gained - Gains is when you get all big and buff because of tuna. Tuna

Gains is when you get all big and buff because of tuna. Tuna is the only thing that can make you gains.

I ate tuna for breakfast, lunch, and dinner. Now I have gains.

My gains are all from tuna. Tuna is the best.

I got gains from tuna and now I look like a tuna.