Dietary fats are important because they are the ones that produce  energy for the body. Fats should be monitored since excessive fats  can be risky for your health.
Age last birthday: One method of insurance rating which rates people a their age as of their last birthday, with such rating held until the next birthday. If your policy is approved at your current age (prior to your next birthday), you will be rated at your current age (as opposed to age nearest birthday).
Given the current year of 2010, if someone had already celebrated their birthday today, they would have been born in 2010 - 65 = 1945. If they had not yet celebrated their birthday, they would have been born in 1944. So a person born in 1994 would be 17 years old in 2011. Birthdays near the end of a year however may throw off the formula.