Sunscreen from Scratch: SPF Myths Debunked

Sunscreen is the unsung hero of any skincare routine, yet it’s often misunderstood and underused. SPF myths, concerns about its safety and misinformation often prevent people from using this vital product effectively. The truth? Sunscreen is one of the most important tools for protecting your skin from UV damage, premature aging, and even skin cancer. In this blog, we’ll bust common sunscreen myths, explain how to apply it correctly and highlight the best sunscreens from trusted brands to keep you protected.

Why Sunscreen is Essential

Sunscreen acts as a shield, protecting your skin from harmful UVA and UVB rays. UVA rays penetrate deep into the skin, causing damage to your skin cells, underlying structure like collagen and elastin which not only increases the visible signs of aging but causes long term damage to the skin. UVB rays are the primary cause of sunburn and are largely responsible for causing genetic damage resulting in skin cancer although both UVA and UVB contribute to skin cancer. Sunscreen not only reduces these risks but also preserves your skin’s youthful appearance by preventing dark spots, wrinkles, and collagen breakdown.
However, myths about sunscreen’s effectiveness and safety continue to circulate, leading many to question whether they should use it at all. Let’s set the record straight.

Debunking Common SPF Myths

Myth 1: Sunscreen is Toxic

One of the most persistent myths is that sunscreen ingredients are harmful or toxic. Here’s the truth: the majority of sunscreens on the market are extensively tested for safety and efficacy.

Chemical Sunscreens:

These contain UV filters like avobenzone, oxybenzone, or octocrylene, which absorb UV radiation and convert it to heat. While some concerns exist about their absorption into the bloodstream, studies, including the FDA’s 2019 research, emphasise that these levels are not harmful to human health.

Mineral Sunscreens:

Containing zinc oxide or titanium dioxide, these sit on the skin’s surface and reflect UV rays. They’re generally recognized as safe and ideal for sensitive skin.

Verdict:

Both types of sunscreen are safe for use, with mineral sunscreens offering a good alternative for those seeking "cleaner beauty" products.

Myth 2: Darker Skin Tones Don’t Need Sunscreen

While melanin provides some natural protection, it’s not enough to prevent skin damage or cancer. People with darker skin tones are still at risk of hyperpigmentation and skin cancer, making daily sunscreen application essential.

Myth 3: SPF in Makeup is Enough

SPF-infused makeup is a nice bonus but rarely provides enough coverage. To get the advertised SPF protection, you’d need to apply a much thicker layer of makeup than is realistic. Always layer a dedicated sunscreen underneath your makeup.

Myth 4: Higher SPF Means You Don’t Need to Reapply

Many people believe that using a higher SPF (like SPF 50+ or 100) means they can apply sunscreen once and stay protected all day. While higher SPF provides more protection against UVB rays, it doesn’t last longer on the skin.
Fact: SPF measures the percentage of UVB rays blocked, but the duration of protection remains the same. Reapplication every 2-4 hours is essential.

Myth 5: Sunscreen Causes Vitamin D Deficiency

Some worry that sunscreen blocks vitamin D production. While sunscreen theoretically can reduce the skin's ability to produce vitamin D, many studies have shown that the decrease is minimal, if at all than those who wore no sunscreen at all. Incidental sun exposure is usually sufficient to maintain healthy levels.
Fact: Dietary sources of vitamin D and incidental sunlight exposure to UVB provide enough vitamin D for most people. Protecting your skin from UV damage should remain a priority.

Myth 6: You Don’t Need Sunscreen Indoors

UVA rays can penetrate glass, exposing your skin to damage even when indoors or in a car. Additionally, the man-made world contains highly reflective surfaces: metals, glass even natural surfaces like water, sand and snow cause indirect UV exposure.

Fact: If you’re near windows or working under blue-light-emitting devices, sunscreen is still a smart move.

Myth 7: Sunscreen Isn’t Necessary on Cloudy Days

Up to 80% of UV rays can penetrate clouds, meaning your skin is still exposed to harmful radiation even on overcast days.
Fact: Sunscreen is just as important on cloudy days as it is on sunny ones. Make it a daily habit, rain or shine.

Myth 8: Sunscreen Causes Acne

Some think sunscreen clogs pores and causes breakouts. While heavy formulas may exacerbate acne in some people, plenty of non-comedogenic sunscreens are designed for breakout-prone skin.

Fact: Opt for oil-free or gel-based sunscreens.

La Roche-Posay Anthelios Invisible Fluid SPF 50+ or Avocado Zinc Natural Tinted Zinc SPF 30+, both offers sun protection while soothing sensitive or acne-prone skin.

Myth 9: Waterproof Sunscreen Doesn’t Need Reapplication

Waterproof sunscreen is water-resistant, not waterproof. Its effectiveness diminishes after 40-80 minutes of water exposure.

Fact: Always reapply sunscreen after swimming, sweating, or towel drying.

Myth 10: Sunscreen is Only for the Beach

Sunscreen is essential every day—not just for outdoor activities like hiking or beach trips. UV exposure happens during daily activities like walking or driving.
Fact: Incorporate sunscreen into your everyday routine to prevent cumulative sun damage.

How to Apply Sunscreen Correctly

Applying sunscreen correctly is crucial for it to work effectively:

Amount to Apply:

Face and neck: 1/3 to 1/2 teaspoon.
Body: About 1 ounce (a shot glass).

When to Apply:

30 minutes before sun exposure.
Reapply every 2 hours, or immediately after swimming or sweating.

Don’t Forget These Areas:

Ears, back of the neck, hands, and feet.

Our Top Sunscreen Recommendations

Face Sunscreens: 

La Roche-Posay Anthelios Invisible Fluid SPF 50+ –

Lightweight and comfortable for everyday wear.

Aspect Sun Hydrating Face SPF 50+ - 

 Hydrating and ideal for daily use.

Avocado Zinc Natural Tinted Zinc SPF 30+ –

A soothing, non-greasy mineral sunscreen with a light tint for daily use.

Body Sunscreens

We Are Feel Good Inc. Coconut Sunscreen Lotion SPF 50+ –

 A nourishing and water-resistant sunscreen that smells like summer.

ASAP SPF50+ Hydrating Defence – 

Offers broad-spectrum protection with skin-nourishing benefits.

Pure Fiji Coconut Sunscreen SPF 30 –

A tropical, hydrating sunscreen enriched with natural oils.

Don’t Skip Sunscreen

Sunscreen is one of the most effective tools for protecting your skin from UV damage and maintaining its youthful glow. By debunking myths, applying it correctly, and choosing high-quality products, you can enjoy both peace of mind and radiant skin.
With options from trusted brands like La Roche-Posay, Aspect, Avocado Zinc, and We Are Feel Good Inc., incorporating sunscreen into your routine has never been easier. Commit to daily use and enjoy the long-term benefits of healthy, glowing skin.
Start today—your future self (and skin) will thank you!