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Why does the heart of lotus seeds feel bitter when soaked in cold water?

The lotus seed heart is the green germ in the center of the lotus seed. The taste itself is very bitter

The main ingredients of the lotus seed heart: contain lynsinine, isoliensinine, methylnexinine, lotus leaf Alkali, pro-nuciferine, bispermide, methyl ioquatine, desmethyl higenamine. It also contains flavonoids such as luteolin, hyperoside, and rutin. Among them, nuciferine, anthocyanin, and methyl violacein are bitter, so the lotus seed heart is bitter, and the mature lotus seed heart is bitter. It will be a bit bitter.

Tips: Lotus seeds are not suitable for long-term consumption. They will have a bad impact on people with cold constitutions and are not good for health. People who usually have dry and hard stools or have a distended abdomen should not eat it.