If anyone is doing that many hours working then any additional supplementation and vitamins would be beneficial. Your body will slow you down if you don't, rest is vital at least getting a power nap during the day, even 10mins can really do wonders.
Imo there is eating healthy and eating smart. Healthy is eating foods that are considered good for your health. But unless you are eating the 'right' foods at the 'right' time, especially when you are undergoing physical aswell as mental work, then your not likely to benefit as much.
Brain food is what I endeavour to consume everyday, fo