Drinking noni juice will not cause abnormal menstruation. Abnormal menstruation is also known as menstrual disorders, Noni juice’s main ingredients are Noni, blueberries and grapes, drinking will not cause menstrual disorders. Causes of menstrual disorders are physiological factors (such as irregular diet, excessive tension, etc.) and pathological factors (such as endocrine diseases, organic lesions of reproductive organs, etc.). 1. Physiological factors: (1) Dieting: Dieting can cause estrogen synthesis disorder, thus affecting the menstrual flow, resulting in scanty menstrual flow or amenorrhea. (2) Excessive tension: Sudden or prolonged tension and anxiety can affect the functions of the hypothalamus and pituitary gland, thus leading to irregular menstruation. 2. Pathological factors: (1) Endocrine diseases: such as diabetes mellitus, hyper- or hypothyroidism, etc., can affect the neuroendocrine regulation of the HPO axis, thus leading to menstrual irregularities. (2) Organic lesions of reproductive organs: such as uterine fibroids, endometriosis, cervical polyps, etc., can lead to irregular menstruation. It is recommended that patients go to the hospital in time, after clarifying the cause of the disease, receive treatment as soon as possible.