For general fitness I wouldn't bother with supplement at all. Imo, keep it as fresh, wholesome as possible. Have meats and fish for your proteins, fruit, veges, and plenty of fluid. You not an athlete who requires extra support on the top of a proper daily diet. In fact my professional athlete mates always said that keeping away from supplement as much as possible is the key.
I hardly ever now have protein powder shakes. The only time I would, is after rugby games. On the daily basis supplement I take is fish oil. Even with that, I only take it for a month or so and give it break. On days that I know I will be having fish, I don't take the fish oil.
And you boss is not necessary right. It depends on type of exercise you do. Protein in the recovery mode is very important. But in your situation, where you only do an aerobic type of exercise, you don't need high protein intake. Some protein needed. Again, keep it simple and nourish your body with proper foods, not chemicals.