Is it bad to use anti aging cream at a young age?

It depends on your skin texture and pigment.Overall, I'd say people start in their 30's.

http://www.oregonlipo.com/anti-aging.php

Answer
Many women experience premature aging due to long exposure in the sun. The sun’s UV rays tend to accelerate the aging process and you may see wrinkles in women who are in their early twenties. Other factors also accelerate aging like stress, a high calorie diet, eating sugar-infested foods! When you notice the fine line or wrinkle I think that’s a pretty good sign that you should start taking care of your skin. But in order to prevent premature wrinkling, if you are over 16, and are out in the sun a lot, you may want to start using a day face cream like DaySkin to protect your skin from the harmful rays of the sun. It’s got nutrients—Vitamin E and Vitamins B3 and B5 which help soften the skin and stimulate the production of collagen and elastin. The zinc oxide and titanium dioxide protect skin from both UVA and UVB rays.