Explanation: In sea water there is typically close to 35 grams of dissolved salts in each liter. It is written as 35 ‰ The normal range of ocean salinity ranges between 33-37 grams per liter (33‰ - 37‰). But as in weather, where there are areas of high and low pressure, there are areas of high and low salinity.
The person would gain weight because the undigested food would sit in the person's body. The person would not lose or gain weight, but it would take longer for the body to use the food that was eaten.