聚谷氨酸（聚-γ-谷氨酸，英文poly- γ –glutamic acid，简称PGA）又称纳豆胶、多聚谷氨酸，在“纳豆”发酵中首次发现。纳豆是一种日本人经常食用的传统黄豆发酵食品。经过发酵作用以后的纳豆含有比黄豆本身更丰富的维他命（B2、B6、B12、E、K2）以及更易消化的蛋白质，此外纳豆中还含有多种消化酵素以及对身体健康有帮助的特殊多糖（Levan）、血栓分解酵素（Nattokinase）以及γ–聚谷氨酸(γ–PGA)等，对于促进身体健康有极佳的效果，近年来相当流行食用纳豆来增进身体的健康。 Poly - γ - glutamic acid (PGA), also known as natto gum or polyglutamic acid, was first discovered during the fermentation of natto. Natto is a traditional fermented soybean food commonly consumed by Japanese people. After fermentation, natto contains more abundant vitamins (B2, B6, B12, E, K2) and more easily digestible proteins than soybeans themselves. In addition, natto also contains various digestive enzymes, as well as special polysaccharides (Levan), thrombolytic enzymes (Nattokinase), and gamma polyglutamic acid (gamma PGA) that are helpful for physical health. It has excellent effects on promoting physical health and has become popular for consumption in recent years to enhance overall health.
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Polyglutamic Acid（conventional)
CAS number：unknown molecular formula：
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| Chinese alias | γ-聚谷氨酸 | ||
| English alias | γ-Polyglutamic Acid (γ-PGA) | ||
| CAS number | unknown | molecular formula | |
| molecular weight | - | Exact mass | ≥90% |
| PSA | - | logp | - |
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