Get some variety – make plan out your meals for the week.
You know that eating an entire box of cookies in one sitting isn’t good for you—but experts say overdoing it with certain more nutritious foods could be just as dangerous. There’s no need to ditch these foods from your diet altogether—but you’ll want to avoid taking in excessive amounts since that’s when they can start to compromise your health.
Lots I know of in body building use tuna/fish for their protein, so I defer to their resources (like this one) because they tend to be a big (heh) group with reasonable testing and assessment skills.
There’s also Carotenosis, which is harmless. It’s where the skin takes on an orange hue, from eating foods high in carotenoids (IE: carrots).