What effects can result from excessive intake of vitamin D?

Excessive intake of vitamin D can lead to toxicity, resulting in a condition known as hypervitaminosis D. One of the notable effects of this condition is appetite loss, which can consequently contribute to weight loss. This occurs because high levels of vitamin D can disrupt normal metabolic processes and lead to nausea, vomiting, and a lack of interest in food consumption.

In contrast, other options such as improved skin health or enhanced immune function are positive effects typically associated with appropriate levels of vitamin D, rather than excessive intake. Excessive vitamin D does not contribute to increased energy levels or vitality; rather, it can lead to a range of negative health consequences, including the aforementioned appetite and weight issues. Therefore, understanding the implications of vitamin D intake is crucial for maintaining both overall health and effective dietary practices.