The basic principle is that your skin enough oxygen and blood that is making it look dull and tired not receive. Some of the reasons which may lead to these are:
Dust And Pollution
Your daily commute from home to office and back not save your skin. The dust has settled on the skin giving it a dull appearance. In combination with a bass skin, this substance can hamper your long-term appearance.
The killing heat combined with harmful UV rays can not only give you a bad tan, but also the skin look dull. This is because the sun takes the moisture from the skin, making it rough and wrinkled. Constant excessive exposure will make your skin dull and enhance the aging process.
Argan oil has the ability to repair and rejuvenate damaged skin. It heals, restores and leaves your skin radiant. ArganLife Argan oil has excellent antioxidant properties and helps to destroy free radicals. It can also even out your skin tone, making it a more healthy-looking texture and a subtle sheen.
Your skin reflects what you eat and if it does not get proper nutrition, it will seem dull.
If you do not use the right products and make an effort not to regularly clean your skin of all dust, dirt and pollution, you will end up with dull skin and possibly other beauty issues such as acne, scars, etc.