Usage patterns
栄養を摂るto take in nutrition; to get nutrients
I try to get nutrients from vegetables.
栄養があるto be nutritious; to have nutritional value
This fish is said to be nutritious.
栄養が偏るfor one's nutrition to become unbalanced
If you eat out too often, your nutrition tends to become unbalanced.
栄養不足になるto become deficient in nutrition
An unbalanced diet is a cause of nutritional deficiency.