I've been vegan for around five years, since I was fifteen. I was doing fine, but since last year I've struggled with fatigue and concentration problems. I tried to correct the most "common" problems, B12, calcium, vitamin A and D deficiency, poor protein intake, zinc, iron... but nothing has worked. It's frustrating because almost every [censored]ing nutritional problem causes fatigue and brain fog, so is imposible to tell what is wrong unless you try all the blood tests in existence.
The last two options in my mind are a diet poor in fat and omega 3 deficiency (I didn't really consider it till now, because when I was a child I never ate fish, and neither did my family, that aren't vegetarian and always were ok, so I thought it was not a problem). But I can´t keep guessing. I`m a student and I don't have a lot of money to spend buying all the superfood and supplements that, maybe, could help me.
I went to a couple of nutritionist and doctors, but none of them knew how to handle the situation. The best advice was the typical "Just eat meat and everything will be ok".