Some pesticides, sunscreen ingredients, and chemical products can negatively impact human health and even cause cancer. However, this does not mean that all products should be avoided. The speaker emphasizes the importance of understanding the specific risks associated with certain ingredients or engineering choices. In the case of sunscreen, there are substances called endocrine disruptors that can be harmful. One example is oxybenzone, a common sunscreen ingredient, which is absorbed by the skin and can disrupt hormones. To mitigate this risk, the speaker recommends using natural mineral sunscreen that contains zinc oxide as the main ingredient. While mineral sunscreens may not be as popular due to their cosmetic appearance, they provide a safer alternative. The speaker urges individuals to carefully read the label of sunscreen products and choose those that only contain zinc oxide, avoiding ingredients like oxybenzone, octinoxate, homosalate, and parabens. By understanding the nuances of different sunscreen options, individuals can protect themselves from the potential negative effects of certain ingredients while still enjoying the benefits of sun protection.