There may be a physiological basis for jealousy: highly jealous individuals have higher levels
of estrogen.

Question

Quizplus · Accepted Answer

Studies have found that individuals who are highly jealous have higher levels of estrogen. This could be because estrogen affects the areas of the brain involved in social and emotional processing. However, it is important to note that other factors such as upbringing, past experiences, and cultural beliefs can also influence jealousy.

There May Be a Physiological Basis for Jealousy: Highly Jealous