People eat bugs for the same reasons they eat any other food: they’re nutritious, they taste good, and they’re available. More than 2,205 insect species are consumed across 128 countries, making entomophagy (the practice of eating insects) far more common globally than most Westerners realize. The reasons range from deep cultural tradition to modern environmental urgency.
Insects Are Surprisingly Nutritious
Crickets contain roughly 20.5 grams of protein per 100 grams of edible weight, nearly identical to the 20.1 grams in beef sirloin. They deliver all the essential amino acids your body needs, and they actually outperform beef in a few of them. Crickets contain more leucine (important for muscle repair) and more valine than beef does gram for gram.
Beyond protein, insects pack meaningful amounts of micronutrients. House crickets contain vitamin B12 at levels comparable to pork when measured on a dry weight basis. B12 is a nutrient most people associate only with animal products, so insects offer a high-density alternative. Iron and zinc are also present, though the amounts vary depending on the species and how the insects are raised and processed.
This nutritional density matters in parts of the world where animal protein is expensive or scarce. A handful of roasted crickets or mealworms can deliver protein, fat, and key vitamins in a compact, shelf-stable form that doesn’t require refrigeration.
The Environmental Case Is Strong
Crickets need six times less feed than cattle to produce the same amount of protein. On average, insects convert 2 kilograms of feed into 1 kilogram of body mass, while cattle require 8 kilograms of feed for the same gain. That efficiency gap is the single biggest reason environmentalists and food scientists are interested in insect farming.
Greenhouse gas emissions tell a similar story. Insect farming for human food produces between 4.2 and 25.8 kilograms of CO₂ equivalent per kilogram of protein. Beef, by comparison, generates about 35 kg CO₂e per kilogram of wet matter. Pork comes in around 6.95, and poultry at 5.97. So while insect farming isn’t zero-impact, it consistently beats conventional livestock, especially beef. The range is wide because location matters: farms in tropical climates like Thailand don’t need heating, while operations in the UK or Canada use significantly more energy to keep insects at the right temperature.
Insects also require far less land and water than cattle. They can be raised vertically in stacked containers, making them well suited to urban or space-limited environments.
Billions of People Already Eat Them
In Thailand, eating insects isn’t a novelty. It’s grocery shopping. The country’s markets sell locusts, palm weevils, silkworm pupae, bamboo caterpillars, crickets, red ants, giant water bugs, and dozens more species. Preparation varies by insect: crickets and beetles are typically roasted, locusts are fried, and many species get folded into chili pastes and salads. Fried silkworm pupae and fried bamboo caterpillar larvae are common street foods.
Mexico is another major consumer, with one of the highest numbers of edible insect species in the world. Chapulines (grasshoppers) seasoned with lime and chili are a staple in Oaxacan cuisine. Parts of Africa, South America, and East Asia have their own long traditions. In total, people in 128 countries eat insects as part of their regular diet. The idea that insects are “strange” food is largely a Western European and North American perspective, not a global one.
Why Western Countries Are Catching Up
The global edible insect market was valued at $1.35 billion in 2024 and is projected to hit $4.38 billion by 2030, growing at about 25% per year. Much of that growth is happening in Western countries that historically haven’t eaten insects.
The European Union has formally approved four insect species for human consumption: yellow mealworm larvae, migratory locusts, house crickets, and lesser mealworm larvae. These can be sold frozen, dried, or as powder. In the United States, the FDA doesn’t maintain a specific approved list of insect species but requires that insects sold as food meet the same safety and labeling standards as any other food product.
Most Western consumers encounter insects not as whole bugs on a plate but as cricket powder blended into protein bars, pasta, or baked goods. This matters because the biggest barrier in these markets isn’t nutrition or price. It’s psychology.
The Disgust Factor and How It Fades
For people raised in cultures that don’t eat insects, the initial reaction is often visceral rejection. Researchers have found that disgust toward unfamiliar foods isn’t fixed, though. It shifts with information and exposure. Studies on Western consumers show that learning about the nutritional and environmental benefits of insects measurably reduces feelings of disgust and increases willingness to try them. Educational seminars that cover the cultural, social, and practical context of insect eating are particularly effective at lowering food rejection.
This pattern isn’t unique to insects. Sushi, lobster, and raw oysters all followed similar trajectories in Western food culture, moving from “disgusting” to “delicacy” within a generation or two. Lobster was considered poverty food in colonial America. Cultural norms around food are surprisingly flexible when the right combination of information, availability, and social influence comes together.
Allergy Risks Worth Knowing
If you have a shellfish allergy, you should be cautious with edible insects. The key protein responsible for most shellfish allergies, called tropomyosin, is also found in insects. It’s present in crustaceans, mollusks, arachnids, and insects alike, which means cross-reactivity is a real concern. In Thailand’s Isan region, where insect consumption is widespread, roughly 7.4% of people reported allergic reactions after eating insects. A similar survey in Laos found that 7.6% of insect eaters experienced allergy problems.
These aren’t enormous numbers, but they’re not trivial either, especially for anyone with a known sensitivity to shrimp, crab, or other shellfish. The EU requires allergen labeling on insect-based products for this reason.
What Insects Actually Taste Like
Flavor varies enormously by species and preparation. Crickets are often described as mildly nutty, similar to toasted sunflower seeds. Mealworms have a slightly earthy, grain-like flavor. Giant water bugs, prized in Thai cooking, have a distinct flavor sometimes compared to black licorice or tarragon. Fried grasshoppers tend to take on the seasoning they’re cooked with, much like popcorn or chips.
Roasting and frying are the most common preparation methods globally because they produce a satisfying crunch and concentrate flavor. When ground into powder, most insects become nearly flavorless, which is why cricket flour works well as a protein supplement in foods where you don’t want to taste the source ingredient at all.