Wheatgrass powder contains chlorophyll which is very similar to hemoglobin, the substance in human blood that helps carry oxygen and nutrients throughout the body. The body can easily transform chlorophyll into hemoglobin - thus increasing the body's red blood cell count and its capacity to deliver oxygen and other nutrients to all our cells. Chlorophyll has also been shown to help maintain healthy blood sugar levels, help normalize blood pressure, promote a higher metabolism and weight loss, help alkalize and energize the body, and help protect against harmful carcinogens.
Wheatgrass is a very powerful cleanser and detoxifier. Its high amounts of B-complex vitamins, vitamin C, vitamin E, carotene, and saponin are very effective at neutralizing free radicals and cleansing the entire body - specifically the blood, organs like the liver, lymphatic system, and gastrointestinal tract.
Wheatgrass reportedly has about 100 different nutritional elements and is considered a "complete food" for this reason. It's extremely high in 19 different amino acids (which are the building blocks of protein), contains several essential live enzymes, and offers over 90 known minerals including potassium, calcium, magnesium, and sodium (the most alkalizing minerals).
PLEASE NOTE: Due to its very strong detoxifying abilities, make sure to use wheatgrass powder in very small quantities when you first start consuming it. Many people that do not actively cleanse their body's on a regular basis will become very nauseous and stimulate a healing crisis that could make you very sick. Start with just 1 tsp a day for the first few days, then slowly work your way up to higher amounts.