Pyrroloquinoline quinone (PQQ, Methoxatin) is a natural anti-oxidant with anti-oxidative and anti-aging effects. Pyrroloquinoline quinone prevents estrogen deficiency-induced osteoporosis.Pyrroloquinoline quinone can alleviate allergic airway inflammation in mice by improving the immune microenvironment and regulating the JAK-STAT signaling pathway. This product has poor solubility, animal experiments are available, cell experiments please choose carefully!