White spots on the skin: Which vitamin deficiencies could be the cause?

in the hands and feet.
 Vitamin D Deficiency:
Vitamin D is another essential nutrient for skin  health. It is primarily produced in the skin through exposure to sunlight and is vital for the immune system and skin cell growth. A  vitamin D deficiency can contribute to skin problems such as white patches or uneven pigmentation.
People who spend little time outdoors or have darker skin are particularly at risk, as they produce less vitamin D. Taking vitamin D supplements or moderate sun exposure can help restore vitamin D levels and improve skin appearance.
Calcium and other minerals:
Calcium works closely with vitamin D to maintain healthy bones, but it also affects the skin. Low calcium levels can, though less commonly, lead to changes in skin pigmentation, including white spots. A deficiency in zinc and copper can also affect skin pigmentation, as these minerals are involved in the production of melanin,