Aspartame

It is not known. There are many reports of headaches caused by 'aspartame', but headaches are one of the main complications that arise from the placebo effect as well. In trying to establish whether a difference exists between placebo and aspartame in regards to headaches, only one blinded study has been conducted and it was riddled with errors. There is not enough evidence to make a final conclusion either way. Use your own judgement, as headaches are something you are aware happens and can avoid if caused by the diet...

Diet Soda and Fat loss Biochemically speaking First, let's define 'diet soda' as any drink that is sweetened with low to no calorie sweeteners (like sucralose, aspartame, acesulfame-potassium, etc.) in order to taste like regular (sugared) soda. In short, there are no direct causative studies that show the use of artificial sweeteners slows your metabolism or promotes fat storage...

Simply put... Currently available research into diet soda and long-term health risks is insufficient, although there are specific areas where risks are unlikely. Contrary to popular belief, diet soda (defined as calorie free carbonated beverages sweetened with aspartame, sucralose, acesulfame-potassium, or other non-caloric or minimally caloric sweeteners) doesn't inhibit fat loss, or spike insulin levels. Current research that attempts to link diet soda with type 2 diabetes and metabolic syndrome[15][16] did not have equal caloric consumption...