4. Eat five to seven servings of fruits and vegetables every day.
There’s no study showing that amount is optimal. Studies do show that people who eat more fruits and veggies tend to be healthier. But no one has compared five to seven servings to, for example, three to five.
So do eat plenty of fruits and vegetables. And if having a number of daily servings to shoot for helps you, great. But don't get too obsessed with that 5-7 number.