This is our premium Manuka product. The bees cannot make any higher activity level than the mid to high teens. Most grade manuka has been artificially heated to enhance its activity to unnatural levels often destroying the goodness that people want. We do not try to artificially "boost" activity levels preferring to supply only honey in the way the bees intended. All good honey may crystallise or set during storage. If this should occur please warm gently to return to its liquid state.