When it comes to protecting your skin from premature ageing, pigmentation, and long-term damage, sunscreen is your absolute must have. But not all sunscreens are created equal and choosing the right kind can make a dramatic difference in your skin’s health and appearance. At My Oh My Aesthetics, we advocate for mineral-based sunscreens, particularly zinc oxide formulations, over chemical alternatives and here’s why.
Understanding UV Rays: UVA vs UVB
Before diving into sunscreen types, let’s break down why SPF is essential and what we’re actually protecting against.
UVB Rays – these are the rays that cause sunburn and are strongest during the middle of the day. They damage the outer layers of the skin and play a key role in the development of skin cancer. Think UVB is the “B for Burn.”
UVA Rays – penetrate deeper into the skin, reaching the dermis – the layer where collagen, elastin, and DNA live. These rays are the main contributors to premature ageing, pigmentation, collagen breakdown, and long-term skin damage.
Unlike UVB, UVA rays are present from the moment the sun rises until it sets, and their intensity remains relatively constant throughout the entire day – not just at midday. They can even penetrate through clouds and glass, meaning you’re still exposed indoors, in your car, or on gloomy days. You won’t feel them burning your skin, but they’re silently causing oxidative stress and accelerating the ageing process. Think of UVA as the “A for Ageing.”
Why SPF Alone Isn’t Enough
SPF (Sun Protection Factor) mostly measures protection against UVB rays, but not necessarily UVA. Many conventional sunscreens offer minimal UVA protection, which means your skin might still be absorbing deep, aging damage – even if you’re not getting sunburnt. That’s where the type of sunscreen matters most. Let’s compare the two:
Mineral (Physical) Sunscreen vs Chemical Sunscreen
| Mineral (Physical) | Chemical | |
| Main Ingredients | Zinc oxide, titanium dioxide | Oxybenzone, avobenzone, octinoxate, etc. |
| How it works | Sits on top of the skin & reflects UV rays | Absorbs into the skin and converts UV rays to heat |
| UVA Protection | Broad spectrum, including superior UVA defense | Variable; often limited UVA protection |
| Onset | Works immediately upon application | Takes ~20 minutes to activate |
| Skin sensitivity | Calmer, less irritating, safer for sensitive skin | May trigger irritation or allergic reactions |
Why Zinc Sunscreen Is Superior – Especially for UVA Protection
Zinc oxide is the gold standard for broad-spectrum sun protection. It’s a naturally occurring mineral that provides a physical barrier, reflecting both UVA and UVB rays away from the skin. Unlike chemical sunscreens, zinc doesn’t need time to activate and doesn’t break down as easily in sunlight. It’s especially ideal for:
• Sensitive or acne-prone skin
• Post-treatment skin (e.g. after microneedling, skin needling, or peels)
• Daily use, including under makeup
• Those looking to reduce pigmentation or prevent premature ageing
What About White Cast?
One common concern with zinc sunscreens is the white cast they can leave behind. However, newer formulations (like MOTHER Mousse SPF 50+) blend beautifully into the skin while still offering full-spectrum protection without compromising on safety or effectiveness.
Your Best Anti-Ageing Product? Daily SPF with Zinc
If you’re investing in skin treatments like skin needling, LED therapy, peels or SQT Bio Microneedling, but skipping SPF, you’re undoing all that hard work. Using a zinc-based SPF daily, not just on sunny days, is one of the most effective ways to preserve your skin’s health, slow visible ageing, and protect your results from professional treatments.
We stock and recommend zinc-based SPF products that are:
• Broad spectrum
• Lightweight and breathable
• Non-comedogenic
• Ideal for everyday wear
This includes the MOTHER SPF range and Synergie’s Uberzinc duo. Feel free to ask during your next appointment which sunscreen is best suited to your skin and treatment plan.
Final Thoughts
Your skin is your lifelong investment and sunscreen is your most important skin-care product. Opt for a physical, zinc-based sunscreen to shield against both UVA and UVB rays, reduce the risk of pigmentation and ageing, and keep your skin strong, protected, and glowing. Want help choosing the right SPF or incorporating it into your skincare routine? Book a consultation or visit us at My Oh My Aesthetics, we’re here to help your skin thrive.
