Poewe W, Seppi K, Fitzer-Attas CJ, Wenning GK, Gilman S, Low PA, et al. Efficacy of rasagiline in patients with the parkinsonian variant of multiple system atrophy: a randomised, placebo-controlled trial.
Bread is good for you, but as with anything we eat too much of anything is bad for you. Notice also if you have bread alot, in the morning you will feel a hole in your stomach, you will be starving in the morning. That's the effect of carbs. But lack of rest and sleep will cause eyebags to droop like bin liners.
For example, you may notice that you go hungry within two hours after eating two slices of white bread with peanut butter and a glass of milk, which means that it is approximately how long it takes you to digest the complex carbs in white bread.