Quinoa Grains |
Protein and Amino Acid Contents of Quinoa
Quinoa has a protein content of 13.8% (dry weight). Quinoa is one of the very few plant-based sources of quality proteins. The human body breaks down the exogenous proteins to their amino acid components which are then used to build human proteins. Availability of quality proteins (availability of the essential amino acids) from dietary sources is necessary for the body to complete the synthesis of proteins and maintain functional integrity.Quinoa has all of the essential amino acids, and it has them in proper and adequate amounts and proportions for utilization by the human body. The essential amino acid composition of quinoa is shown below (1).
Amino Acid: g/100 g Protein
- Phenylalanine: 4.6
- Lysine: 5.1
- Valine : 4.8
- Threonine: 3.7
- Tryptophan: 1.2
- Isoleucine: 4.0
- Methionine: 2.2
- Leucine: 6.8
Essential Trace Minerals in the Quinoa
Minerals are very important for maintaining the functional integrity of the body. In the absence of minerals, life on earth would be impossible. We can generally obtain the primary minerals (sodium, potassium, calcium, phosphate, etc) from our diets, but the trace minerals are not readily available in our diets compared to the primary minerals.Some foods, such as the mushrooms , are replete with trace minerals. Most plant sources do not have adequate amounts of trace minerals. Among the plant based-sources of nutrients, quinoa stands out as one of the foods with significant amounts of trace minerals.
Magnesium, phosphate and trace minerals in significant amount in the quinoa grain are shown below (2). The values are shown as milligrams (mg) of the mineral in 42.5 grams (.25 cup, one serving) of quinoa. The percentage of The daily recommended value of each mineral as a percentage in one serving of quinoa (% DV) is also shown.
Mineral Concentration per Serving of Quinoa: mg/42.5 g Quinoa, % DV
Manganese: 0.96, 48.0Magnesium: 89.25, 22.5
Iron: 93.0, 21.8
Copper: 0.35, 17.5
Phosphorus: 174.5, 17.4
Zinc: 2.0, 13.0
Selenium: 0.0052 , 7.0
Vitamin Contents of Quinoa
Both the leaves and seeds of quinoa are edible. Quinoa belongs to the same family as the spinach, so the vitamin content of the leaves would show some resemblance to that of the spinach. Our attention, however, is focused mainly on the grain.Vitamins are found in significant amounts in the quinoa grain, however, the types of vitamin are not as broad as that of the typical leafy vegetable. Presented below are vitamins found in significant amounts in the quinoa grain [3].
Vitamin Concentrtation per Serving of Quinoa: Amount/42.5 g Quinoa
- Vitamin E Alpha Equivalent: 12.07 mg
- Niacin - B3: 1.25 mg
- Thiamin – B1: 0.08 mg
- Riboflavin -B2: 0.17 mg
- Niacin Equivalent: 2.27 mg
- Vitamin – B6: 0.09 mg
- Vitamin E IU: 3.08 mg
- Vitamin E mg: 2.07 mg
- Folate: 20.83 mg
- Pantothenic Acid: 0,44 mg
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