Porphyra is also a food rich in calcium ions. When eaten with persimmon containing too much tannic acid, it will form an insoluble combination, similar to the relationship between kelp and persimmon.
Persimmons and sweet potatoes.
Persimmons are sweet and cold. It can clear away heat, promote fluid production and moisten the lungs. Contains protein, sugar, fat, pectin, tannic acid, vitamins, inorganic salts and other nutrients. Sweet potato is sweet, flat, invigorating qi, invigorating qi, strengthening kidney yin, and contains a lot of nutrients such as sugar. These two foods are good for your health, but if you eat them at the same time, they are harmful to your health.
Because people eat sweet potatoes, a lot of hydrochloric acid will be produced in their stomachs. If they eat more persimmons, persimmons will precipitate under the action of stomach acid. Deposits piled up together will form water-insoluble lumps, which are difficult to digest and discharge, and people will easily get stomach persimmon stones. If it is serious, you need to go to the hospital for surgery.