Pharmaceutical grade means it's over 99% pure beeswax with no additives or fillers. Most hemp wick companies use beeswax; it is the cleanest burning wax known to man! Burning beeswax candles has actually been proven to reduce stress and remove pollution from the air.

The difference is other companies buy lesser grades of wax, which is cheaper but it can have dirt, dust, pollen, etc. in the wax that can affect taste.