I heard that taking manuka honey helps with the immune systems so going to get this one MARKS & SPENCER OWN LABEL Marks & Spencer, £14.75 (340g) WHAT THE TEST FOUND: M&S has come up trumps. A score of 347.9mg/kg of MGO was the highest in our investigation. Leptosperin levels were the second highest, at 446mg/kg, showing it had been gathered by bees feasting exclusively on manuka nectar. WOULD IT QUALIFY FOR A UMF KITEMARK? Yes.a
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