Cream after 30 years should contain the active moisturizing ingredients, as this is the main problem that must be addressed. Lack of moisture caused by the natural loss of energy, slow-motion starts all processes. Choose a cream with fruit acids and rich in vitamin C.
40-year-old age requires extensive resources - moisturizing, having a lifting effect. Compositions enriched in vitamins, ceramides and essential skin hyaluronic acid at this stage.
Change the face cream just because you feel that the skin "used" and means not having the desired effect, is wrong. Signal a change of cream may be a change in her condition - excessive dryness, oiliness, the presence of scaly areas, etc.
The cold season requires the use of creams with a dense texture and plenty of softener, spring and summer skin requires protection from UV light and clean pores.
When changing lifestyle justified and replacement of face cream - diet, for example, causes a loss of nutrients and moisture, so you need to compensate for this deficiency by using a properly sized cream for the skin. Frequent or prolonged stress voltage nervous system affects the condition of the skin (dry, dull, redness), so give it access to vitamins, elastic support and active saturated with moisture should a new face cream.