SPF full form is Sun Protection Factor (SPF), its value indicates how effective a product is at blocking UV rays when applied liberally to the skin. A product with a higher SPF protects the skin from more sun rays, but the level of protection does not increase linearly as the SPF value rises. The SPF rating technique determines how long your skin can be exposed to direct sunlight before it starts to burn (remember, sunburn is caused by UVB radiation). For example, an SPF 30 product will shield your skin from about 97 percent of UVB rays, while an SPF 50 product would protect you from 98 percent.

What is SPF?

SPF full form is Sun Protection Factor, on sunscreen is a relative measurement of how long the sunscreen will protect you from ultraviolet (UV) raysUVB rays typically affect the epidermis (outer layer of the skin). Sunburns and some skin malignancies on the surface are caused by them. UVA rays are emitted by the sun and can penetrate the dermis, the bottom layer of the skin. UVA photons are commonly linked to "tanning." The darker hue of the skin, on the other hand, indicates that cells in the dermis have been damaged. Although most SPF values pertain to UVB radiation, some sunscreens can also protect against UVA rays.

How does SPF work?

Protecting your skin with an SPF levels 30 or higher moisturizer, primer, or foundation (or layering all three for even more protection) is a must for wonderfully healthier, younger-looking skin.

SPF full form is Sun Protection Factor. If you generally get burned from the sun after 10 minutes of sun exposure, multiply that amount by the SPF number of the sunscreen you're planning to use. This will give you an estimate as to how long your sun protection will last.

If you apply sunscreen with an SPF of 30 and your skin turns colour after 10 minutes of unprotected sun exposure, you will get five hours of sun protection (10 minutes x 30 = 300 minutes, or 5 hours of protection). SPF 30 will give you 10 hours of protection if your skin changes colour after 20 minutes of sun exposure. However, this is only the case if you've used a lot of sunscreen. If you don't, the SPF degree of protection specified on the label will not be achieved.

The right amount of SPF for sunscreen

Examine the SPF number before purchasing sunscreen. SPF full form is Sun Protection Factor. This will determine how long you will be protected from the sun.

Dermatologists advise applying sunscreen with an SPF of at least 30. SPF 15 blocks approximately 93 percent of UVB rays, whereas SPF 30 protects approximately 97 percent. An SPF of 30 or higher is recommended by the American Dental Association.

If you're daring and enjoy being outside during the day for long periods of time, invest in a sunscreen with a higher SPF, such as SPF50! If the only time you're exposed to the sun is on your way from home to work, buy a sunscreen with a low SPF.

Do sunscreens with high SPF protect better?

The SPF of a sunscreen is a measurement of how well it protects you from sunburn. However, a greater SPF number does not always imply superior sun protection. People sometimes believe that if they use SPF 100 sunscreen, they won't get sunburned or that they can stay out in the sun for far longer than is healthy.

  • Under ideal settings (such as those seen in a lab), a sunscreen with a higher SPF and broad-spectrum coverage protects against sunburn, UVA damage, and DNA damage more effectively than comparable products with lower SPF values.
  • A sunscreen with a higher SPF will often have a lower UVA/UVB protection ratio. Although high SPF sunscreens may prevent sunburns, they do not protect against UVA-induced free radical production, which can lead to melanoma.
  • Higher SPF sunscreens have higher concentrations of the ingredients that filter the sun, as you might expect. Tissue damage, hormone imbalance, and allergic reactions have all been linked to some of these active substances.
  • No matter how sensitive your skin is, an SPF 30-50 will suffice for sunburn protection if worn appropriately.

Different types of SPF

SPF full form is Sun Protection Factor and there are generally two types of SPF:

Mineral Sunscreen:

  • Mineral sunscreen is applied directly to the skin. To reflect UV radiation away from the skin, they use chemicals like titanium dioxide and zinc oxide.
  • SPF creates a protective coating on the skin, whether it's physical or mineral. They are also known as sunblocks because of their ability to block UV rays from entering the skin.
  • People with acne-prone skin should use physical sunscreens. They don't clog pores in any way.
  • When you're wearing makeup, though, they might not be the ideal option. They are thick and oily when applied on the skin.

Chemical Sunscreen:

  • Chemical sunscreen, on the other hand, sinks into your skin and contains active chemicals that absorb UV radiation.
  • Chemical SPF absorbs UV rays and allows them to pass through the skin. They appear lighter and less greasy on the skin.
  • These are suitable for use prior to applying makeup. Chemical sunscreens are also an excellent choice if you have dry skin.
  • Chemical SPF absorbs UV rays and allows them to pass through the skin. They appear lighter and less greasy on the skin.
  • These are suitable for use prior to applying makeup. Chemical sunscreens are also an excellent choice if you have dry skin.

