Stevia in water is contraindicated mainly for allergy sufferers, menstruating women should not drink, when using stevia in water, according to their own situation under the guidance of the doctor to drink reasonably. 1. Allergy: Stevia is flat, sweet, has the effect of thirst, lowering blood pressure, but if you are allergic to stevia, it is not suitable for consumption, it is easy to cause the body to itchy skin, redness and swelling and other allergic reactions. 2. Menstruating women: the body of women during menstruation is relatively weak, stevia has the effect of lowering blood sugar, should not be taken in large quantities during menstruation, may have an impact on women’s menstruation, resulting in menstrual disorders. When using stevia in water, you should consult a professional doctor before drinking it according to your own constitution, and at the same time, control the dosage so as to avoid adverse effects on your body.