You need the fibre and the vitamins and minerals they pack.
The brighter coloured berries in summer help, the orange and yellows of some of the root vegetables, the leafy greens. I started typing up the scientific names and specific uses but I cant be arsed. The info is available online if you're interested.
My bro's mates are all bodybuilders and I've been watching them since I was tiny.
Like anything, its all fine when you're young and your body does everything at high speed, effortlessly while you party your arse off with little sleep. When things slow down and the injuries start catching up you need to have covered as many bases as you can.
These guys are popping vitamins and glucosamine sulphate like its going out of style. They also creak like houses when they get up from chairs.
Some of the natural guys max out on vegies and berries in summer, and supplement antioxidants in winter. They crack a handful of almonds and walnuts and eat them on the spot for snacks. The journey taken by the ready packaged stuff has oxidised all the good oils, they reckon.
As usual there are some smug bastards that eat what they like, drink and treat their bodies like crap and still look ripped. Strong genetics is a lottery.
One of the guys has developed allergies and has gone gluten free, but then his girlfriend drives him nuts, so who knows. An Italian who cant eat bread, pizza or pasta anymore............
It's the one thing about being a BB fan that bugs me. When I hear of guys having heart attacks and bypasses in their late 30's, early 40's and other serious gizzard problems I wonder if its worth it.
Good luck with it.