Ⅰ What does huperzine-A extract do for you? People use huperzine-A extract to improve memory and mental function in people with Alzheimer disease or other types of dementia. It is also used for depression, schizophrenia, and many other conditions, but there is no good scientific evidence to support these uses. Ⅱ Is it OK to take huperzine-A extract  everyday? There is no recommended daily allowance for huperzine A. The following doses have been studied: Alzheimer’s disease: 300 mcg to 500 mcg daily. Ⅲ Does huperzine-A extract have side effects? When taken by mouth: Huperzine A is possibly safe when taken for less than 6 months. It can cause some side effects including nausea, diarrhea, vomiting, dry mouth, constipation, sweating, and blurred vision. Ⅳ Is huperzine-A extract  FDA approved? Huperzine A for many years has been widely used in traditional Chinese medicine to enhance memory and to treat fever and inflammation. In the United States it is commercially available as a … Continue reading Huperzine-A extract supplier