The Ultimate Sunscreen Cheat Sheet: Expert Insights from Dr. Lisa Kellett

With the summer sun at its peak, it’s time to rethink your daily SPF routine. Zoomer recently published an essential modern guide to sun protection, featuring invaluable advice from DLK’s own Dr. Lisa Kellett, a leading authority in medical and cosmetic dermatology.

If you think a quick splash of sunscreen on your face is enough, Dr. Kellett’s insights might just change how you protect your skin forever. Here is what you need to know to stay sun-safe, smart, and radiant this season.

The Game-Changing New Filter: Bemotrizinol (BEMT)

There’s a massive buzz in the skincare world about Bemotrizinol (BEMT), a next-generation broad-spectrum chemical UV filter. While it has been widely used in Europe and Australia, Health Canada recently expanded its approval to a “Secondary Sunscreen Monograph,” meaning you will now see it popping up in everyday cosmetic products like moisturizers, foundations, and lip balms.

Unlike traditional mineral blockers, BEMT offers stellar protection against both UVA and UVB rays without leaving behind that dreaded, ghostly white cast.

Dr. Kellett’s Take: “I think it's a great ingredient. Anything that is easier and more pleasant to use means that people will wear their sunscreen.” She notes that making SPF wearable is crucial, especially since a recent study showed that 50% of Canadians still don't realize UV radiation is directly linked to skin cancer.

The Danger Zones: Spots We Always Miss

When applying sunscreen, most of us focus entirely on our faces. However, Dr. Kellett warns that skin cancer frequently develops in the areas we neglect:

• For Men: The tips of the ears and the back of the neck are the most common spots for basal cell carcinoma, often because baseball hats leave them exposed.
• For Women: The calves are a major trouble zone, as many forget to apply block to the back of their legs when wearing shorts or skirts.

Working Indoors? You Aren't Safe From UV Rays

Think you can skip the SPF on days you’re sitting inside the office or driving? Think again. Dr. Kellett reminds us that harmful UVA radiation easily penetrates window glass and car windows.

“If you're inside working next to a window, you are exposing yourself to eight hours of radiation every day,” warns Dr. Kellett.

Dr. Kellett’s Quick Sunscreen Cheat Sheet

To ensure you are actually protected, follow these quick rules of thumb:

• The Minimum: Look for an SPF 30 or higher. (Dermatologists often recommend SPF 50 because most people don’t apply enough product in real life).
• The Blueprint: Check your bottle for a DIN (Drug Identification Number) or NPN (Natural Product Number) to guarantee it has been officially vetted and approved by Health Canada.
• The Golden Ratio: Use 1/4 teaspoon for your face, 1/2 teaspoon for your face and neck combined, and a full shot glass for your body.

The Mineral vs. Chemical Breakdown

The guide also cuts through the noise of the physical vs. chemical sunscreen debate:

• Mineral (Physical): Acts like a shield, reflecting UV rays. Great for sensitive skin or conditions like rosacea, but can feel heavier on the skin.
• Chemical (Organic): Absorbs UV radiation and converts it into harmless heat. They are much lighter and transparent, making them ideal for layering under makeup (just remember they take 15 minutes to kick in). Tip: The article highly recommends Dr. Kellett’s own Clear Clinical SPF 30 Spray for an un-clogged, waterproof formula that’s easy to reapply on the go.

Want to find the perfect SPF product for your skin type or learn how to block screen-induced blue light? Read the full article and checklist on Zoomer: Your Sunscreen Cheat Sheet on Zoomer.com 

For a customized approach to your sun protection needs, you can book a consultation with our team to explore your options.

This article has been edited and condensed for clarity. 

Source: https://zoomer.com/the-zoomerist-home/2026/06/19/your-sunscreen-cheat-sheet