The diaphragm helps in the flow of the air to and from the lungs. The diaphragm moves down as one inhales, and then up as one exhales. The movement is controlled by the phrenic nerves. Whenever there is irritation on these nerves, it induces diaphragm spasm.
Titanium dioxide is used as a UV filter in sunscreen products to protect the skin from harmful UV rays when exposed to sunlight.
Although titanium dioxide is a natural ingredient, pure titanium dioxide in nature is almost always adulterated with potentially harmful contaminants such as lead and iron. Therefore, titanium dioxide is purified via synthetic processes for use in cosmetics and sunscreens.