dietetics at Singapore General Hospital translates to roughly two servings of fruit and two of vegetables a day — half a plate of produce at every meal (HealthXchange / SGH).

Anyone who has eaten three hawker meals in a day knows how easy that target is to miss. Fibre also does more than keep you regular: SGH's dietitians note that soluble fibre slows the release of sugars into the bloodstream and can help lower LDL cholesterol, while insoluble fibre adds bulk and speeds transit. Snacks are one of the few remaining slots in a Singaporean day where fibre can quietly be added or quietly be lost.

The one human trial worth knowing about

In 2018, researchers at Colorado State University published a double-blind, randomised crossover trial in Scientific Reports. Twenty healthy adults ate breakfast foods containing 25g/day of whole cricket powder for 14 days, then — after a washout period — the control version, with blood and stool samples taken throughout.

Three findings stand out:

  • It was tolerable and non-toxic at that dose, with no adverse effect on liver function markers.
  • Bifidobacterium animalis, a probiotic gut bacterium, increased 5.7-fold during the cricket period.
  • Plasma TNF-α, a marker of systemic inflammation, was reduced.

The authors' own conclusion is appropriately careful: eating crickets may improve gut health and reduce systemic inflammation, but more research is needed to understand the effects and the mechanisms behind them.

The honest caveats

We'd rather flag the limitations than let you find them yourself. Twenty participants is a small trial. Fourteen days is a short intervention. A 5.7-fold rise in one bacterial genus is a measurable shift in the microbiome, not a proven health outcome — nobody has yet shown that this translates into fewer illnesses or better long-term markers.

And 25g of cricket powder per day is considerably more than you would get from a packet of crackers. That dose was chosen to test an effect, not to describe normal snacking.

A 2023 Nature Food perspective, "Chitin and omega-3 fatty acids in edible insects have underexplored benefits for the gut microbiome and human health", makes the same point at field level: laboratory, animal and human studies all indicate that insect fibre in the form of chitin and its derivatives can modify gut microbiota with beneficial outcomes — but the authors explicitly identify a dearth of human studies as the central gap in the literature. Promising is not the same as proven.

What the lab work adds

Most of the supporting evidence sits one step removed from real eating. A 2021 study in Foods, "In Vitro Study of Cricket Chitosan's Potential as a Prebiotic", deacetylated cricket chitin into chitosan and added it to bacterial growth media. Every concentration tested significantly increased populations of probiotic bacteria — Lactobacillus fermentum, L. acidophilus and Bifidobacterium adolescentis — while decreasing populations of pathogenic bacteria, with the clearest inhibition of Salmonella typhi at a 10% chitosan concentration.

That is a genuinely interesting result. It is also a petri dish. In vitro findings tell you what a compound can do under controlled conditions; they don't tell you what happens after chewing, stomach acid, and a mixed diet get involved.

So what's the reasonable takeaway?

Cricket protein is a complete protein that happens to bring a fibre most animal-derived foods lack. There is one small but well-designed human trial pointing in a positive direction, a body of lab work consistent with it, and a research community openly saying it needs more human data.

The sensible position is neither dismissal nor hype. If you already eat snacks, choosing one that contributes some fibre and protein rather than mostly refined starch is a small, low-risk improvement — and the potential microbiome upside is a bonus that may or may not materialise at snacking doses. Fibre from vegetables, fruit and whole grains remains the foundation; nothing in this research changes that.

Where HexaCrunch fits

Our baked brown-rice crackers are made with cricket protein, which is where the chitin comes from. We're not going to tell you a packet of crackers will remodel your microbiome — the honest read of the evidence doesn't support that claim. What we will say is that they're a baked, whole-grain-based snack with real protein in it, which is a better default than most things in the biscuit aisle. If you'd like to try them, the Try-All 3-Pack is the easiest place to start.

Sources

This article is general information, not medical advice. If you have a digestive condition or a shellfish allergy, speak to your doctor — people allergic to crustaceans may also react to insect protein.

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