Raw and unfiltered honey is honey that has not been heated to high temperatures or pushed through fine filters, leaving its natural enzymes, pollen, and trace compounds intact. It’s the closest thing to honey straight from the hive that you can buy in a jar. The distinction matters because the processing steps used on most commercial honey, particularly pasteurization and fine filtration, remove or destroy many of the components that give honey its reputation as more than just a sweetener.
What “Raw” and “Unfiltered” Actually Mean
These two words describe different things, though they’re often used together. The USDA defines raw honey as “honey as it exists in the beehive or as obtained by extraction, but not filtered.” It may contain fine particles, pollen grains, air bubbles, bits of comb, and propolis (a resinous substance bees use to seal gaps in the hive).
Unfiltered honey, separately, is honey that hasn’t been passed through the fine mesh filters used in commercial processing. Standard honey strainers use mesh openings of 300 to 600 microns, which are wide enough to catch wax chunks and bee parts while letting pollen through. Commercial filtration, by contrast, pushes honey through openings as small as 20 microns, which strips out nearly all pollen along with other microscopic particles. When honey is labeled “unfiltered,” it means those fine particles remain.
There is no legally enforced FDA definition for “raw” on a honey label. The USDA provides a commercial description, but the term isn’t regulated the way “organic” is. This means two jars labeled “raw honey” on a store shelf could have been handled quite differently.
How Processing Changes Honey
Commercial honey is typically pasteurized by flash-heating it to 70 to 78°C (about 158 to 172°F) for a few seconds, then rapidly cooling it. This kills yeast cells that could cause fermentation, delays crystallization, and makes the honey look smoother and more uniform on the shelf. The trade-off is significant: heating beyond about 49°C begins to degrade honey’s natural enzymes and increases levels of a chemical called hydroxymethylfurfural (HMF), a marker of heat damage that rises with temperature and time.
Raw honey, by comparison, is only warmed to around 32 to 40°C (90 to 104°F) during extraction. This is roughly the temperature inside a beehive and doesn’t affect the honey’s composition. At this gentle warmth, honey flows well enough to be strained and poured into jars without damaging its natural compounds.
Enzymes in Raw Honey
Bees add enzymes to nectar as they process it into honey. Two of the most studied are diastase, which breaks down starches, and invertase, which splits complex sugars into simpler ones. Both are sensitive to heat. Research on honey quality shows that as temperature climbs above 49°C, diastase activity drops and HMF levels rise. These enzyme levels are actually used internationally as markers to judge whether honey has been overheated or stored too long.
Another key enzyme is glucose oxidase, which bees secrete from their hypopharyngeal glands into nectar during honey production. When raw honey is diluted (as it would be when applied to a wound or mixed into a drink), glucose oxidase activates and converts glucose into gluconic acid and hydrogen peroxide. This hydrogen peroxide production is the primary reason honey has antimicrobial properties. Pasteurization diminishes glucose oxidase activity, which weakens this effect.
Antioxidants and Plant Compounds
Raw honey contains a range of polyphenols, plant-based compounds with antioxidant properties. A study profiling honey from different U.S. states identified 18 phenolic compounds, including 13 flavonoids and 5 phenolic acids. Total phenolic content ranged from about 82 to 106 milligrams per 100 grams of honey, varying by geographic origin and the flowers bees visited. Washington state honey had the highest concentration in the study, while Colorado honey had the lowest.
These flavonoids do more than act as antioxidants. In the presence of trace amounts of copper and iron naturally found in honey, they can generate small amounts of hydrogen peroxide on their own, independent of enzyme activity. This creates a secondary antimicrobial mechanism that works alongside glucose oxidase. The interplay between the enzymes from bees and the plant compounds from nectar is part of what makes honey’s chemistry unique, and it’s a chemistry that high-heat processing disrupts.
Why Raw Honey Crystallizes
If your raw honey turns thick and grainy after a few weeks or months, that’s not a sign of spoilage. Crystallization is a natural process driven mainly by honey’s sugar composition. Honey is a supersaturated sugar solution, roughly 80% sugars and less than 20% water, so glucose molecules naturally want to come out of solution and form crystals.
How fast this happens depends on the ratio of fructose to glucose. Honey with a fructose-to-glucose ratio below 1.11 crystallizes quickly, sometimes within weeks. Honey with a ratio between 1.11 and 1.33 crystallizes at a moderate pace, and honey above 1.33 may stay liquid for months or never fully crystallize. Acacia honey, for instance, is naturally high in fructose and stays runny much longer than clover or wildflower varieties.
Unfiltered honey crystallizes faster than filtered honey because pollen grains and wax particles act as seed points for crystals to form around. Pasteurized, filtered honey stays liquid on the shelf longer precisely because those seed particles and the glucose’s natural tendency to crystallize have been disrupted. If a jar of honey never crystallizes, it’s a strong indication it has been heavily processed.
How to Spot Raw Honey
Raw, unfiltered honey has a few telltale visual traits. It typically looks cloudy or opaque rather than crystal clear, because pollen, tiny wax fragments, and air bubbles remain suspended in it. You might see small particles or even specks of honeycomb. The texture should be thick, and when you tilt the jar, it should move slowly. Honey that pours like syrup may have added water or been ultra-filtered.
Color varies widely depending on floral source, from pale gold (clover, acacia) to deep amber or nearly black (buckwheat, manuka). Color alone doesn’t indicate whether honey is raw. What does indicate processing is perfect visual clarity combined with a permanently liquid texture. That combination almost always means pasteurization and fine filtration.
One Important Safety Note
Raw honey, like all honey, can contain spores of the bacteria that cause botulism. For adults and children over one year old, this poses no risk because a mature digestive system prevents the spores from growing. For infants under 12 months, however, honey of any kind is unsafe. The CDC warns against feeding honey or honey-containing products, including honey pacifiers, to babies younger than one year. Several infant botulism cases in Texas were linked to honey pacifiers. This applies equally to raw, pasteurized, local, and imported honey.