Scientists are not exactly sure why zero calorie drinks cause weight gain but one theory is that zero calorie sweeteners interfere with signals to the brain that tell us when we are full. Gotta love the diet industry. :)
Info below from the article - Top 10 Energy Drink Dangers
"Top Ten Dangers of Drinking too Many Energy Drinks at One Time:
Cardiac Arrest: While our Death by Caffeine Calculator can show people how many energy drinks at one time would be lethal, this formula doesn’t apply to everyone. Those with underlying heart conditions have gone into cardiac arrest after just a few energy drinks. Before drinking energy drinks or caffeine, be sure to know your heart’s health.
Headaches and Migraines: Too many energy drinks can lead to severe headaches from the caffeine withdrawal symptoms. Changing the amount of caffeine you injest daily can cause more frequent headaches.
Insomnia: Energy drinks do a good job of keeping people awake, but when abused, they can cause some people to miss sleep all together. This lack of sleep causes impaired functioning and can be dangerous to drive or perform other concentration heavy tasks.
Type 2 Diabetes: Because many energy drinks are also very high in sugar, they can eventually wear out the insulin producing cells of the pancreas, which leads to type 2 diabetes.
Drug Interaction: Some of the ingredients in energy drinks can interact with prescription medications especially medications taken for depression.
Addiction: People can become addicted to caffeine and energy drinks. This can lead to lack of functioning when unable to have the energy drink or a financial stress from having to buy several energy drinks daily.
Risky behavior: There was a study published in The Journal of American College Health which showed that teens are more likely to take dangerous risks when high on caffeine. This could result in injury or legal trouble.
Jitters and Nervousness: Too much caffeine from energy drinks causes some people to shake and be anxious. This can interfere with performing needed tasks or cause emotional issues. A study out of Perth, Australia found that even just one 250ml energy drink can increase anxiety in young men.
Vomiting: Too many energy drinks can lead to vomiting. This causes dehydration and acid erosion of teeth and esophagus if frequent.
Allergic Reactions: Because of the many ingredients in energy drinks reactions could occur, from minor itching to airway constriction."
Caution with Energy Drinks -- The FDA has released reports showing deaths and other serious adverse events associated with the use of energy drinks like 5-hour Energy. As ConsumerLab.com reported in September, these small "shot" drinks can pack more caffeine than 2 cups of regular coffee. While the caffeine can keep you alert, there are a number of concerns to bear in mind and suggestions on how to more safely use these drinks.
Absolutely. Energy drinks are full of chemicals, minerals and other things that have not been studied in great depth. Take a minute and read all of the ingredients in your favorite energy drink and then research each ingredient. So much of the garbage in "energy drinks" are things that you'd never go eat a spoon full of, so why consume it in small quantities?
Think of it this way. If you need an energy drink to get through your day or your work out, something is wrong with your diet.
What happens when you mix an "energy drink" with alcohol? Well, you're mixing a stimulant with a depressant. In short, you end up being a cranked up drunk.
The choice is yours, but energy drinks are garbage. Eat right, drink plenty of water, exercise regularly, get plenty of sleep and your body is always ready to go.
As Red_Star clearly pointed out, non-nutritious sweeteners have been linked to a number of problems, to include neurological damage. Excess sugar, on the other hand, raises glucose levels, contibuting to diabetes. Her coments are on-the-money. The problem with caffeine is that it increases ventricular irritability. And increases the heart-rate. When the ventricles of the heart become irritable they tend to be susceptible to throwing what are called PVC's (premature ventrricular contractions), and increase the possibility of the heart entering a condition known as ventricular fibrillation. In addition the caffeine causes the heart muscles to become depleted of calcium, a necessary element for proper contraction. This is one of the reasons adding a little milk to coffee is sometimes recommended.