The effect of sugar consumption on the body is similar to that of drug usage. One can become addicted to sugar because, like nicotine, amphetamines, and cocaine, it activates the brain’s reward system by releasing Dopamine. This can result in cravings and continuing behavior despite negative consequences, tolerance, and withdrawal.
Although there is no concrete evidence that sugar is physically addictive to humans, negative consequences of consumption include type-2 diabetes, weight gain, and dental cavities. Sugar replacements actually impact the brain in a similar way that sugar does, so they are not much better alternatives. Quitting sugar and sweeteners all together may improve skin, sleep, and moods.