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This means they have enough energy to remove an electron from ionize an atom or molecule. Ionizing radiation can damage the DNA genes in cells, which in turn may lead to cancer. Different types of UV rays reach the ground in different amounts. The amount of UV exposure a person gets depends on the strength of the rays, the length of time the skin is exposed, and whether the skin is protected with clothing or sunscreen.

Most skin cancers are a result of exposure to the UV rays in sunlight. Both basal cell and squamous cell cancers the most common types of skin cancer tend to be found on sun-exposed parts of the body, and their occurrence is typically related to lifetime sun exposure.

The risk of melanoma , a more serious but less common type of skin cancer, is also related to sun exposure, although perhaps not as strongly. Skin cancer has also been linked to exposure to some man-made sources of UV rays. Many studies have found that basal and squamous cell skin cancers are linked to certain behaviors that put people in the sun, as well as a number of markers of sun exposure, such as:.

Studies have also found links between certain behaviors and markers of sun exposure and melanoma of the skin , including:. However, some studies have shown possible links to some other cancers , including Merkel cell carcinoma a less common type of skin cancer and melanoma of the eye. Studies have found that people who use tanning beds or booths have a higher risk of skin cancer, including melanoma and squamous and basal cell skin cancers.

The risk of melanoma is higher if the person started indoor tanning before age 30 or 35, and the risk of basal and squamous cell skin cancer is higher if indoor tanning started before age In general, the American Cancer Society does not determine if something causes cancer that is, if it is a carcinogen , but we do look to other respected organizations for help with this. For example, pasteurized fermented foods, such as yogurt and kefir, contain bacteria that are safe to eat. The presence of germs in raw milk is unpredictable.

People can drink it for a long time without getting sick, and then get sick if their milk is contaminated. In some states it is legal to buy or sell raw milk. Because of the chance for serious illness, federal law prohibits dairies from distributing raw milk across state lines in final package form packaged so that it can be consumed. This means that raw milk can only be distributed across state lines if it is going to be pasteurized or used to make aged more than 60 days cheese before being sold to consumers.

Each state makes its own laws about selling raw milk within the borders of the state. In about half of states, sale of raw milk directly to consumers is illegal. In the remaining states, raw milk may be sold directly to consumers. CDC collects data on foodborne disease outbreaks voluntarily reported by state, local, or territorial health departments.

States that allow the legal sale of raw milk for human consumption have more raw milk-related outbreaks of illness than states that do not allow raw milk to be sold legally. Skip directly to site content Skip directly to page options Skip directly to A-Z link. Food Safety. Section Navigation. Facebook Twitter LinkedIn Syndicate. Open All Close All. The risks of raw milk. Milk production and contamination.

How does milk get contaminated? Unproven health benefits of raw milk. Is raw milk a good source of beneficial bacteria? I know people who have been drinking raw milk for years, and they never got sick. Why is that? Raw milk laws and outbreaks linked to raw milk. Cdc-pdf [PDF — 1 page] [text version] Find out the current legal status of the sale of raw milk in D. Learn about the real risks involved with raw milk. Real Stories of the Dangers of Raw Milk. Find out how drinking raw milk affected three moms and their families.

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