This question is usually asked for one of two reasons. Either someone has been told that older women should tone it down, and wants to know whether that is true. Or their usual routine has stopped looking the way it used to, and they are wondering whether the answer is less of it.
On the first: there is no amount of makeup that is inappropriate at 70. Nobody needs permission, and the idea that visible makeup is unseemly past a certain age is a social opinion dressed up as advice. Wear a red lip at 85 if you want one.
On the second there is a genuine technical answer, and it is about film thickness rather than quantity of products. Mature skin creases a thick film, and it shows a hard edge where coverage stops. So the same routine that looked polished at 45 can read heavy at 70 — not because it is too much makeup, but because each layer is too thick for the surface it is on. The adjustment is thinner layers of the same things, not fewer things.
The second real change is where the return is. At 25 the eye is drawn to lid color and lip color. At 70 the features that have changed most are the ones that have lost definition — lashes thin and pale, brows go sparse and gray, the lash line softens. Which means a filled brow and a defined lash line do more visible work than anything you can put on a cheek or a lid. Most people get this backwards and spend the time on base.
And the third: light. Skin that produces less oil reflects less light, so a face can read flat and tired at the same coverage that looked fine a decade ago. The answer is not more product; it is a slightly dewy or satin finish instead of a matte one, which costs nothing and changes the impression substantially.
