Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Vitamin D is increasingly recognized for its role in supporting the reproductive system, with a growing body of scientific research exploring its influence on fertility, pregnancy outcomes, and hormonal regulation. Vitamin D receptors are present in reproductive tissues, including the ovaries, endometrium, testes, and placenta, suggesting a physiological role in reproductive health. In women, studies have linked adequate Vitamin D levels with improved ovarian reserve, better in vitro fertilization (IVF) outcomes, and a lower risk of polycystic ovary syndrome (PCOS). Some research also indicates that Vitamin D deficiency may be associated with menstrual irregularities and increased risk of endometriosis. In men, Vitamin D has been implicated in supporting healthy testosterone levels and sperm motility, though data are less robust.

During pregnancy, sufficient Vitamin D status is associated with reduced risks of gestational diabetes, preeclampsia, and adverse birth outcomes. However, while observational studies often show positive associations, intervention trials and meta-analyses provide mixed results, and optimal dosing strategies remain under investigation. Overall, while Vitamin D is not traditionally associated with reproductive health, there is moderate scientific evidence supporting its role in reproductive physiology and outcomes, justifying its use in supporting the reproductive system, especially in individuals with deficiency.

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