The Right Lipstick Color

Lipstick can make or break the age of the beholder. Lips can look younger and fuller with the right color and formula of lipstick.
Age

When it comes to age, the darker the lipstick shade the older the wearer will look. So if the desire is to look older (Think of when you see a movie with a younger actress playing older, they almost always have her in darker lipstick.) than pick a matte, darker lipstick.

To look younger, use a light shade of lipstick. This will not only help the lips look younger but will also give the appearance of a fuller lip. The fuller the lip the younger the appearance.
Size of Lips

Having fuller lips will already help give a youthful appearance. Unfortunately as we age the lips tend to get smaller. There are products available on the market to help plump the lips. Or it can be made at home. There are also cosmetic procedures that can be done to help plump the lips that have a more lasting effect, but also come with their own consequences.

Applying the lipstick in a certain way can also help give the appearance of a fuller lips. Unfortunately everytime the lipstick wears off it would be necessary to start from the beginning.