Most of the vitamins are not produced by our body. Even Vitamin D that is mostly produced within our bodies, needs an external influence – UVB rays – to get the process done. Hence, there are definitely many lifestyle changes that can be done to improve vitamin deficiency. Eat a balanced diet that gives you all the necessary vitamins. Spend some time under the sun to generate enough Vitamin D. Get a vitamin deficiency test done and consult a nutritionist to draw a balanced diet plan in case you are suffering from various vitamin deficiencies.