Citrus honey has the lowest glycemic index of any variety tested in clinical research, scoring about 45. That puts it firmly in the low-GI category (55 and below), well under the average GI of 55 for honey in general and far below table sugar’s GI of 68. But the range across honey types is surprisingly wide, and the floral source matters more than most people realize.
The Lowest-GI Honeys by the Numbers
A study testing monofloral honeys (each made predominantly from one flower source) found a clear ranking. Citrus honey came in at a GI of 44.9, followed by thyme honey at 52.6, lime honey at 55.3, chestnut honey at 55.5, and pine honey at 58.8. Only citrus and thyme qualified as truly low-GI by standard definitions. Lime and chestnut sit right at the border between low and moderate.
For context, the glycemic index scale works like this:
- Low GI: 1 to 55
- Medium GI: 56 to 69
- High GI: 70 and higher
Many of the most common supermarket honeys land in the medium-to-high range. Clover honey scores around 69, buckwheat around 73, and tupelo around 74. These are all closer to or above the threshold for high-GI foods, despite tupelo’s longstanding reputation as a “diabetic-friendly” option.
Why Tupelo’s Reputation Is Misleading
Tupelo honey is often marketed as a low-GI sweetener because it has an unusually high fructose-to-glucose ratio of about 1.54, compared to 1.09 for clover. The logic sounds intuitive: fructose doesn’t spike blood sugar as sharply as glucose, so more fructose should mean a lower glycemic response. In practice, that’s not what happens.
A study testing clover, buckwheat, cotton, and tupelo honeys in human volunteers found no statistically significant differences in glycemic index between any of them. Tupelo scored 74.1, essentially the same as the others. The researchers concluded that small differences in the fructose-to-glucose ratio don’t substantially change how your blood sugar responds. If you’ve been buying tupelo specifically for blood sugar control, you’re likely not getting the benefit you expected.
What Makes Some Honeys Lower-GI
Honey is roughly 80% sugar by weight, and its two main sugars are fructose and glucose. Fructose gets processed primarily by your liver rather than flooding your bloodstream the way glucose does. In theory, honeys with more fructose relative to glucose should produce a gentler blood sugar curve. The fructose content across honey varieties ranges from 21% to 43%, and the fructose-to-glucose ratio can vary from 0.4 to 1.6 or higher depending on the flower source.
But ratio alone doesn’t tell the whole story. The Turkish honey study that identified citrus and thyme as low-GI also found something interesting about chestnut honey: even though its GI was moderate at 55.5, it produced significantly lower insulin levels after consumption. That suggests the body’s full metabolic response to different honeys involves more than just the speed of sugar absorption. Other compounds in honey, including organic acids, minerals, and trace enzymes, likely play a role that researchers are still working to quantify.
Manuka Honey Falls in the Middle
Manuka honey, prized for its antibacterial properties, scores in the moderate GI range of 54 to 59. A study testing five different Manuka samples from across New Zealand’s North Island found they all clustered in that band, regardless of their methylglyoxal concentration (the compound responsible for Manuka’s therapeutic reputation). So a higher-grade Manuka doesn’t mean a lower blood sugar impact. If you’re using Manuka for its other health benefits, it’s worth knowing it’s a middle-of-the-road choice glycemically.
How Honey Compares to Table Sugar
The average GI for honey is about 55, compared to 68 for table sugar (sucrose). That’s a meaningful difference, but it comes with a caveat: the average masks huge variation. A citrus honey at 45 is dramatically better than sugar for blood sugar control. A buckwheat honey at 73 is actually worse. The type of honey you choose matters as much as the decision to use honey instead of sugar.
Glycemic index also only tells you about the speed of blood sugar rise, not the total impact per serving. A tablespoon of honey contains about 17 grams of carbohydrate. Even with a low-GI honey, eating several tablespoons will produce a significant blood sugar load simply because of the quantity of sugar involved. The GI advantage of citrus or thyme honey is most meaningful when you’re using modest amounts.
Choosing the Right Honey
If your goal is minimizing blood sugar impact, citrus honey is the best option currently supported by clinical data, with a GI of about 45. Thyme honey at 53 is a close second. Both are monofloral honeys, meaning they come from bees that foraged predominantly on one type of flower. You’ll typically find them at specialty food stores or online rather than in a standard grocery aisle.
Look for labels that specify the floral source. Generic “wildflower” or “pure honey” labels tell you nothing about the sugar composition, and these blends tend to score in the moderate-to-high GI range. Monofloral honeys cost more, but if glycemic impact is your concern, the specificity is worth it.
One practical note: the GI values in research come from standardized portions tested under controlled conditions. Your individual response will vary based on what else you’re eating at the same time. Pairing honey with protein, fat, or fiber (spreading it on whole-grain toast with nut butter, for example) slows digestion and blunts the blood sugar spike regardless of which variety you choose.