Final answer:
High doses of beta-carotene can lead to an increased risk of various health issues, such as certain types of cancer, heart disease, and possibly depression, highlighting the importance of balanced intake and caution with supplementation.
Step-by-step explanation:
Large doses of beta-carotene can lead to several potential health risks. While beta-carotene is an antioxidant and a provitamin that the body can convert to vitamin A, high levels of supplementation have been associated with an increased risk of various cancers, including lung cancer in smokers, and possibly prostate, ovarian, and colon cancers.
Chronic high intake may also contribute to the risk of other health issues like heart disease, osteoporosis, and macular degeneration. There is also evidence suggesting potential adverse effects on mental health, including an association with an increased risk of depression. It's important to balance beta-carotene intake and to be cautious about excessive supplementation, especially for individuals who may be at higher risk for these health concerns.