What is Maca Powder? BULK POWDERS™ Maca Powder is a 100% pure source of this gluten free, low glycemic index (GI) carbohydrate. In addition, it contains an excellent 12g protein per 100g, including the full essential amino acid spectrum – making it a complete protein source. Maca Powder also impresses with its high levels of naturally occurring vitamins & minerals, which is why you will often see it referred to as a 'superfood'. The carbohydrate content of Maca Powder is digested