One of the most important differences between conventional skin care and natural or organic skin care is not the active ingredients like green tea or vitamin c, which excludes water can amount to about 5% of a product, rather it is with the basic ingredients. In natural skin care, the basic ingredients are often a mixture of vegetable oils and lubricants or wax as opposed to the synthetic ingredients commonly found in conventional skin care. The use of base oils has enormous advantages for the skin. Instead of being an inert (non active) synthetic carrier for the active ingredients, base oils contain nutrients like vitamins, minerals and essential fatty acids that support and approach the skin. I would go as far as counting base oils as active ingredients in skin care. So, in fact, in natural products up to 95% of any product has a supporting active effect on the skin. In comparison, the synthetic base constituents lack conventional skin care by enlargement, significant therapeutic benefit.
There are many factors that affect the absorption of topical ingredients in the skin and, in reality, many current creams are just on the surface of the skin, which effectively plots superficial skin cells but rarely has any effect on deeper layers. The skin is designed to be selectively absorbent, which is relatively permeable to fat-soluble substances and relatively impervious to water and water-soluble substances. Fat-soluble ingredients like oils are absorbed more efficiently and have a greater effect on the cell membrane and skin matrix, which support the skin's nutrition. As a carrier, oils can also transport essential oils, phytonutrients, vitamins and minerals in the skin where they are most effective, rather than just having a surface effect. In addition, oils also help prevent skin dehydration by providing an effective water loss barrier, which in turn leads to a more powerful and more hydrated skin.
Oil absorption is affected by the viscosity or thickness of the individual carrier oil with thicker oils that tend to be absorbed slower through the skin. Generally, fine light oils are preferred for use in the face because they absorb quickly and penetrate easily into the surface layer of the skin without leaving a bold feeling. Heavier oils are suitable for dry facial skin, skin on the body, such as bath oils and massage oils. The degree of unsaturation also affects oil absorption. In general, the more polyunsaturated fat content in the oil, the better the absorption. For example, Rose Hip oil is high in polyunsaturated and has a relatively low viscosity, making it ideal for use in facial salons and creams, as it absorbs quickly into the skin.
It is worth noting that cold pressed oils tend to have a greater degree of unsaturated than heat extracted oils and for this reason preferable. The cold pressing process involves placing the nut or seed in an expeller that squeezes the oil. There is some heat created by friction, but it causes little damage to the oil or its constituents. Heat extraction uses temperatures up to 200 degrees Celsius, which dramatically increases the exchange of oil, which makes it much more cost effective but at the same time harms the oil content of nutrients. Unsaturated fatty acids are easily damaged at high temperatures and thus heat extracted oils will have significantly lower levels. While these oils are often used as cooking oils, they should be avoided for use in skin care and aromatherapy because they lack therapeutic benefits with the cold-pressed versions.
A common misconception regarding the use of oils is to apply them to the skin will only exacerbate oily skin and further create congestion. Heavier oils can sit on the surface of the skin longer before absorption, which is not ideal for already oily skin. However, the lighter, less viscous oils are absorbed quite quickly and help in many cases to balance skin oil instead of contributing to it.
Oils are absorbed effectively in the skin instead of sitting on the surface and therefore it is unlikely that they cause or aggravate congestion. But many natural skin care products are dependent on wax and lubricants as basic ingredients. While it is very beneficial for the skin, they are more likely to sit on the surface and therefore have greater likelihood of contributing if congestion is already a problem. They are unlikely to cause congestion that was not previously present and the skin reaction really depends on the individual skin type. The proportion of wax that melts to oils varies in different products for different skin types. If you are unsure of the product to be used for your skin type, it is worth asking the manufacturer or supplier what one of their special products is most beneficial for your skin type.