Sales of creatine have seen a significant increase, with the subcategory up 90% over the last 12 months. This growth is unusual for a commodity ingredient that has been widely available since the early 1990s. According to an analysis of Amazon data, creatine sales have reached $57.5 million per month, totaling $721 million over the past year.

The growth is driven in part by women, who are fueling creatine's biggest year in three decades. Further details on this trend are available from the source, which analyzed data from the US Amazon marketplace.