The latest addition to your tea? Grapefruit! American scientist who claimed salt was the secret to the perfect cuppa now says adding citrus can prolong the caffeine rush

10 months ago 57

Michelle Francl, a professor of chemistry at Bryn Mawr College in Pennsylvania, has already sent British tempers rising by suggesting the perfect cup of tea contains salt.

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The latest addition to your tea? Grapefruit! American scientist who claimed salt was the secret to the perfect cuppa now says adding citrus can prolong the caffeine rush

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