The three claims I will be researching are the claim that sunglasses cause sunburn, due to less melanin is produced. The claim that tanning beds cause birth defects during pregnancy. And the claim that people should have their cholesterol levels checked in the summer. Do sunglasses cause sunburn? Skin color changes in response to sun exposure. The pituitary gland is the trigger that produces the hormones that produce melanin. Dr. Maolem says that if you wear sunglasses, much less sunlight reaches the optic nerve, which tricks the pituitary gland into thinking there is less sunlight. Then, less melanin is produced, causing more sunburn. Melanin is a substance that gives skin and hair their natural color. Dark-skinned people have more melanin in their skin than light-skinned people. Freckles are concentrated areas of melanin. Ultraviolet light has the effect of burning the skin. Melanin prevents ultraviolet light. Melanin therefore prevents the burning effect of the skin. Melanin is the determinant of skin color. It is found in the hair, eyes and ears. Melanin in the skin is produced by cells called melanocytes, found in the epidermis. It is produced in response to light. It actually doesn't come from any gland, although there is a pineal gland that produces melatonin, although it has no effect on humans. There are light-sensitive cells in the retina. Even though they detect changes in light, they can also affect our mood. It wouldn't affect whether or not we get sunburned. Ultraviolet light is a shorter radiation than visible light. It is found in the sun. Once ultraviolet rays penetrate the skin, they begin to act on melanocytes. The rays work as a catalyst to increase production...... middle of paper ......ipoprotein) increases by 8%. While in summer, HDL (high density lipoprotein) increases by around 9%. This proves that during the winter month, we actually consume less healthy foods, which leads to bad cholesterol. The result of this survey could also be due to the fact that many people do not train as much in winter as in summer. People should check their cholesterol levels in the summer to see if they have taken high or low density cholesterol. The claim that sunglasses cause sunburn was true. They actually cause sunburn by deceiving the eyes. Tanning beds cause birth defects due to the use of harmful UVB lamps that destroy essential folate during pregnancy. And cholesterol levels should indeed be controlled during the summer because people eat fattier foods and don't exercise as much during the winter months..