Original sentence: "  Poorly planned vegan diets, however, increase the risk of deficiency in nutrients such as vitamin B, vitamin D, calcium,.Because a poorly managed vegan diet can lead to reduced levels of calcium, iodine, and vitamins B and D, vegans are encouraged to take supplements made from bacteria and non-animal sources
Edited sentence: "  Poorly planned diets, however, increase the risk of deficiency in nutrients such as vitamin B, vitamin D, calcium,.Because a vegan diet can lead to reduced levels of calcium, iodine, and vitamins B and D, vegans are encouraged to take supplements made from bacteria and non-animal sources