Natalie Grams (born 12 April 1978) is a German physician and author.
Formerly a practicing homeopath, she became known throughout Germany as a whistleblower for her 2015 debut book Homeopathy Reconsidered — What Really Helps Patients in which she criticized homeopathy.
In 2016 she joined the Science Council of the Society for the Scientific Investigation of Parasciences (GWUP - the German Sceptics Association).
and in January 2017 she became Communications Manager for the GWUP.
She also serves on the advisory board of the humanist Giordano Bruno Foundation since May 2017, and as vice president of the Humanist Press Foundation in Germany since October 2017.
In October 2017 her second book, Gesundheit — A Book Not Without Side Effects, was published.