How to Choose Quality Honey: Raw vs Processed, Manuka, and What to Avoid

What Makes Honey Therapeutic — And What Processing Destroys. Raw, unprocessed honey is a complex biological product containing: hydrogen peroxide (produced by the enzyme glucose oxidase); methylglyoxal (MGO) — particularly high in Manuka honey; bee defensin-1 (royalisin) — an antimicrobial peptide; polyphenols and flavonoids (pinocembrin, kaempferol, quercetin, luteolin) — with antioxidant and anti-inflammatory activity; organic acids (gluconic acid) that maintain the low pH (3.2–4.5) that inhibits bacterial growth; and pollen — which carries geographic and botanical origin information and contributes to the honey's flavour and nutritional profile. Commercial processing destroys most of these compounds. Ultra-filtration — forcing honey through extremely fine filters under high pressure — removes pollen (making origin verification impossible), wax, and other particulates. Pasteurisation — heating to 70°C or above — destroys glucose oxidase (eliminating hydrogen peroxide production), degrades polyphenols, and kills beneficial yeasts and enzymes. The result is a clear, smooth, shelf-stable product that looks like honey and tastes like honey but has lost most of its therapeutic properties. A 2011 Food Safety News investigation found that 76% of honey sold in US grocery stores contained no pollen — meaning it had been ultra-filtered and could not be verified as genuine honey under international standards. The FDA and the European Honey Directive both define honey as a product that must contain pollen to be classified as honey — ultra-filtered honey technically fails this definition.

Raw Honey: What It Is and What to Look For. Raw honey is honey that has not been heated above the temperature of the hive (approximately 35°C / 95°F) and has not been ultra-filtered. It retains all of its natural enzymes, pollen, propolis, and bioactive compounds. Characteristics of genuine raw honey: appearance — raw honey is typically opaque or cloudy due to pollen and wax particles; it may be partially or fully crystallised (crystallisation is a natural process that does not indicate spoilage — it is actually a sign of genuine honey with high glucose content); texture — thicker and more viscous than processed honey; flavour — more complex, with floral, earthy, or fruity notes depending on the botanical source; label — should state 'raw', 'unfiltered', or 'unpasteurised'; should ideally include the botanical source (monofloral vs polyfloral) and geographic origin. Crystallisation is one of the most reliable indicators of genuine raw honey — ultra-processed honey has been heated and filtered to prevent crystallisation for aesthetic reasons. If your honey never crystallises, it has almost certainly been processed. To reliquefy crystallised honey: place the jar in warm water (below 40°C) — never microwave, as this destroys enzymes and polyphenols.

Manuka Honey: The Evidence, the Ratings, and the Fraud. Manuka honey — produced from the nectar of the Leptospermum scoparium (manuka) bush in New Zealand and parts of Australia — has the strongest clinical evidence of any honey variety for antimicrobial activity. Its primary active compound is methylglyoxal (MGO), which is present at concentrations 100 times higher than in conventional honey. Unlike hydrogen peroxide (which is destroyed by heat and light), MGO is stable and retains its antimicrobial activity even after processing. Clinical evidence for Manuka honey: wound healing — multiple RCTs and systematic reviews support its use for chronic wounds, burns, and surgical wounds; it is licensed as a medical device in the EU and US for wound care; oral health — a 2010 RCT found Manuka honey reduced plaque and gingivitis more effectively than a sugar-free chewing gum control; H. pylori — in vitro studies show MGO inhibits H. pylori; clinical evidence is limited but promising; cough — as with all honeys, Manuka is effective for cough suppression. Understanding Manuka ratings: UMF (Unique Manuka Factor) — the most rigorous certification; tests for MGO, leptosperin (a Manuka-specific marker), and DHA (dihydroxyacetone); UMF 10+ (MGO 263+) is the minimum therapeutic grade; UMF 15+ (MGO 514+) for wound care; UMF 20+ (MGO 829+) for clinical applications. MGO rating — measures methylglyoxal content directly; MGO 100+ is entry-level; MGO 400+ is therapeutic. The Manuka fraud problem: New Zealand produces approximately 1,700 tonnes of genuine Manuka honey per year — but 10,000 tonnes are sold globally as 'Manuka honey'. Look for the UMF certification seal (issued by the UMF Honey Association of New Zealand) as the most reliable quality guarantee.

Other Therapeutic Honey Varieties Worth Knowing. Buckwheat honey — the highest polyphenol content of any common honey variety; dark amber to black in colour; strong, robust flavour; the best-evidenced honey for cough suppression (outperformed dextromethorphan in a 2007 RCT); rich in antioxidants including chlorogenic acid and rutin; widely available in the US and Eastern Europe. Sidr honey (Yemen/Saudi Arabia) — produced from the Ziziphus spina-christi (sidr/lote) tree; traditionally used in Islamic medicine; high in flavonoids and antimicrobial compounds; limited clinical research but strong traditional use and high polyphenol content. Tualang honey (Malaysia) — produced by wild Apis dorsata bees in rainforest trees; high in phenolic acids and flavonoids; emerging research on wound healing and antioxidant activity. Acacia honey — produced from black locust (Robinia pseudoacacia) flowers; very high fructose content (low glycaemic index); mild flavour; lower polyphenol content than buckwheat or Manuka; good for people who prefer a mild honey but not the best therapeutic choice. Thyme honey (Greece) — produced from wild thyme; high in thymol and carvacrol (antimicrobial terpenes); strong flavour; good antimicrobial activity. For general health use, buckwheat honey offers the best combination of evidence, availability, and value. For wound care and antimicrobial applications, UMF-certified Manuka honey is the gold standard.

Adulteration, Fraud, and How to Spot Genuine Honey. Honey adulteration — adding cheap syrups (high-fructose corn syrup, rice syrup, beet sugar syrup) to bulk out the product — is one of the most common food frauds globally. A 2018 European Commission investigation found that 46% of honey samples tested from non-EU countries were adulterated or suspicious. Detection methods: pollen analysis — genuine honey contains pollen specific to its botanical and geographic origin; ultra-filtered honey contains no pollen; C4 sugar test — detects the addition of corn or cane sugar syrups (which have a different carbon isotope ratio than honey); NMR (nuclear magnetic resonance) spectroscopy — the most sophisticated test, can detect adulteration with rice syrup and other syrups that pass the C4 test. Signs of adulteration you can observe: extremely low price (genuine raw honey costs significantly more than ultra-processed honey; Manuka UMF 15+ should cost $30–60 per 250g); perfect clarity and no crystallisation (genuine raw honey crystallises); no pollen visible under a magnifying glass; very mild, undifferentiated flavour (adulterated honey often tastes of sugar syrup rather than flowers). Buying from reputable sources: local beekeepers and farmers' markets are the most reliable source of genuine raw honey; look for honey with a named geographic origin and botanical source; for Manuka, look for the UMF certification seal; for general raw honey, look for 'raw', 'unfiltered', and 'unpasteurised' on the label.