Instant coffee is a lifesaver for coffee lovers who are pressed for time or can’t find a nearby coffee place. While instant coffee offers many health benefits that regular coffee does, such as boosting your metabolism, increasing longevity, and decreasing the risk of developing type 2 diabetes, there are also a couple of downsides to drinking it.
Instant coffee has less caffeine than regular coffee. Additionally, because instant coffee is so convenient, has a longer shelf life, and is easy to make, there is the potential of drinking more cups than intended, leading to sleep disruption and upset stomach, specifically for those sensitive to caffeine.
Instant coffee also contains about two times more acrylamide, a chemical formed when coffee beans are roasted and may increase the risk of cancer and be harmful to the nervous system. Still, it's worth noting some experts say the amount in instant coffee is considered safe and should not deter anyone from drinking it (via Medical Daily).