Agave has a lower glycemic index than honey, which means it causes a smaller immediate spike in blood sugar. But that doesn’t make it a better choice for people with diabetes. Agave gets its low glycemic index from being extremely high in fructose, and fructose carries its own metabolic risks that matter just as much as blood sugar spikes.
Why Agave Has a Lower Glycemic Index
Agave syrup scores between 10 and 19 on the glycemic index, while most honeys fall between 45 and 64 depending on the variety. That’s a significant gap, and it’s the number most people latch onto when comparing the two. But the reason agave scores so low is important: it’s roughly 90% fructose. Fructose doesn’t trigger the same insulin response as glucose, so it barely registers on the glycemic index. That sounds like a win for blood sugar management, but fructose takes a very different path through your body, one that creates problems of its own.
The Fructose Problem With Agave
Unlike glucose, which your cells throughout your body can use for energy, fructose is processed almost entirely by the liver. When fructose arrives in large amounts, the liver converts much of it into fat. Research published in the Journal of Nutrition found that even moderate consumption of fructose-containing liquids, including agave, led to higher triglyceride levels compared to water. Elevated triglycerides are a risk factor for heart disease, and people with diabetes already face higher cardiovascular risk.
The same study found that agave, high-fructose corn syrup, and pure fructose all raised blood triglycerides, while a non-caloric sweetener like stevia did not. Notably, there were no differences in body weight between groups, meaning these lipid changes happened independent of weight gain. The concern isn’t that agave will make you gain weight overnight. It’s that the fructose load quietly shifts your blood lipid profile in an unfavorable direction.
Rising fructose consumption across the population has been linked to increases in fatty liver disease, metabolic syndrome, and insulin resistance. For someone already managing diabetes, adding a concentrated fructose source works against the broader metabolic goals of treatment, even if the post-meal blood sugar number looks acceptable.
How Honey Affects Blood Sugar
Honey does raise blood sugar more quickly than agave. Its sugar composition is closer to a 50/50 split between fructose and glucose, meaning it hits your bloodstream faster and triggers an insulin response. For someone monitoring glucose after meals, that spike is real and needs to be accounted for.
However, honey comes with compounds that may partially offset this effect. It contains over 180 different compounds, including antioxidants called flavonoids and phenolic acids. These molecules help neutralize free radicals, which are involved in the inflammation and cell damage that accelerate diabetic complications. Honey also provides small amounts of potassium, calcium, magnesium, iron, zinc, and B vitamins. Agave contains some minerals and polyphenols as well, but honey’s antioxidant profile is more extensively studied and more concentrated in raw, minimally processed varieties.
One small clinical study found that people with type 2 diabetes who consumed 5 to 25 grams of honey daily (roughly 1 to 1.5 teaspoons) for four months saw a reduction in their HbA1c, the marker that reflects average blood sugar over two to three months. Those who consumed larger amounts, though, saw their HbA1c rise. The dose clearly matters.
Calories and Carbs Are Nearly Identical
Neither sweetener gives you a caloric advantage. One tablespoon of agave contains 64 calories, 16 grams of carbs, and 14 grams of sugar. One tablespoon of honey also contains 64 calories, with 17 grams of carbs and 16 grams of sugar. The difference is negligible. If you’re counting carbs to manage your diabetes, both sweeteners cost you roughly the same carbohydrate budget per serving.
What the American Diabetes Association Says
The ADA’s 2024 Standards of Care groups honey and agave syrup together as “nutritive sweeteners,” meaning sweeteners that contain calories and sugar. The guidelines don’t recommend one over the other. Instead, they suggest that people with diabetes who are used to consuming sugar-sweetened products may consider non-nutritive sweeteners (those with few or no calories) as substitutes, when used in moderation. The broader recommendation is to replace sugar-sweetened beverages with water or low-calorie drinks, and to minimize added sugars that crowd out more nutrient-dense foods.
In other words, the official guidance treats both agave and honey as added sugars to limit, not as therapeutic tools.
Which One to Choose in Practice
If your primary concern is the immediate blood sugar spike after a meal, agave will cause less of one. But if you’re managing diabetes as a whole metabolic condition, which includes cardiovascular risk, liver health, and long-term insulin sensitivity, agave’s heavy fructose load is a meaningful downside. Honey in small amounts (a teaspoon or so) provides some antioxidant benefit and has at least preliminary evidence of not worsening, and possibly improving, blood sugar control at low doses.
The most practical approach is to treat both as occasional additions rather than staples. A teaspoon of either one in your tea or on yogurt adds about 5 to 6 grams of sugar, a manageable amount for most people with diabetes when factored into their daily carbohydrate plan. The trouble starts when either sweetener gets used liberally, as a “healthy” substitute poured freely over food. Neither agave nor honey earns that level of trust.
If you’re looking for a sweetener that has minimal impact on both blood sugar and metabolic health, non-nutritive options like stevia or monk fruit extract are more aligned with that goal. They add sweetness without the glucose spike of honey or the fructose load of agave.