This ingredient has been identified by the State of California as being a cause of cancer. Yet, you may be applying this stuff to your skin! We all like our skin to smell great, right? Sometimes that's even the deciding factor when comparing skin care products; right again? Unfortunately, most fragrances are made of ingredients that are known to be carcinogenic or toxic. Avoiding creams with fragrances would be prudent! Then there are Parables. There are several types of parables that are used as preservatives. Parables Rejuvaessence have been shown to interfere with your body's endocrine system, may cause cancer and, may cause allergic reactions and rashes. Not something I want on my skin, but have faithfully been rubbing into my skin for years. Oh, and let's not forget about alcohol. Again there are a bunch of different alcohols that can be found in anti aging skin care products. Alcohol for the most part absorbs moisture and as such can dry your skin and cause irritation. Alcohol can strip your skin of natural protective barriers exposing it to viruses, bacteria and mold. Finally, there's collagen. But wait, didn't I just tell you collagen is an important part of your skin - that it gives your skin strength and firmness? Yep, I sure did. But here's the thing. Collagen molecules are too large to be absorbed by your skin when applied topically. Manufacturers use it as an ingredient in their skin care products to fool you into believing their product is superior. We've just reviewed a few ingredients you want to avoid when comparing skin care products. Now let's take a look at a few good ingredients. Here's an ingredient you'll want to find. Clinical studies have shown Extend-TK, stimulates the re-growth of collagen and elastic. That's a good thing! Then there's the powerful anti oxidant.