Indeed, while an extensive body of clinical studies forms the basis upon which pharmacopoeias worldwide have issued recommendations for ashwagandha root usage, consumption of the plant’s leaf material is not recommended by any such organisations. The Government of India goes further, warning that ingredient manufacturers, and food/dietary supplement brands “should refrain from using ashwagandha leaves in their products” on account of there being “no substantial evidence or literature available” to endorse their efficacy for consumption.

Best-selling root extract KSM-66 has long guaranteed brands the efficacy and root purity that consumers are increasingly seeking out – even as concerns grow surrounding the tendency for less scrupulous ashwagandha extract manufacturers to adulterate their products with leaves (a cheaper material, typically used for compost).