Myths vs facts: Homocystein and Fruchtbarkeit

Homocysteine is a sulfur-containing amino acid whose elevated levels have been linked to fertility issues. Observational studies associate high homocysteine with recurrent pregnancy loss, endometriosis, and male infertility. However, the evidence is largely associative; a direct causal role is not firmly established. Fact: Deficiencies in folate, vitamin B12, and B6 can raise homocysteine, and supplementation of these B vitamins effectively lowers it. Myth: A homocysteine test alone can diagnose fertility problems – it cannot. It is a risk marker, not a diagnostic test. Another myth is that every elevated level requires treatment; for moderate elevations without clinical context, the benefit is unclear. For couples struggling with infertility, checking homocysteine may be reasonable as part of a broader workup. Consumer DNA tests often overemphasize MTHFR variants as key drivers, but the clinical utility of such testing remains debated. In summary, homocysteine is a piece of the puzzle, not the whole picture. Evidence-based fertility care should integrate multiple biomarkers and clinical history.