Which sunscreen should we choose?

1. SPF (Sun Protection Factor): The SPF value indicates the protection level of the sunscreen against sunburn. The higher the SPF value, the more protection it provides against sunburn. In general, at least SPF 30 is recommended, but a higher value is recommended if you spend a long time in strong sunlight or if your skin is particularly sensitive.
   
2. UV-A protection: It is important that the selected sunscreen protects not only UV-B rays, but also UV-A rays. UV-A rays contribute to the aging of the skin and its long-term harmful effects. Look for "broad spectrum" or "UV-A/UV-B protection" on sunscreens.
3. Skin type: It is important to consider your own skin type. The type of skin can influence the choice of sunscreen milk. For example, fair skinned people generally require stronger protection, while darker skinned people may need a lower SPF.
4. Texture and comfort: The texture and comfort of the sunscreen can also be a consideration. Various textures and formulas are available, such as creams, sprays, gels or light oils. Find the formula that suits you best and identify the convenient use.
5. Sensitivity and allergies: If you suffer from any skin problems, sensitivity or allergies, you should choose hypoallergenic or sunscreens developed for sensitive skin. These generally contain fewer irritants.
6. Water resistance: If you are going to swim or sweat, you should choose a sunscreen that is waterproof or sweat resistant. These products hold protection better in water or when sweating.
7. Ingredients: If you're paying attention to ingredients, choose products that don't contain harsh chemicals or irritants. We distinguish between two component types:

• Chemical sunscreen milks:
  
  Principle of operation: The active ingredients from the chemical sunscreen milk are absorbed through the skin, then absorb the sunlight through a chemical reaction in the skin, and are then released in a harmless form.
  Advantages:
  - Better protection against UV-A (longer wavelength) rays: Chemical ingredients are generally more effective at protecting against UV-A rays, which contribute to skin aging and damage.
  - Easy to Disperse: They can be easily distributed on the skin, which can result in easier use.

Disadvantages:
- Sensitivities and Allergies: Some people may be sensitive to chemical ingredients, which may cause allergic reactions.
- Potential Harms: Some of the chemical ingredients in sunscreens can be potentially harmful, and some are questionable in terms of their impact on the environment.

• Physical sunscreen milks:

How it works: The active ingredients from the physical sun protection milk stay on the skin and form a physical barrier to sunlight when applied to the skin. Physical sunscreens are mainly of two types: zinc oxide and titanium dioxide.
Advantages:
- Immediate effect: Because physical sunscreens remain on the skin, they are immediately effective in absorbing and reflecting sunlight.
- Fewer allergic reactions: Physical sunscreens are less likely to cause allergic reactions because they are not absorbed into the skin.
Disadvantages:
- White film: Some people do not like the use of physical sunscreens because they leave a white film on the skin, which can be aesthetically unappealing.
- Less UV-A protection: Physical sunscreens are generally less effective at protecting against UV-A rays.

It is important to follow the instructions when using the sunscreen and to regularly reapply the sunscreen while sunbathing. Also, keep in mind to avoid sunlight during the most intense hours (usually between 10 am and 4 pm).