What role does Nährstoffcheck play in Schlaf?

The provided context does not contain specific data or studies on the Nährstoffcheck (nutrient deficiency test) and its role in sleep. While general knowledge suggests that deficiencies in nutrients like magnesium, vitamin D, or B vitamins can affect sleep, the direct benefit of a nutrient check for sleep improvement is not supported by the given material. MyBody-X markets such tests, but without clear evidence for a direct sleep effect. A reliable assessment requires individual blood tests and professional medical advice. Based solely on the context, the role of the nutrient check in sleep remains unclear.