Increase Serotonin

I (and others around me) have noticed that I have become increasingly hostile, aggressive and moody. I do not know why that is because I am a nice person but I think this may be due to low serotonin levels or high levels of testosterone. I was wondering if there is anything natural that I can eat or drink or do that will increase or decrease these two?

Thank you in advance.

You can increase serotonin levels in exercise and diet. protein-rich foods hard cheese, high-carbohydrate meal, Turkey, Black Eyed Peas, black and English walnuts, almonds, sesame or pumpkin seeds, and cheddar, gruyere or Swiss cheese. Also contributes to a lesser extent, whole grains, rice and other dairy products. There are also bread, pasta, sweets, but they are not so good in other respects.

High concentration of serotonin
Bananas
Kiwi
Pineapple
Plantains
Plums
Tomatoes

Moderate concentration of serotonin
Lawyer
Black Olives
Broccoli
Cantaloupe
Cauliflower
Dates
Eggplant
Figs
Grapefruit
Honeydew
Spinach