Toxins can affect hormonal systems in several ways. They may mimic natural hormones, blocking or activating hormone receptors inappropriately. These substances, known as endocrine disruptors, can lead to imbalances by either increasing or decreasing hormone production. Common examples include bisphenol A (BPA) and phthalates, which are often found in plastics and personal care products. These disruptors can interfere with estrogen and androgen receptors, leading to reproductive and developmental issues.