It will not affect menstruation. Spirulina is a type of lower plant, belonging to the phylum Cyanobacteria and the family Oscillatoraceae. Like bacteria, they do not have a true nucleus within their cells, so they are also called cyanobacteria. Spirulina is extremely rich in vitamins and minerals, including vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin E, vitamin K, etc., and contains zinc, iron, potassium, calcium, magnesium, phosphorus, selenium, iodine, etc. The proportion of biological zinc and iron among trace elements is basically consistent with the physiological needs of the human body, and is most easily absorbed by the human body.