❓Is there any basis for the claim that "eating vegetarian causes early menopause"?

There's currently no reliable large-scale research supporting the claim that eating vegetarian causes early menopause. Age at menopause is mainly influenced by factors like genetics, smoking history, age at first period, and overall health — diet pattern (vegetarian or not) hasn't been proven to be a major determining factor. Some observational studies have looked at the relationship between overall diet quality, weight, BMI, and age at menopause, but what those findings point to is whether overall nutritional status is good, not the single variable of whether meat is eaten. Long-term calorie or nutrient insufficiency, regardless of whether it's due to a vegetarian diet, can genuinely affect endocrine function, and that's the real thing worth paying attention to. If this is a concern for you, rather than agonizing over whether to eat vegetarian, it's more practical to focus on whether your overall nutrition is balanced, whether your weight is in a healthy range, and whether you're getting hormone-related markers checked regularly — putting your attention on these more clearly relevant factors is more useful.