The reason is that the leaves contain saponin, which will form foam and be dirty when scrubbed.
After the hibiscus leaf juice is made into shampoo, the dosage is large, the production time is long and the storage time is short. Even if it is stored in the refrigerator, it will stink the next day, with little foam and insufficient fragrance.
Lotus is full of treasures. Hibiscus belongs to Malvaceae, a deciduous shrub, with oval leaves, flowering in summer and autumn, solitary axillary flowers, purple or pink corolla, hibiscus blooming at dusk, and chemical components: saponin, inositol and mucus. Bark and flowers are used as medicine in Chinese medicine, which can promote blood circulation and moisten dryness. Bark cures leukorrhagia (according to Compendium of Materia Medica), swelling and pain, and scabies; Flowers cure dysentery (according to Materia Medica, people use petals to stir-fry lean meat as nourishing food, and use hibiscus flowers to wash their faces, which can beautify their faces; Washing hair with leaf juice can cure tinea capitis, make hair easy to comb, moisten hair, make hair naturally black and remove dandruff.
Lotus is also a natural antidote. If the toxic substances in the air, such as sulfur dioxide, reach one in 100 thousand, people can't work for a long time; When its concentration reaches four ten thousandths, people will die of poisoning. However, some plants have the ability to detoxify themselves and break down toxic substances into non-toxic substances in the body. Hibiscus is one of them, known as the "natural detoxification machine". Ecologists collected and analyzed the leaves of nine plants with strong anti-pollution ability, and found that the chlorine content in hibiscus leaves and the chlorine content attached to the leaves were the most. It has strong resistance to sulfur dioxide and little damage to hibiscus mesophyll cells. The dust retention of hibiscus leaves ranks third among 18 strains. Therefore, people often plant hibiscus as an environmental helper.