I sort of have a deficiency in aspartic acid. My doctor said that it's on the border.
I didn't want to take any synthetic substitutes though so I'm trying to improve my aspartic acid levels through my diet.
I'm trying to eat more fish, meat, more seeds like sunflower seeds, eggs and tomatoes. My doctor said that all of these are particularly high in aspartic acid.
I have been feeling better, especially my mood is better than usual. I think not having enough aspartic acid was having a depressive affect on me but I didn't realize. Thankfully it's nothing that a healthy and nutritious diet can't fix.