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Nutrition Fact 1: Microgreens Provide More Nutrition Than Mature LeavesA 2010 study published in the Journal of American Society for Horticultural Science reported that young lettuce seedlings, harvested 7 days after germination, had the highest antioxidant capacity as well as the highest concentrations of health-promoting phenolic compounds, compared with their more mature conterparts.
Nutrition Fact 2: Vitamin C is Abundant in MicrogreensYoung edible seedlings are a superb source of vitamin C, an antioxidant that helps protect your body from the harmful effects of free radicals. The 2012 study on microgreens reported that even the microgreen sample that had the lowest levels of vitamin C contained a whopping 20 milligrams of vitamin C per 100 grams – that's almost twice the amount of vitamin C found in tomatoes! Red cabbage microgreens had the highest levels of vitamin C among the tested varieties, with a 100-gram portion providing 147 milligrams – or 245% of the daily value – of this vital nutrient. For comparison, an equal-sized serving of mature raw red cabbage contains 57 milligrams of vitamin C according to data provided by the U.S. Department of Agriculture.
Nutrition Fact 3: Many Microgreens Are Loaded With Beta-CaroteneCarotenoids, such as beta-carotene, are thought to reduce the risk of disease, particularly certain types of cancer and eye disease. Carrots are famous for being rich in beta-carotene, but turns out that many microgreens are also a good source of this important nutrient. In fact, some microgreens appear to contain even more beta-carotene than carrots: 12 milligrams per 100 grams compared with 8 milligrams in boiled carrots, according to the 2012 study. The researchers who analyzed the beta-carotene content of microgreens found that these super-nutritious greens also provide other carotenoids such as lutein and zeaxanthin.
Nutrition Fact 4: Microgreens Are a Good Source of Vitamin EBack in 1967, a team of scientists from Yale University showed that young pea seedlings grown in light contain significant levels of tocopherol (vitamin E). Similarly, the researchers responsible for the 2012 microgreen study found substantial amounts of tocopherols in the tested greens. The amount of alpha-tocopherol and gamma-tocopherol combined ranged from 7.9 to 126.8 milligrams per 100 grams, with green daikon radish microgreens scoring the highest value in this analysis. For adults, the recommended daily allowance for vitamin E is 15 milligrams of alpha-tocopherol, meaning that eating just a small amount of daikon radish microgreens would cover your daily requirement for this important antioxidant vitamin.
Nutrition Fact 5: Greens – Even if Small in Size – Contain Vitamin KThe Yale study on pea microgreens – or young pea seedlings as they were called back then – also discovered that the seedlings started to produce large amounts of vitamin K when they were exposed to light. But that's hardly big news. Vitamin K functions as an electron acceptor when chlorophyll – abundant in all green plants including microgreens – absorbs sunlight to produce carbohydrates and oxygen during photosynthesis. Vitamin K also offers health benefits for humans by promoting normal blood clotting and preventing excessive bruising. Vitamin K also plays an important role in maintaining strong and healthy bones.
The 2012 microgreen study analyzed the levels of phylloquinone (the type of vitamin K produced by plants) in different micro-sized greens, and found the highest levels of vitamin K in amaranth microgreens (Red Garnet variety). The researchers observed marked differences in vitamin K concentration between different microgreens, with the values ranging from 0.6 to 4.1 micrograms per gram.
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How to Reap the Health Benefits of MicrogreensTo reap the health benefits of microgreens, eat them immediately after harvest. Microgreens, like most other superfoods that are consumed fresh, begin to lose their nutritional value rapidly after harvest. Consider growing your own microgreens at home as this will allow you to decide exactly when you harvest your crop.