Lack of energy is a huge problem for lots of people (including me) that’s resulting in less productivity, bad mood, tiredness, etc. It’s messing with your work and your day to day life so it’s not a small issue. Good energy is required to get things done.
I know a lot about nutrition and diets, supplements and medication, psychology and all kinds of stuff that can help or mess up your energy. It’s not an easy thing to fix but it’s necessary if you need to accomplish more or just feel better.