I have quit tobacco 16 years ago., in my 20's. i am currently 43. i drink green tea with tumeric, blackberrys, bberries am i at risk for oral cancer?

Much decreased: Non-smokers have much decreased risk of cancer from smoking, but it never returns to the baseline of a non-smoker. More information here: https://www.oncolink.org/risk-and-prevention/smoking-tobacco-and-cancer/former-smokers-and-cancer-risk

Oral cancer: Bone cancers usually genetic. Soft tissue cancers usually from irritation such as, but not limited to, tobacco use, alcohol abuse, ill fitting dental appliances, sharp edges on broken teeth/fillings, etc.

If: you smoked for less than twelve years total, then after quitting for 10 years, your chance of smoking related cancer falls to the level of non smokers.