How Much Sun Is Too Much Sun When It Comes to Skin Cancer?
At this time of the year, if you want to be outdoors, it is pretty hard to avoid sun exposure, and who doesn’t want to be outside enjoying the bright sun during the precious summer months in Ontario?
Whether it is sitting by a pool, hiking, biking, camping, visiting a cottage or playing on the beach, there is so much fun to be had in the sun! But does the threat of skin cancer have you wondering how much time you should be enjoying in the sun?
What’s the answer?
It isn’t an easy answer. Sun exposure is necessary each and every day to allow for optimal Vitamin D levels. If we do suffer skin damage from a sun burn, we need Vitamin D to aid in skin repair. Skin that doesn’t fully repair itself can open up the potential for skin cancer in the future. Over exposure to both UVA and UVB rays can promote skin cancer so caution does need to be taken.
What about sunscreen?
Many sunscreens contain carcinogenic ingredients so lathering yourself up with sunscreen everyday isn’t the answer either. When purchasing sunscreen, get to know your ingredients as some sunscreens are definitely better for you, as well as the environment, than others. It is also important to note whether your sunscreen protects you from both UVA and UVB sun rays. If you are out when UV rays are high or for long periods, you will need sunscreen to avoid a burn but you may want to also look at alternative ways to avoid too much sun exposure. When it comes to Vitamin D from the sun, sunscreen blocks UVB rays which initiates Vitamin D synthesis so overuse could lead to Vitamin D deficiency.
Have I got you confused on how much time we should be out in the sun?
Remember sun exposure is good, your body needs it and it will make you feel good. But also remember too much sun and sun burns can be harmful with long-lasting effects. Ever visit the beach first thing in the morning or closer to suppertime? Maybe not always ideal but these are great times to spend lots of time by the water without the threat of a sunburn, while getting enough sun exposure to keep your Vitamin D levels up. I personally find it a nice, peaceful time of the day to take in and enjoy your surroundings.
Want to be out and about in the sun during the middle of the day?
Those are the times you do need sunscreen and having some type of shelter to get a break from the sun is important as well. If possible take breaks from the heat and sun to give your body and skin a break from harmful UV rays. Consider the use of wide brimmed hats and SPF clothing/ bathing suits for protection without the added chemicals of sunscreen.
Final Thoughts:
We need daily sun exposure but try to avoid long periods of time in the sun when UV rays are high and avoid sunburns as these can set you up for problems down the road. Having fun in the sun and getting out to exercise or work in your garden etc. is so good for your physical and mental well being. Just remember to choose the right time of the day and/or clothes to hats to help with sun protection. When it comes to strong UV rays, less is more!
I can’t finish this blog without mentioning nutrition! A good summer beverage for skin protection: Green Tea – drink it hot or cold, and consider adding ginger for extra skin nourishment. Also a daily dose of fish oil, especially cod liver oil is great for the skin and a source of Vitamin D.
If you have any concerns about cancer/ cancer prevention consider booking an appointment with Tammy today to discuss how she can help with cancer prevention or walk alongside you or a loved one with a cancer diagnosis.
References:
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Journal of Oncology Pharmacy Practice. 2025;0(0). doi:10.1177/10781552251327596
- Sander M, Sander M, Burbidge T, Beecker J. The efficacy and safety of sunscreen use for
the prevention of skin cancer. CMAJ. 2020;192(50):E1802-E1808. doi:10.1503/cmaj.201085
- Santander Ballestín S, Luesma Bartolomé MJ. Toxicity of Different Chemical Components in
Sun Cream Filters and Their Impact on Human Health: A Review. Applied Sciences. 2023;
13(2):712. https://doi.org/10.3390/app13020712
- Kumar Pal V, Lee S, Kannan K. Occurrence of and dermal exposure to benzene, toluene
and styrene in sunscreen products marketed in the United States. Science of The Total
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- Uçar N, Holick MF. Illuminating the Connection: Cutaneous Vitamin D3 Synthesis and Its Role
in Skin Cancer Prevention. Nutrients. 2025; 17(3):386. https://doi.org/10.3390/nu17030386
- Katiyar SK. Green tea prevents non-melanoma skin cancer by enhancing DNA repair. Arch
Biochem Biophys. 2011;508(2):152-158. doi:10.1016/j.abb.2010.11.015
- Ozkur M, Benlier N, Takan I, et al. Ginger for Healthy Ageing: A Systematic Review on
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Cell Longev. 2022;2022:4748447. Published 2022 May 9. doi:10.1155/2022/4748447







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