Thanks for answering.
I think there's a graph around here with serotonin content of many fruits. If I remember correctly, pineapples and plantains/bananas had the highest concentration. Oranges seemed to have very low serotonin. Are you worried about the lycopene content in some fruits like watermelon? It seems to lower DHT.
Oh okay, I didn't remember watermelon had lycopene. Yeah I would avoid those. You may be right about pineapple, there was another study showing oranges had more than most though. I treat them more like "dessert" anyway, I get most carbs from my veggies, maple syrup or a mix of maple flakes (for potassium) and white sugar when I do shakes.