Barley grass juice powder starts as young barley leaves, juiced and then dehydrated into a fine powder. You get a concentrated mix of chlorophyll, vitamins A, C, and K, minerals, and antioxidants. The grass is cut well before the plant makes grain, so this is a leafy green supplement, not a cereal product.
People reach for it as a daily green drink, hoping to support energy and digestion with its dense nutrition and fiber. Some drinkers believe it helps shift the body toward a more alkaline state and delivers a quick hit of phytonutrients.
Mix 1 teaspoon to 1 tablespoon into water, juice, or a smoothie. The powder contains vitamin K, which can clash with blood-thinning drugs like warfarin. Oxalates are present too, so anyone with a history of kidney stones should keep intake moderate. Use caution if you have grass allergies or pollen sensitivities.