Various research indicates dietary nitrate supplementation is linked up with enhanced muscle efficiency, fatigue resistance, and performance. The most popular source of dietary nitrates is beetroot. The recent study identified an alternative source rich with dietary nitrates − amaranth (Amaranthus hypochondriacus).
According to The Whole Grains Council amaranth is a complete protein, containing all nine essential amino acids. Some studies place it as one of the most nutritious plant-based proteins. Each whole-grain oﬀers a diﬀerent mix of nutrients. Whole grain amaranth provides a good source (greater than or equal to 10% of the recommended daily value) of protein, ﬁber, iron, selenium, and the B vitamin, pyridoxine (B6). Amaranth is also an excellent source (greater than or equal to 20% of the recommended daily value) of magnesium and phosphorus and contains at least half of the recommended daily value of manganese, which helps metabolize protein and other macronutrients.
The study, published by the Journal of the International Society of Sports Nutrition concludes that 6 days supplementation with dietary nitrate from amaranth may improve aerobic capacity during cycling exercise in young physically active male persons. The authors conclude it may be applied as the nutritional supplement during the last week of preparation for competing in endurance events.