It all comes down to aspartame. It is widely used in more than 6.000 foods, starting from sugar-free soft drinks and desserts and ending up with medications, such as cough drops and gummy vitamins to add a touch of sweetness to it. You can recognize aspartame by food additive number E951.
According to a recent study, a concussion seems to accelerate biological brain aging by as much as 30 years!