Sunscreen or sunblock are commercially available in the form of spray, gel or lotion. Sunscreen absorbs as well as reflects some of the UV radiations of the sun and protects the body from skin burns. Sunscreen can also use to prevent dark spots and wrinkles.
The ingredients of sunscreens help to protect the body from solar radiation but sometimes they may also cause certain health problems.
U.S Food and Drug Administration also performed research. The same deduction was delivered by both studies. FDA has set a threshold for the absorbance of the ingredients into the bloodstream of the body and at that limit, these ingredients can be considered harmless but absorbance of some active constituents of sunscreens into the body exceeds the standard set by FDA.
There was no evidence that these constituents of sunscreen can create damage that’s why oncologists and agencies were concerned about it and found that people will not stop using these products to shield skin from harmful solar rays and prevents skin cancer.
Dr. Janet Woodcock from the FDA found that it is not compulsory that every ingredient inside a sunblock is harmful if it gets absorbed into the body through the skin.
FDA researchers found four active ingredients were absorbed at a level that exceeds the FDA-set standard (0.5 ng/ml) into the bloodstreams of study participants. Commonly used sunscreens contain these four ingredients.
Dr. Kanade Shinkai found that if the concentration of absorbed sunscreen ingredients exceeds the FDA threshold level then they are subjected to safety testing and declared two studies by FDA to pioneer and show the absorption of sunscreen components. She emphasized on safety testing because it is unknown that these ingredients are dangerous or not.
Common ingredients inside a sunscreen are avobenzone, oxybenzone, octocrylene, and ecamsule. All these ingredients work together and absorb UV radiations coming directly from the sun into heat.
In sunscreens, the active ingredients that absorb UV rays from the sun and convert them into a small amount of energy include ecamsule, oxybenzone, octocrylene, and avobenzene.
There is no evidence that those active ingredients are harmful, however, FDA is concerned that oxybenzone can affect hormone activity.
The study was set upon 48 healthy individuals who were randomly asked to apply one of the four sunscreen products on their bodies. The study found that in the majority of the participants, after a single application the absorbed active ingredients exceed the FDA standards. A new study found that chemicals used to make sunscreens not only protect skin from the sun.
These active ingredients of sunscreens stay longer in the body; in more than double study participants, over a week concentration of the chemicals like actisalate, avobenzone and octinoxate were recorded high, however, for about 21 days concentration of oxybenzone and homosalate stayed above FDA threshold.
The concentration of these ingredients was measured in nanograms and Dr. Friedman found that determining a very small quantity of these constituents inside blood is feasible and it has no effect on health or safety.
People apply sunscreens on the body and are exposed to sunlight and taking this into account FDA found a barrier which was the unnatural lab conditions because absorption can be affected by sunlight and heat.
Professor Dr. George Hruza of AAD found that the danger of skin cancer can be lowered by applying sunscreens.
The AAD delivered that everyone should search for shade and wear clothes to protect their body and wear sunscreen (broad-spectrum having 30 or above SPF) on all exposed parts of the body
Shinkai suggested a preferable mineral sunscreen containing titanium dioxide or zinc oxide. These sunscreens protect the skin exposed to the sun and don’t get absorbed in the body.