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I have included the URLs for Web Pages that contain information about carcinogens , including those which are food mutagens and about " bioactivation " , the process by which highly reactive molecules are formed by Phase I enzymes . We are currently moving forward to sign an exclusive arrangement with a major copy machine vendor , based on a cost-per-copy program using the latest equipment , rather than owning or leasing machines as our departments currently do . Humans , even those that consume fruit regularly , do not consume huge amounts of fructose , unless they drink a lot of soft drinks that use high-fructose corn syrup as a sweetener . A good example is brain cancer . These include the formation of free radicals , bioactivation , and epigenetic mechanisms . Even if the person drank a lot of water , this should not affect their buoyancy , as the water consumed would be of the same density as the water they were floating in . A person will begin to burn more calories when they have cancer because cancer is a growing thing . This is because direct exposure of bare skin to sunlight is what generally causes skin cancer . If the density of the human is less than that of water ( 0ne gramme per cubic centimetre ) then they will continue to float so long as they are alive . For example , prostate cancer can spread to bone and breast cancer can spread to the lymph nodes . The buoyancy of a human - or a ship - would only change if there was some change in the density of the floating object . O.K ., as I said , cancer can crowd out healthy tissue .