FAQ About Sunscreen

Physical and chemical sunscreens differ in their active ingredients and how they protect the skin from the sun's harmful UV radiation. Here are the key differences between the two types:

Physical (Mineral) Sunscreens:

• Active Ingredients: Physical sunscreens contain mineral-based active ingredients, such as zinc oxide and titanium dioxide.
• Mechanism of Action: When applied to the skin, these mineral particles form a protective barrier that sits on the skin's surface. They work by reflecting and scattering UV radiation away from the skin, preventing it from penetrating and causing damage.
• Protection Time: Physical sunscreens provide immediate protection upon application. There is no waiting period before they become effective.
• Broad-Spectrum Protection: Physical sunscreens offer broad-spectrum protection, safeguarding the skin against both UVA and UVB rays.
• Gentle on the Skin: They are generally considered gentle and suitable for sensitive skin types since they are less likely to cause skin irritation or allergic reactions.
• Reef-Friendly: Mineral-based active ingredients are generally considered reef-safe, as they are less likely to harm marine ecosystems.

Chemical Sunscreens:

• Active Ingredients: Chemical sunscreens contain organic compounds, such as avobenzone, octinoxate, oxybenzone, and others.
• Mechanism of Action: These chemical compounds work by absorbing UV radiation when applied to the skin. They convert the absorbed UV rays into less harmful energy, such as heat, before they can cause damage.
• Protection Time: Some chemical sunscreens may require around 20-30 minutes to become effective after application. This waiting period is known as the "activation time."
• Broad-Spectrum Protection: Many chemical sunscreens also provide broad-spectrum protection against both UVA and UVB rays.
• Lightweight and Transparent: Chemical sunscreens tend to be lighter in texture and often leave no visible residue on the skin, making them popular for daily use.
• Potential for Irritation: Some individuals may experience skin irritation or allergic reactions to certain chemical sunscreen ingredients like oxybenzone. However, many modern formulations have minimized this concern.