What are the pros & cons of drinking coffee and its effects on the human liver?

Coffee pros & cons. Coffee contains antioxidants that may offer some cardiovascular protection. Studies have shown that it may reduce the risk of developing type 2 diabetes, gallstones, dementia, Parkinson's disease, prostate, colon and liver cancer. It may improve your mood and relieves headache. However, you should probably drink coffee in moderation as it can cause anxiety, insomnia, heart burn, and dehydration.