I'm sure that you know that cosmetics are  products used to enhance or alter the appearance or fragrance of the body.
Yes, I know. I actually have a degree in cosmetology.
That's great!. I like the fact that  alot of them are made for applying to the face and hair.
Yeah, it seems that they are also becoming more diverse as far as skin tones, hair color, etc. are concerned.
Maybe, one thing that I have noticed is that  they are most often a  mixtures of chemical compounds; some being derived from natural sources 
I have noticed that, too. It seems that companies are becoming more aware of the dangers of harsh chemicals to the body.
I know you might have noticed that the most often seen cosmetics in the market are pstick, mascara, eye shadow, foundation, rouge, skin cleansers and others 
I have noticed that. I really like the fact that makeup has become an art form, instead of just a mundane part of a daily routine.
foundation, blush, and bronzer. Other common cosmetics include skin cleansers, body lotions, shampoo and conditioner, hairstyling products (gel, hair spray, etc.), perfume and cologne.
In the United States, the Food and Drug Administration (FDA), which regulates cosmetics, defines cosmetics as "intended to be applied to the human body for cleansing, beautifying, promoting attractiveness, or altering the appearance without affecting the body's structure or functions". This broad definition includes any material intended for use as
Cosmetics
Cosmetics are substances or products used to enhance or alter the appearance of the face or fragrance and texture of the body. Many cosmetics are designed for use of applying to the face and body. They are generally mixtures of chemical compounds; some being derived from natural sources (such as coconut oil), and many synthetic or artificial. Cosmetics that are applied to the face to enhance ones appearance are often called make-up or makeup. Common make-up items include: lipstick, mascara, eye shadow,