One study in rats, although dating back to 1988, was published in Food and Chemical Toxicology and indicated no adverse effects to consuming tartrazine. There are not many current studies on the effects of tartrazine on fertility. Also, people often cite that tartrazine is a potential allergen as part of the myth. Tartrazine is what gives Mountain Dew its yellow color. The chemical name of yellow dye 5 is tartrazine. Yellow dye 5 is one of the most commonly used food additives. But it is doubtful that Mountain Dew’s caffeine content would affect fertility when consumed in moderation. People should still watch their caffeine intake, although caffeine is unlikely to affect fertility. Mountain Dew (in various flavors): 55.0 mg.Mountain Dew has a higher amount of caffeine in a 12-ounce (oz) serving than some other soft drinks, which has lead to people taking it as proof that Mountain Dew affects fertility.Ĭomparing 12 oz servings of Mountain Dew and other drinks shows only a small difference in the amount of caffeine in each: The researchers concluded that results were not consistent enough to be conclusive, despite some evidence of negative effects. The Nutrition Journal reviewed 28 studies that looked at different sperm measurements. Share on Pinterest Mountain Dew does not contain enough caffeine and yellow dye 5 to affect fertility.

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