How are Nährstoffcheck and fertility related?

The provided context does not directly address the Nährstoffcheck (nutrient check) from MyBody-X or its relation to fertility. It is well established that nutrient deficiencies—such as vitamin D, iron, folate, and zinc—can impact fertility. However, the tests mentioned in the context (Vitamin-D Selbsttest, Women's Wellness Check) are lifestyle tools, not medical diagnostics. The Vitamin-D test gives only an approximate 25-OH-D3 value, and the Women's Wellness Check does not specifically measure iron or vitamin D according to the context. There is no evidence from the context that the Nährstoffcheck measures fertility-related markers. Therefore, while a link between nutrient status and fertility is biologically plausible, the specific relationship with this product is unsupported by the given information. For fertility assessment, clinical lab testing and medical consultation are recommended. The evidence is rated as unclear because marketing claims cannot be distinguished from scientific evidence.