Research suggests that energy drinks can pose significant short-term health risks. If you drink them on an empty stomach, their contents will be absorbed into your bloodstream very quickly, which could increase the risks.
Caffeine overdose
Energy drinks can contain 40–250 mg of caffeine per cup. If you drink one or more of these beverages without food in your stomach to slow down your caffeine absorption, you could overdose.
Cardiovascular problems
Caffeine is a stimulant that can speed up autonomic nervous system functions such as your heart rate and blood pressure. And you might be more likely to feel the cardiovascular effects of caffeine if you consume it on an empty stomach.
The authors of a
Other reported cardiovascular problems included:
Dehydration
Caffeine is a diuretic, which means it makes you produce more urine than you usually would.
Indeed, dehydration is a commonly reported side effect of energy drink consumption, according to the authors of a
Energy shots, in particular, typically contain a high dose of caffeine in relatively little liquid. They may be more likely to cause dehydration, especially when consumed on an empty stomach.
Headaches
Some people find that consuming too much caffeine gives them a headache, a symptom that is often a result of dehydration.
In the
But it’s not clear whether you’re more likely to experience a headache if you have an energy drink on an empty stomach.
Upset stomach and other digestive issues
The ingredients in energy drinks can irritate your gastrointestinal (GI) tract. The authors of the same
According to research reviews from 2017 and
- abdominal pain
- gastritis
- GI upset
- nausea
- vomiting
Kidney or liver problems
The authors of the
The authors propose that this side effect may be due to large doses of ingredients that can harm the liver, such as caffeine and vitamin B3.
Stress, restlessness, and insomnia
Caffeine and sugar may temporarily increase energy, but many people report an accompanying sense of anxiety or restlessness that may get in the way of sleep.
In the
- difficulty sleeping (insomnia) in 35% of study participants
- stress in 35% of study participants
- jitteriness, restlessness, or shaking hands in 25% of study participants
- a “jolt and crash” sensation in 23% of study participants
It’s not clear whether these symptoms would be more noticeable if you consumed energy drinks on an empty stomach.
Are any energy drinks safe for kids?
Many energy drinks contain large amounts of caffeine and sugar and are therefore not safe for kids. The American Academy of Pediatrics recommends that children and teenagers avoid energy drinks altogether.
Can energy drinks damage your stomach?
Drinking them too often might damage your stomach. While this side effect hasn’t been widely studied, the authors of a
Why do I feel sick after drinking an energy drink on an empty stomach?
The ingredients in energy drinks can cause your stomach to produce excess acid, which could give you heartburn or leave you feeling bloated or nauseated.
Should you drink caffeine on an empty stomach?
Caffeine’s effects might be more noticeable if you consume it on an empty stomach. But it’s probably fine to consume small amounts of caffeine on an empty stomach as long as you’re staying hydrated and eating regularly.
Energy drinks may contain large amounts of caffeine, along with sugar and other additives. While they might give you a quick boost of energy, they come with a risk of side effects.
The possible side effects might be more severe if you consume energy drinks on an empty stomach. Some of the most commonly reported side effects are irregular heart rhythms, GI upset, and anxiety. But these effects are not necessarily related to drinking energy drinks on an empty stomach.