What Kind of Sunscreen is Best? Mineral VS. Chemical

by Deborah Maragopoulos FNP | Apr 27, 2023 | Mind/Body, Men's Health, Women's Health | 1 comment

What kind of sunscreen is the best — mineral or chemical? Let’s talk about it.

Overexposure to the sun can induce premature aging and skin cancer. So it’s important to protect your skin. Wearing sun-protective clothing is best but if your skin is bare, you may need sunscreen.

Broad-spectrum sunscreen protects against UVA and UVB rays to reduce the risk of both non-melanoma and melanoma skin cancers.

Mineral sunscreens act as a physical barrier that shields your skin from harmful UV rays.

Chemical sunscreens sink into the skin and act like a sponge soaking up harmful UV rays.

Mineral sunscreens use zinc oxide or titanium oxide to shield your skin. Both are deemed safe and effective by the FDA. Zinc oxide is considered safe for people with skin sensitivities and for young children. They are also safe for sea life.

Mineral sunscreens can be chalky, leaving a white cast on your skin and can be difficult to rub in. Mineral sunscreens need to be reapplied frequently.

Unlike mineral sunscreens, chemical sunscreens do not leave a film on your skin. But the heat that is generated by the active ingredients’ absorption of UV rays can cause sensitivity reactions in some people.

Unfortunately, chemical sunscreens UV filters are absorbed systemically even after one application. These active ingredients pass through the skin, into the bloodstream, and are detectable for up to three weeks. Chemical sunscreen ingredients have been detected in breast milk.

Chemical sunscreens have been shown to cause endocrine disruption and neurotoxicity. The route appears to be via the hypothalamus as it is not protected by the blood-brain barrier and controls hormone production. Therefore, long-term use of chemical sunscreens can contribute to hypothalamus dysfunction.

Sunscreens can block the skin’s ability to convert sunlight into Vitamin D which is crucial in immune function and hormone receptor site activity.

In conclusion, while using sun protection is important to prevent aging and skin cancer – physical barriers like clothing and hats, swim shirts, and mineral sunscreens are a safer option than chemical sunscreens.

If you have any questions regarding sun protection, please join us in our Hormone Reboot Training.

Resources:

Neurotoxic effects of sunscreen

Frequently Asked Questions:

Can your hypothalamus cause weight gain?

Yes. The hypothalamus is the master regulator of metabolism, controlling how your body stores and burns energy through its signaling to the thyroid, adrenals, and pancreas. When the hypothalamus becomes dysregulated by chronic stress, poor sleep, inflammation, or blood sugar instability, it defends a higher weight "set point" — causing the body to hold onto fat regardless of diet or exercise. This makes hypothalamic dysfunction an upstream root cause of stubborn weight gain.

What is a weight set point and why won't mine move?

A weight set point is the body weight your hypothalamus works to defend, calibrated over time by stress, sleep, hormones, and inflammation. When you diet, the hypothalamus perceives scarcity and responds by slowing metabolism, increasing hunger hormones, and suppressing satiety signals to return you to that set point. This is why most people regain lost weight within two to five years of conventional dieting — the set point itself was never recalibrated, only temporarily overridden.

Why do I gain weight under stress even when I'm not eating more?

Chronic stress raises cortisol, which disrupts blood sugar regulation, promotes abdominal fat storage, and signals the hypothalamus that the body is under threat. In survival mode, the hypothalamus defends fat stores and slows metabolism — so weight can increase even without any change in calorie intake. The stress chemistry, not the food, is driving the weight gain, which is why stress reduction is essential to any lasting metabolic reset.

Why do I regain weight after stopping GLP-1 medications?

GLP-1 medications work peripherally on appetite and gastric signaling, but they do not address the underlying hypothalamic dysregulation that sets your defended weight. Because the hypothalamic set point is never recalibrated, the body resumes defending its original weight once the medication stops — leading to significant regain. Long-term success requires restoring hypothalamic regulation so the set point itself lowers, rather than relying on appetite suppression alone.

How long does it take to reset your metabolism?

Genuine metabolic recalibration takes a minimum of 90 days, because the hypothalamus needs consistent signals of safety and sufficiency before it will lower its defended set point. This differs from a diet, which produces temporary suppression the body quickly corrects. A 90-day reset typically moves through three phases: stabilizing stress chemistry (days 1–30), rebuilding metabolic efficiency (days 31–60), and lowering the weight set point (days 61–90).

Why does my thyroid feel slow even though my labs are "normal"?

Under chronic stress, the body converts thyroid hormone into reverse T3, which blocks active thyroid receptors and slows metabolism at the cellular level — even when standard lab values appear normal. This means you can experience genuine symptoms of slow metabolism, such as fatigue, cold intolerance, and brain fog, while your thyroid panel looks unremarkable. Addressing the upstream hypothalamic and stress signaling often improves thyroid conversion and symptoms.

Is stubborn weight gain a willpower problem?

No. Stubborn weight gain is a signaling problem, not a willpower problem. The hypothalamus governs weight through survival mechanisms that operate below conscious control — defending its set point by slowing metabolism and increasing hunger when it perceives threat. No amount of discipline can override this system; lasting change comes from restoring hypothalamic regulation through reduced stress, balanced blood sugar, restorative sleep, and targeted nutritional support.

About the Author - Deborah Maragopoulos FNP

Known as the Hormone Queen®️, I’ve made it my mission to help everyone - no matter their age - balance their hormones, and live the energy and joy their DNA and true destiny desires. See more about me my story here...