Zinc is an essential mineral that helps the immune system, protein and DNA production, wound healing, and taste/smell. Good sources include oysters, red meat, poultry, seafood and fortified cereals. A zinc deficiency can cause slow growth, hair loss, diarrhea and weight loss. Phosphorus is important for energy, protein/fat/carb synthesis and fluid levels. Good sources are meat, dairy, nuts and whole grains. Too little phosphorus can weaken bones while too much from junk food may impact calcium levels.