Which of the following diets is lacking in nutrients that will help hair, skin, and nails to grow?

There is no one diet that will help your hair, skin and nails grow. However, there are certain nutrients you can add to your diet in order for them to be healthy. For instance, Vitamin C helps with growth of the collagen which keeps the skin smooth and elastic; it also aids in healing wounds on the body like cuts or scrapes. Biotin has been shown to increase nail strength while improving overall appearance by strengthening cuticles as well as helping improve circulation within the scalp. Zinc strengthens hair follicles which prevents breakage while boosting natural shine and luster. You may need a combination of these vitamins but ultimately what works best for each individual person’s needs varies from person to person based on their specific health goals.