By weight, the average human adult male is approximately 60% water. However, there can be considerable variation in body water percentage based on a number of factors like age, health, weight, and sex.
How to claim medical tax deductions. Once you've totaled your medical expenses for the year, fill out the appropriate form in your tax return. If you include medical expenses in your itemized tax deductions, make sure to save your medical bills and payment statements as proof.
You can claim 23 cents per mile driven in 2015, but thereâs a catch. Only medical expenses â both mileage and other bills combined â in excess of 10 percent of your adjusted gross income can be deducted. For those age 65 or older, the threshold to claim a deduction drops to 7.5 percent.