Chlorogenic Acid Side Effects
If you choose to take green coffee or green coffee extract for its chlorogenic acid benefits, there are a few side effects that you need to be aware of. In most forms, green coffee can be consumed multiple times a day up to around 500mg total. Like with other supplements, you should not exceed the recommended amount or the amount of time suggested to take it. For example, with the green coffee, you should not take it longer than 12 weeks.
Because green coffee contains caffeine, you may experience side effects that come with caffeine. There are some green coffee beans on the market that contain as much caffeine as normal coffee, so you should be aware that it can cause nausea, upset stomach, restlessness, and insomnia. If you are pregnant or breastfeeding, you should stay away from chlorogenic acid and green coffee until you have been cleared by your doctor. There is not enough evidence to show whether it is safe for pregnant women or not.