The World Health Organization recommends that the daily intake of dietary fiber for adults is 25-35 grams

The World Health Organization recommends that the daily intake of dietary fiber for adults is 25-35 grams, while the "Dietary Guidelines for Chinese Residents 2016" recommends that the appropriate daily intake of dietary fiber for adults is 25-30 grams. However, from the current data, dietary fiber intake in all regions of the world is basically below the recommended level. The data show that adults in North America consume an average of 17 grams of dietary fiber per day, the intake of European countries is slightly higher, 18 to 24 grams per day, Australian citizens consume an average of 20.7 grams per day, the average intake of 19 grams per day in the United Kingdom, the average intake of 14.5 grams per day in Japan, our average daily intake of 18.5 grams, but the good news is that Although the intake of dietary fiber is insufficient, the daily intake per capita in China is increasing year by year (in 2016, the daily intake per capita was 13 grams). Similar to consuming too much sugar, not eating enough fiber can also be harmful. Studies have found that a low-fiber diet can cause constipation, irritable bowel syndrome, cardiovascular disease, and cognitive impairment and hippocampal microglia-mediated synaptic loss through gut microbes and metabolites. Chengjun Hu et al. found that maternal high fat/low fiber diet can induce maternal metabolic disorders and placental dysfunction, impair neonatal glucose tolerance, induce glycolytic muscle fiber formation, and reduce liver and muscle mitochondrial function. Therefore, the trend of "fiber +" can alleviate the harm caused by insufficient dietary fiber intake to a certain extent.