Reason to use sunscreen every day. In reaction to UV rays, certain chemicals and drugs can make your skin more sensitive to the sun, causing inflammation in the form of sunburn, an eczema-like reaction, or hives. This interaction is known as photosensitivity. The reaction may be an allergic reaction or a direct toxic effect.

Recommended Sunscreens, Use sunscreen every day

With a photo-allergic reaction, UV exposure changes the structure of the drug so that the immune system sees the drug as an invader or antigen. The immune system initiates an allergic response that causes inflammation of the skin in the sun-exposed areas. A photo-allergic response resembles eczema, and the reaction is long lasting. In a photo-toxic reaction, the drug is activated by sun exposure and causes skin damage. The reaction looks like a bad sunburn.
If you are taking any of the drugs or using products with photosensitive ingredients from the following list, stay out of the sun or be very careful of sun exposure.

Allergic Reactions

Fragrances found in personal grooming items and cosmetics
Sunscreens with PABA
Industrial cleaners that contain salicylanilide
Sunscreen that contains zinc or titanium can prevent photosensitivity.

There is a broad array of sun protection products currently on the market, and that is a good thing. But with all these new products come hype and confusion, and when it comes to protecting your skin, you need the facts. Do not be fooled by the claim that a sunscreen will give you “all day protection.” To start, SPF stands for “sun protection factor” and refers to how long you can stay out in the sun without burning.

This number is calculated by comparing the time needed for a person to burn unprotected with how long it takes for that person to burn wearing sunscreen.

SPF sunscreens help to protect the skin from short-wave UVB rays, not long-wave UVA rays. It is important to use full-spectrum sunscreen that will protect your skin from both long-wave UVAs and short-wave UVBs. As you will recall, UVBs are the rays that cause sunburn, and UVAs are those that cause sun damage.

SPF is meant to indicate the maximum sun exposure time the sunscreen will allow without burning. So if you typically burn in 10 minutes without protection, wearing an SPF of 15, you would theoretically be able to stay in the sun for 150 minutes without burning. The SPF number is not an exact measure by any means. The effectiveness of sunscreen depends on your skin tone, how much sunscreen you apply, the time of day you are exposed to the sun’s rays, and your activities.

It might be logical to think that an SPF of 30 is twice as good as an SPF of 15, but that is not how it works. An SPF 15 product blocks about 94 percent of UVB rays, SPF 30 blocks 97 percent, and an SPF 45 product blocks 98 percent. Sunscreens with higher SPF ratings block slightly more UVB rays, but none offer 100 percent protection. SPFs used to top out at 30, but the race is on among sunscreen makers to create stratospheric SPFs. Do not let extremely high SPF numbers lull you into a false sense of security.

The difference between an SPF 100 and an SPF 30 is marginal. When it comes to preventing signs of aging, you have to be hypervigilant about protecting your skin from the sun.

Recommending some products that combine sunscreen with moisturizer.

Luxury:
Lancer Skincare Sheer Fluid Sun Shield SPF 30
Chanel UV Essentiel SPF 30
AmorePacific Natural Protector SPF 30/PA+++
La Prairie Advanced Marine Biology Day Cream SPF 20
Erno Laszlo Firmarine Moisturizer SPF 30
Jurlique Sun Lotion SPF 30+
Aesop Sage & Zinc Facial Hydrating Cream SPF 15

Moderate:
Dermalogica Daily Defense Block SPF 15
Elizabeth Arden Ceramide Premiere Activation Cream SPF 30
Estée Lauder DayWear Advanced Multi-Protection Anti-Oxidant & UV Defense SPF 50
Clarins Bright Plus HP Brightening Hydrating Day Lotion SPF 20
Clarins Sun Control Stick For Sun-Sensitive Areas SPF 30
Clinique City Block Sheer Oil-Free Daily Face Protector Broad Spectrum SPF 25

Affordable:
Neutrogena Clear Face Liquid-Lotion Sunscreen Broad Spectrum SPF 30
La Roche-Posay Anthelios 45 Ultra Light Fluid for Face
L’Oréal Paris Sublime Sun Advanced Sunscreen Liquid Silk Lotion SPF 30
Aveeno Positively Radiant Daily Moisturizer Broad Spectrum SPF 30
Cetaphil Daily Facial Moisturizer With Sunscreen Broad Spectrum SPF 15

Erno Laszlo Firming Cream Review