Overview

• Lynn Shazeen, 28, began drinking matcha about once a week and developed fatigue, feeling cold, and occasional heart palpitations after roughly three months.
• Hospital tests showed an iron-related measure fell from 23 to 13, according to her reported results.
• Doctors administered an IV and prescribed iron supplements, and she has stopped drinking matcha and added vitamin C.
• She and her doctor said they ruled out other changes and concluded the matcha was the likely contributor to the decline.
• Green tea catechins can inhibit absorption of dietary iron, which is a particular concern for people with anemia, according to NIH-supported studies.