Pasteurized honey is still a nutritious sweetener, but it does lose some beneficial compounds during heating. The main trade-off is a reduction in enzyme activity and potentially some antioxidant content, while the sugar profile, calories, and most antibacterial properties remain largely intact. Whether that trade-off matters depends on why you’re eating honey in the first place.
Why Honey Gets Pasteurized
Honey pasteurization isn’t about food safety the way milk pasteurization is. Honey is naturally inhospitable to most bacteria thanks to its low moisture, low pH, and high sugar concentration. The real reasons are commercial: heating honey to around 78°C (172°F) for about six minutes kills the naturally occurring yeasts that can cause fermentation, and it dissolves the glucose crystals that make honey turn cloudy and grainy on store shelves. The result is a smooth, pourable product with a longer shelf life, which is what most consumers expect when they grab a bottle at the grocery store.
What Pasteurization Changes
The most measurable loss is enzyme activity. Honey naturally contains enzymes like diastase and glucose oxidase, both of which are sensitive to heat. At pasteurization temperatures (78°C), diastase activity drops by about 15.5% immediately, and it continues declining during storage afterward. Glucose oxidase is the enzyme responsible for producing hydrogen peroxide when honey is diluted, which is one of the mechanisms behind honey’s wound-healing reputation. Heat damages this enzyme too, which may reduce that particular benefit.
Honey also contains small amounts of antioxidants, including flavonoids and phenolic compounds. These are more heat-stable than enzymes, but prolonged or repeated heating can still degrade them over time. The vitamins in honey exist in trace amounts to begin with (tiny quantities of B vitamins and vitamin C), so any losses from pasteurization are nutritionally negligible.
What doesn’t change much: the sugar composition, the calorie content, and the mineral profile. Honey is roughly 80% sugar by weight, split mostly between fructose and glucose. Pasteurization doesn’t alter that ratio. The average glycemic index of honey sits around 58, compared to 60 for table sugar. That modest advantage holds regardless of whether the honey has been heated.
Antibacterial Properties Still Work
One of the more surprising findings is that pasteurized honey retains significant antibacterial activity. Lab testing shows that processed honey still inhibits a wide range of bacteria, including common pathogens like E. coli, Staphylococcus aureus, and Salmonella typhi. In some cases, the zones of inhibition (a measure of how effectively honey stops bacterial growth) were quite large, suggesting the antibacterial effect isn’t solely dependent on the heat-sensitive enzymes.
This makes sense when you consider that honey fights bacteria through multiple mechanisms: its high sugar concentration pulls water out of bacterial cells, its acidity creates a hostile environment, and it contains an antimicrobial peptide called bee defensin-1. These properties survive pasteurization. So if you’re using honey as a sore throat remedy or a general antimicrobial food, pasteurized versions still offer real benefits.
How It Compares to Raw Honey
Raw honey has the edge in enzyme activity and likely in antioxidant content, particularly if it hasn’t been filtered heavily. The intact glucose oxidase means raw honey produces more hydrogen peroxide when diluted, which matters most for topical wound care. Raw honey also tends to contain trace amounts of pollen and propolis, which some people seek out for allergy-related reasons (though the evidence for that benefit is limited).
For everyday use as a sweetener in tea, oatmeal, or baking, the differences narrow considerably. You’re getting essentially the same calories, the same sugars, and the same glycemic response. Both raw and pasteurized honey perform better than table sugar in studies comparing glycemic index and insulin response, with honey consistently producing lower blood sugar spikes in both healthy individuals and people with diabetes.
If you’re buying honey primarily for its taste and as a marginally better alternative to refined sugar, pasteurized honey serves that purpose well. If you want the full spectrum of enzymes and bioactive compounds, raw honey is the better choice.
One Thing Pasteurization Doesn’t Fix
A common misconception is that pasteurized honey is safe for infants. It is not. The concern with giving honey to babies under one year old is Clostridium botulinum spores, which can germinate in an infant’s immature digestive system and produce dangerous toxins. These spores are extremely heat-resistant and survive standard pasteurization temperatures. Neither raw nor pasteurized honey should be given to children under 12 months.
The Bottom Line on Nutrition
Pasteurized honey is still a whole food with genuine nutritional properties. It retains its sugar profile, its minerals, its antibacterial activity, and its lower glycemic index compared to table sugar. What it loses, primarily enzyme activity, matters most for specific therapeutic uses like wound care rather than for general dietary purposes. It’s still honey. It’s just honey that’s been heated long enough to stay liquid and clear on your shelf for months, at the cost of some of the more delicate biological compounds that raw honey preserves.