Is Slathering on Sunscreen Really as Good as We Think?

29 September, 2024

1. Layering on Sunscreen Doesn’t Mean More Protection

Applying too much sunscreen can lead to adverse reactions on the skin.

2. Standard Dosage for Each Type of Sunscreen

Dosage for Cream-based Sunscreens

The standard dosage for sunscreen is 2 milligrams of cream per square centimeter of skin, as recommended by dermatologists. For the face, this typically translates to 1-2 grams, while the whole body requires approximately 25-30 grams. This amount should also be applied to the ears, neck, and philtrum for an even skin tone.

An easier way to estimate the right amount of sunscreen is by using a measuring spoon. For the face, 1/3 to 1/4 of a teaspoon (approximately 1-2 grams) is sufficient. For the whole body, a small shot glass worth of sunscreen (about 25-30 grams) will do the trick. Alternatively, you can squeeze out enough sunscreen to cover the three finger joints of your index finger for full-body application.

The standard dosage is 2 milligrams of sunscreen per square centimeter of skin.

Dosage for Spray-on Sunscreens

For spray-on sunscreens, the standard dosage is achieved by spraying and reapplying four times to create four layers of protection on the skin.

Spray sunscreen evenly and thoroughly across all areas of the body.

3. Harmful Effects of Using Sunscreen Incorrectly

Applying too little or too much sunscreen can have detrimental effects on the skin. Insufficient sunscreen reduces its protective barrier, leading to premature aging, wrinkles, and dark spots. On the other hand, excessive sunscreen creates a thick layer that clogs pores, resulting in acne, enlarged pores, oily skin, and a dull complexion. Therefore, it’s crucial to use the correct amount of sunscreen to avoid these issues.

Using too little sunscreen can lead to wrinkles and dark spots.

4. How Many Times a Day Should You Apply Sunscreen?

Dermatologists recommend applying sunscreen daily, regardless of the weather, as harmful UV rays can penetrate through windows and glass. When exposed to sunlight for extended periods, reapplication is necessary as the effectiveness of sunscreen diminishes over time.

For those working indoors in an air-conditioned environment, once-daily application is sufficient, although reapplication at noon after prolonged screen time is advised. However, for individuals working or engaging in outdoor activities, reapplication every 3-4 hours is ideal, ensuring a clean face before each application for better absorption.

Adjust your sunscreen usage according to your specific work environment.

5. Important Notes on Sunscreen Usage

It is recommended to apply sunscreen at least 20 minutes before going outdoors to allow the protective layer to absorb into the skin. Sunscreen should be the last step in your skincare routine and the first step before makeup. Always start with a clean face, using a gentle cleanser, and allow it to dry before application. For extended outdoor activities, opt for a waterproof formula with a higher SPF to ensure maximum protection.

Proper sunscreen usage is an effective way to combat aging.

Additionally, always purchase sunscreen from reputable sources to ensure its authenticity and safety. Take the time to research different sunscreen products and their proper usage to maintain healthy and beautiful skin.