Is Nährstoffcheck useful for fertility?

The usefulness of a nutrient check (Nährstoffcheck) for fertility depends on context. Certain nutrients—folate, vitamin D, zinc, selenium—are critical for reproductive health, and deficiencies can impair fertility. A targeted blood test can identify such deficiencies, allowing supplementation. However, evidence that routine comprehensive nutrient screening improves fertility outcomes in all couples is limited. Most support comes from clinical practice and observational studies, not large randomized trials. Moreover, many commercial tests (e.g., IgG food intolerance panels) lack validation for fertility. A focused check based on individual risk factors (diet, medical history) may be beneficial, but broad testing without indication is not evidence-based. Caveat: Results must be interpreted alongside overall health, not as standalone predictors.