Welcome back to How To Medicate and welcome to this video where we will cover everything you need to know about sunscreens. This video is part of a video series on your skin. We will cover all kinds of skin related problems and drugs. So for more skin related videos check out this playlist:
   • Everything on a healthy skin.  

Why should you use sunscreen?
This is necessary because the sun can be harmful, especially it’s ultraviolet rays. Ultraviolet rays consists out of wave of different wavelengths. Two important types are UVA and UVB rays.

- UVB only reaches the superficial levels of our skin. Too much exposure to UVB can cause a sunburn. The intensity of UVB rays increases during summertime, explaining why we commonly experience sunburns in the summer.

- UVA rays goes much deeper into our skin. Therefore they can cause damage to the DNA of our skin cells, leading to uncontrolled growth of some of these cells and ultimately to skin cancer. UVA rays also leads to an accelerated ageing of the skin. It lowering the elasticity of the skin and makes it saggy. The intensity of UVA rays remain constant throughout the year.

Physical vs. Chemical blockers.
Chemical blockers absorb the suns rays. The upsides: they are easy to apply, transparent and cheap. The downsides: they can cause irritations of the skin and it takes 15 minutes before they become active.
Physical blockers reflect UVB as a physical barrier. This is done with zinc or titanium. The upside: they cause less irritation of the skin, they work immediately and they have a higher UVA protection.
The downsides: they can leave highly visible marks and they are more expensive.

Does SPF matter?
SPF stand for sun protection factor. Which is a measure of the protection against UVB-rays the sunscreen gives you. It practically tells you how well you are protected against a sunburn. SPF does not measure UVA protection.

Best practises:
- Use a sunscreen with a SPF-grade of at least 30 and protection against UVA.
- Use 5 grams of sunscreen and apply it on all the parts exposed to the sun.
- Apply it 15-20 minutes before you go outside and re-apply it every 2-3 hours, re-apply it after swimming or after sweating a lot.
- You can also wear protective clothing with an ultraviolet protection factor: UPF.
- It is important to stay a much as possible in shaded area’s
- Avoid the sun at peak hours: 10am to 4pm.
- Children younger than 6 months should have almost no exposed to bright sunlight.

- Disclaimer: this video and the comments are meant purely informational! This is not medical advice! If you are looking for medical advice always contact your own doctor. -

Literature:
1: Latha M.S. et all. (2013). Sunscreening Agents. J Clin Aesthet Dermatol. 2013 Jan; 6(1): 16–26.
2: Levy S.B. (2018). Sunscreens and Photoprotection. Medscape.
3: Dr Davin Lin (2018). How to choose SUNSCREENS.
4: Ted-Ed (2013). Why do we have to wear sunscreen? - Kevin P. Boyd.

* The images in this video are used for educational purposes only. Most of the images and video material in this video come from https://www.canva.com/.

Music:
1. Atch. This Feeling. Music promoted by Vlog No Copyright Music.
2. Ikson, New Day, Music promoted by Vlog No Copyright Music.

Follow me on instagram: @HowtoMedicate
Follow me on twitter: @HowtoMedicate

Books I used In Medical School:
Lehninger Principles of Biochemistry Seventh Edition, https://amzn.to/2PFGidh
Guyton and Hall Textbook of Medical Physiology 14th Edition, https://amzn.to/3inL6jM
Human Anatomy & Physiology (12th Edition), https://amzn.to/2DHlHCT
Oxford Handbook of Clinical Specialties, https://amzn.to/3fU854s
Oxford Handbook of Emergency Medicine, https://amzn.to/31LfMVg
Oxford Handbook of Clinical Medicine, https://amzn.to/3ky73hZ
Janeway's Immunobiology, https://amzn.to/3gLZW3e
Atlas of Human Anatomy (Netter Basic Science), https://amzn.to/3afFe9c
Netter's Anatomy Flash Cards, https://amzn.to/2XSAMIN
The House of God, S. Shem, https://amzn.to/31I7HAU

Gear I use:
Camera: Canon EOS M50: https://amzn.to/33SNMSn
Microphone: Boya Lavalier Microphone: https://amzn.to/3aggLkc
Microphone: Rode VideoMicPro: https://amzn.to/3amCmrh
Computer: Apple Macbook Pro: https://amzn.to/33PDEtu