Sunscreen is a non-negotiable for protecting against premature ageing and skin cancer. However certain chemical UV filters commonly found in conventional sunscreens may be absorbed through the skin and enter the bloodstream.
For most people, occasional use is unlikely to cause harm. But for those with hormonal imbalances, sensitive digestion, or chronic health symptoms, cumulative exposure may be worth considering.
How Could Sunscreen Affect Hormones or Digestion?
Some sunscreen ingredients are known as ‘endocrine disruptors’ meaning they can structurally mimic or may interfere with hormone signalling in the body. This may in some people potentially disrupt oestrogen balance, affect the thyroid function and overall increase our toxic load which our liver must then process to clear.
From a digestive perspective, the connection is often indirect. Our Livers play a key role in both detoxification (including the detoxification of our hormones) and digestion. When it is under increased load, some individuals may experience symptoms such as bloating, sluggish digestion, hormonal symptoms such as PMS and irregular menstrual cycles).
Symptoms to be Aware of
While not solely caused by sunscreen, the following symptoms may signal sensitivity to environmental chemicals:
Hormonal fluctuations or worsening PMS or Peri-Menopausal symptoms
- Persistent bloating or digestive discomfort
- Fatigue
- Headaches
- Skin irritation or breakouts
Ingredients to be Mindful of
If you are concerned that you are sensitive, when choosing sunscreen, consider limiting exposure to the following chemicals. These are widely used chemical filters which may have potentially endocrine disrupting properties.
- Oxybenzone (Benzophenone-3)
- Octinoxate (Ethylhexyl methoxycinnamate)
- Octocrylene
- Homosalate
What to Choose Instead
Look for mineral sunscreens which sit on the skin rather than being absorbed. Key ingredients to look for are zinc oxide and titanium dioxide as these are generally tolerated and less likely to interfere with hormones.
Also consider fragrance free as these are likely to contain less chemicals.
Overall we know sunscreen is part of our summer routine, but ingredient awareness empowers you to make the choices that support both your skin and your intestinal health. What ever product you use, apply it along with supporting habits like staying hydrated and eating antioxidant rich foods.