By Rosie Taylor for the Daily Mail
Published: 00:49 GMT, 2 January 2019 | Updated: 17:31 GMT, 2 January 2019
Expensive manuka honey may have lost its healing powers before customers even get it home, a scientist has warned.
The honey, known as ‘liquid gold’ because it costs up to £100 per jar, is sought after for antibacterial properties that come from its naturally-occurring bug-fighting chemical.
But this chemical can be destroyed by prolonged exposure to heat – such as during shipping or even sitting in shop windows – according to Professor Merilyn Manley-Harris.
The honey chemist, of Waikato University, New Zealand, warned some manuka honey sold in