I want to start drinking green tea to help with weight loss. i've been on nexplanon since last august, will this affect my contraceptive in any way?

Should be ok: Drinking green tea (choose one that contains no sugar and little or no caffeine) can help with weight loss if it is substituting for other drinks that contain calories. Drinking green tea before each meal can also fill up the stomach somewhat, and make a person satisfied with a smaller meal. Green tea should not make Nexplanon any more effective nor any less effective.