Chayote is a strong choice for people managing diabetes. With only 9 grams of carbohydrates and 3 grams of fiber per medium fruit, it has a favorable nutritional profile for blood sugar control. Clinical research backs this up: a meta-analysis of six clinical trials found that chayote supplementation significantly lowered both fasting blood glucose and HbA1c levels over three and six months.
Nutritional Profile for Blood Sugar Control
Chayote’s carbohydrate-to-fiber ratio is what makes it particularly useful for diabetes management. A single medium chayote delivers 9 grams of carbs alongside 3 grams of fiber, meaning roughly a third of its carbohydrate content is fiber that your body doesn’t convert to glucose. For comparison, a medium potato contains about 37 grams of carbs with only 4 grams of fiber.
That fiber is a mix of soluble and insoluble types. The soluble fiber slows down how quickly sugar enters your bloodstream after a meal, helping prevent the sharp glucose spikes that make diabetes harder to manage. Chayote is also considered a low glycemic index food, meaning it raises blood sugar gradually rather than all at once. On top of that, it’s rich in polyphenols, flavonoids, and other plant compounds with antioxidant and anti-inflammatory properties, both of which matter when you’re dealing with the chronic low-grade inflammation that accompanies diabetes.
What the Clinical Evidence Shows
A 2025 systematic review and meta-analysis pooled data from six clinical trials involving older adults (ages 60 to 71) who took chayote in capsule form. The results were notable. After three months, fasting blood glucose dropped by an average of 20.56 mg/dL compared to controls. After six months, the reduction was 12.96 mg/dL, still statistically significant.
HbA1c, the measure of average blood sugar over the previous two to three months, also improved substantially. At three months, HbA1c fell by 1.12 percentage points. At six months, it was still 0.92 points lower. To put that in perspective, many oral diabetes medications aim for an HbA1c reduction of 0.5 to 1.5 points, so chayote’s effect in these trials falls within a meaningful range.
It’s worth noting that these trials used concentrated chayote capsules rather than the whole fruit eaten as food, so the doses of active compounds were likely higher than what you’d get from a typical serving at dinner. Still, the direction of the evidence is consistent: chayote’s compounds have real glucose-lowering effects in humans, not just in lab animals.
How Chayote Affects Blood Sugar
Animal research has started to explain what’s happening at the biological level. A study on diabetic mice found that pectin extracted from chayote improved blood sugar through several pathways at once. It increased the release of GLP-1, a hormone that stimulates insulin production after meals (the same hormone targeted by popular diabetes medications like semaglutide). It also boosted the liver’s ability to store glucose as glycogen, pulling excess sugar out of the bloodstream, and reduced insulin resistance.
Chayote also appears to influence gut health in ways that matter for blood sugar. The pectin shifted the balance of gut bacteria toward more beneficial species, improved the gut lining’s integrity, and increased production of short-chain fatty acids. These fatty acids act as chemical signals between the gut and liver, helping both organs handle glucose more effectively. Separately, compounds in chayote inhibit an enzyme called alpha-amylase, which breaks down starch into sugar during digestion. By partially blocking this enzyme, chayote slows the rate at which carbohydrates convert to glucose in your bloodstream.
Best Ways to Prepare It
How you cook chayote matters for preserving its beneficial compounds. Research comparing different cooking methods found that steaming retained the most bioactive compounds overall. Steamed chayote kept higher levels of the plant chemicals responsible for its antioxidant and enzyme-inhibiting properties compared to other methods. Microwaving and blanching also performed reasonably well.
Boiling, on the other hand, tends to leach water-soluble nutrients into the cooking liquid. If you prefer boiling, using the liquid in a soup or broth helps you recapture some of those lost compounds. Raw chayote is perfectly edible (sliced thin in salads, for example), though interestingly, cooked chayote showed higher levels of certain flavonoids than raw, likely because heat breaks down cell walls and releases compounds that were previously locked inside the plant tissue.
Chayote is versatile enough to work in stir-fries, soups, stews, and salads. You can eat the skin, seeds, and flesh. Because of its mild flavor and slight crunch, it absorbs seasonings well and works as a lower-carb substitute in dishes where you might otherwise use potato or squash.
Practical Tips for Adding Chayote to Your Diet
There’s no established “dose” of whole chayote for diabetes management, but its low carbohydrate load means you can be fairly generous. One medium chayote adds only 9 grams of carbs to a meal, so even two servings won’t spike your carb count the way starchier vegetables would. Pairing chayote with a source of protein or healthy fat further blunts any glycemic response.
If you’re taking diabetes medications, keep in mind that chayote’s glucose-lowering effects could theoretically add to the effect of your medication. There’s no specific research on interactions between chayote and common diabetes drugs, and herbal or food-based supplements generally haven’t been tested for these interactions in a rigorous way. If you plan to consume chayote regularly in large amounts or in supplement form, mention it to your healthcare provider, particularly if you take medications where low blood sugar is a risk.
Chayote is widely available in Latin American grocery stores and increasingly in mainstream supermarkets. Choose firm fruits without soft spots or browning. They keep well in the refrigerator for up to two weeks, making them easy to have on hand as a regular part of your meals.