Whether glucose can help with fertility is not clearly supported by evidence. Glucose is the main energy source for cells, including eggs and sperm, and stable blood sugar is important for reproductive health. However, no high-quality human studies demonstrate a direct fertility-enhancing effect of additional glucose intake. Conversely, elevated blood glucose—as seen in diabetes or insulin resistance—can impair fertility by disrupting hormone balance (e.g., increased androgens in PCOS) or reducing egg quality. The evidence level is therefore 'mechanistic' or 'unclear'. A balanced diet with complex carbohydrates is recommended; isolated glucose supplements are not indicated for fertility. Caveat: Unexplained infertility requires medical evaluation.
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