Broad-spectrum SPF:

While many of the properties of your selected sunscreen should be left to personal discretion, there are two things you shouldn't skimp on: an SPF of at least 15, and broad-spectrum protection. While most individuals recognise the relevance of SPF value, they may not realise the necessity of broad-spectrum coverage.

The phrase "broad spectrum" was coined by companies to denote a sunscreen that protected against both UVA and UVB rays. It was a step in the right direction, but manufacturers didn't have to meet any testing criteria to label their products this way for a long time, thus the quantity of UVA protection was frequently limited.

While UVB rays induce immediate visible damage, such as sunburn redness, UVA rays cause skin to tan, which is a symptom of damage to all layers of the skin. While UVA and UVB radiation are prevalent outside all year and in all weather conditions, UVA rays can permeate glass, including automobile and workplace windows. That's why it's critical to use sunscreen whether you're going outside or not, and to look for "broad-spectrum" lotions that protect skin from both types of UV rays.

Tips for choosing & using sunscreen

  • Consider SPF: SPF refers to the amount of UVB rays that a sunscreen can block. Sunscreen with an SPF of at least 15 will help protect you from the UV rays that you are exposed to on a regular basis. Most dermatologists, however, advocate taking a sunscreen with an SPF of at least 30 because it blocks roughly 97 percent of UVB radiation.
  • Examine the Active Ingredients: Examine the sunscreen's active ingredients. Look for products with titanium dioxide, zinc oxide, and avobenzone in the ingredients list. Make sure to stay away from sunscreens that contain vitamin A. (commonly referred to as retinyl palmitate).
  • Choose a broad-spectrum SPF: Choose a broad-spectrum sunscreen with an SPF of 30 to 50. It aids in the protection of your skin from sunburn and sun damage. It also aids in the prevention of UVA radiation.
  • Formulation of Sunscreen: The distribution format of a sunscreen affects how it feels and appears on a person's skin, and this is referred to as sunscreen formulation. On the market, there are three typical sunscreen formulas. Discover the types of SPF available.
  • Lotions with SPF: These are some of the most popular and hydrating sunscreen formulas. They come in a variety of colors and textures to suit different skin types.
  • Sprays of Sunscreen: These are ideal for applying sunscreen to areas of the body that are difficult to reach. They are an excellent choice for people who have a lot of body hair.


  • Wash your face: Sunscreen should be applied directly to the skin for optimum protection. Remove any makeup or oil that could prevent the sunscreen from adhering effectively by washing with your favorite facial cleanser.
  • Apply a thick layer of sunscreen: As a matter of thumb, for your face, you'll need around a nickel-sized dollop.
  • Cover your upper chest and neck as well: Sunscreen should be applied on the forehead, cheeks, nose, and chin, but not to other sensitive areas.
  • Apply makeup over through the sunscreen: If you regularly wear moisturizer, foundation, blush, and other makeup, you can do so now.


SPF full form is Sun Protection Factor, it is a measurement of how much UV radiation is needed to burn your protected skin against how much UV rays are needed to burn your unprotected skin. UVB rays are known to cause damage to the epidermis. UVA rays penetrate the epidermis and reach the dermal layers of the skin. Sunscreen with SPF absorbs or reflects these rays, protecting the skin. The two basic types of SPF are: mineral and chemical ones. SPF levels might vary. Dermatologists recommend applying sunscreen 30 minutes before going outside. Every two hours, reapply sunscreen.


  1. Is SPF really Necessary?

It's a prevalent fallacy that people with dark complexions don't need sunscreen. Melanin is more rich in dark-skinned people. Melanin protects the skin from UV damage to some extent. Melanin, on the other hand, is ineffective in protecting the skin from UVA rays.

2. When Is It Best To Put On Sunscreen?

Sunscreen should be used every time your skin is exposed to the sun. If you're not a fan of the sensation of sunscreen, make sure you apply it during peak hours. In India, the sun is at its brightest between 10 a.m. and 2 p.m. The sun's beams are at their most powerful during these hours.

3. How Frequently Should You Use Sunscreen?

Dermatologists advise that you apply sunscreen 20 minutes before going outside every time. If you spend a lot of time outside, apply sunscreen 15-30 minutes before you leave the house. When you're constantly exposed to the sun, reapply every hour.

Use a minimum of SPF 30 and use it every day without fail!