Honey's Sweet Spot: The Impact of Temperature on Quality
- Frank Jeanplong
- Aug 21, 2024
- 2 min read
Honey, a natural treasure cherished for its sweetness and potential health benefits, is a complex substance influenced by various factors, including its botanical origin. Mānuka honey, renowned for its unique antibacterial, antioxidant, and anti-inflammatory properties, is particularly prized by consumers. However, like all honey, Mānuka honey requires careful storage to preserve its quality and potency.
A recent study delved into the effects of different storage temperatures on the chemical composition and antimicrobial properties of honey, including linden, buckwheat, and sunflower varieties. While the study didn't specifically focus on Mānuka honey, the findings offer valuable insights for all honey producers, including those specializing in Mānuka.
Key Findings from the Study
The research highlighted the critical importance of temperature control in preserving honey's quality. Key findings include:
Temperature's impact on HMF (Hydroxymethylfurfural, an organic compound derived from dehydration of fructose and glucose): Higher storage temperatures accelerate the formation of HMF, a compound linked to honey degradation. HMF is frequently used as a freshness marker, being low at harvest and increasing with heat treatment and during storage.
Enzyme preservation: Honey's enzymes such as glucose oxidase and catalase, crucial for its antibacterial properties, are sensitive to temperature fluctuations. The same is true for diastase, another enzyme the level of which is used as a freshness marker in certain countries.
Optimal storage conditions: Storing honey between 0-5°C helps maintain its quality, flavour, and antimicrobial properties for the long term. This observation confirms earlier findings on Mānuka honey that showed very little change in the concentration of MGO (Methylglyoxal, a grading marker) and DHA (Dihydroxyacetone, a precursor of MGO) at 4°C during long-term storage.
A Focus on Mānuka Honey Producers
Producers must prioritize optimal storage conditions given the high value and demand for Mānuka honey. They need to set a temperature for the maturation of Mānuka honey to a certain target grade (e.g. MGO=263mg/kg) using the manuka forecast and a different temperature (e.g. 0-4°C) to preserve this grade until it is sold.
The study's findings underscore the importance of temperature control in preserving Mānuka honey's unique properties, including its high levels of methylglyoxal (MGO), a key marker of Mānuka honey's potency. By adhering to recommended storage practices, Mānuka honey producers can ensure that their product reaches consumers with maximum potency, aroma, and flavour.
Key Takeaway: For Mānuka honey producers, maintaining a consistent storage temperature between 0°C and 5°C is crucial for preserving the honey's unique properties in the long term and delivering a superior product to consumers.
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