Tag Archives: Sunblock

The benefits of Caffeine on the skin


When we think caffeine, we usually think of it being in a nice warm cup of joe in the morning, but would you think of looking for it in your skin care products? For skin care professionals, the answer is “yes!”

There has been an increase of caffeine being used in skin care because of its high biological activity and ability to penetrate the skin. Applying it on your skin has shown to be a great antioxidant, and can reduce cellulite. It is used as an active compound in anti-cellulite products because it prevents excessive accumulation of fat in cells. Here are a few findings of other benefits:

In 2001, a study by the University of Washington showed caffeine had killed UV damaged skin cells, while leaving healthy skin cells normal.

Also, over the years, studies have shown its anti-inflammatory properties, such as when caffeine is placed under the eye, it can help reduce puffiness and dark circle as they are caused by inflammation and poor circulation.

Now, you know why some skin care products have it in their list of ingredients. Most skin care products will have 3-5% caffeine listed.

Sunblock (physical) versus Sunscreen (chemical)

Sunglass ,Hat and Sun block cream

Physical sunscreens tend to be better tolerated by most skin types because the chemical filters used in chemical sunscreens can be irritating for many people. However, physical sunscreens tend to leave a white cast or white streaks after application and don’t offer as much UVA protection compared to chemical sunscreens. Physical sunscreens are also a bit thicker so they may be more difficult to apply. Since they each have their pros and cons, many of today’s sunscreens contain both physical and chemical UV filters.

Physical Sunscreens Chemical Sunscreens
How they work: Physical sunscreens protect your skin from the sun by deflecting or blocking the sun’s rays. Chemical sunscreens work by absorbing the sun’s rays. Some chemical filters can scatter sun rays, but still mostly just absorb them.
As known as Sunblock; Inorganic sunscreen Organic sunscreen
UV Filters
  • Titanium dioxide (TiO2)
  • Zinc oxide (ZnO)
  • Octylcrylene
  • Avobenzone
  • Octinoxate
  • Octisalate
  • Oxybenzone
  • Homosalate
  • Helioplex
  • 4-MBC
  • Mexoryl SX and XL
  • Tinosorb S and M
  • Uvinul T 150
  • Uvinul A Plus
Stability Generally stable Most are photostable, but some are not. Avobenzone is notoriously unstable. However, it can be stabilized when formulated in conjunction with other UV filters.
Comedogenicity (Clog pores) Titanium dioxide can be problematic for some people. (If you break out from mineral make up and physical sunscreen, titanium dioxide could be the culprit.)
Zinc oxide is generally safe. It can be used on delicate skin and is a main ingredient in diaper rash cream.
Chemical filters tend to be more irritating to skin.
If it gets in your eyes, it can make your eyes sting and water.
Some can cause allergic reactions.
Protection Titanium dioxide protects against UVB rays, but not the full spectrum of UVA rays. Zinc oxide protects against the entire spectrum of UVB and UVA rays. Starts protecting immediately upon application. Chemical filters offer more coverage against UVA and UVB rays than physical sunscreens, but the range of protection will depend on the particular active and its stability.
Avobenzone, for example, protects against the full spectrum UVA rays.
Must wait 20 minutes after application for effective sun protection.
Texture Thick and opaque, may be hard to apply.
Tends to leave a white cast or tint.
Rubs off more easily and must be frequently reapplied.
Colorless, odorless, usually runny. Can sometimes double as a makeup primer, depending on the active and the formulation.
Safety Pretty safe, FDA approved.
Don’t cause free radicals.
*Note: Nan particle zinc oxide and titanium dioxide are controversial at the moment.
Generally safe, however some chemical filters generate free radicals which can cause skin damage, irritation, and aging.
*Many chemical UV filters have not been FDA approved in the States, but are in sunscreens sold in Europe and Asia.