This wine has been adulterated with many additives.
Tips
usage
掺 often implies adulteration — adding something to dilute or degrade quality: 掺水 (water down), 掺假 (adulterate with fakes). 掺和 (chānhuo) colloquially means to get mixed up in something or to butt in.
mistakes
Don't confuse 掺 (chān, to mix/adulterate) with 搀 (chān, to support by the arm). They are homophones but have very different meanings.