Does Natural in Skin Care naturally mean Good?
Although Webster defines "natural" as "not artificial, synthetic, [or] acquired by external means," it is the rare cosmetic ingredient that fits that description. Even water used in cosmetics is generally distilled, deionized, or otherwise purified. All along the continuum of "natural" products, choices have been made to emulsify, stabilize and preserve--to make the products smooth and creamy, keep them fresh, and give them an acceptable shelf life. Even if consumers want products that need to be refrigerated, distributors and retailers will not order them because of the added costs of shipping, storing and greater liability. A growing number of consumers who seek that kind of freshness have been firing up their blenders and following recipes for homemade treatments.1[1] Even these, however, call for essential oils, alcohol, glycerin, lanolin, etc., which are a long way from their natural origins. As reported in Strong Voices, the newsletter of the Breast Cancer Fund, "Approximately one-third of cosmetics and bodycare companies position their products as natural in one way or another . . . But, as you might expect, some companies are more natural than others" (Volume 7, Summer 2005).
Most people who seek out "natural" products are looking for ingredients whose sources they recognize, and that is why many companies now list the source along with the scientific name of the ingredient, as in sodium laurel sulfate (from coconut), or lanolin (from wool). Turpentine comes from pine trees. My grandmother, born in 1901, swore that turpentine helped her arthritic hands, and she may have rubbed them with lard (from bacon) afterwards to keep them as soft as I remember. Perhaps lard and turpentine are "natural," but are they good for the skin, and along with that, what is the definition of "good?" Again, there are no simple answers. If you have found this article through the Eco-Mall, it is safe to assume that you seek out skin care that:
(1) is friendly to the environment ("eco-friendly");
(2) does no harm to animals (commonly referred to as "cruelty-free"); and
(3) does no harm to the human body and ideally does good (is "body-friendly").
Let us examine "natural" skin care in light of each of these issues.
Eco-Friendly
An issue rarely addressed by the cosmetic industry is whether products are environmentally friendly. The LA Times2[2] has reported that consumer products, including cosmetics, pump 100 tons of pollutants daily into southern California's air, second only to auto emissions. These pollutants come not just from the propellants in sprays and aerosols, but also from fluorocarbons, ethanol, butane, acetone, phenols and xylene. Here's how it works: These chemicals evaporate, and when the sun shines they combine with other pollutants to form ozone, a primary component of smog that can cause headaches, chest pain and loss of lung function. This happens outdoors and indoors, which can severely compromise the air quality in our homes and offices.
There is a class of chemicals called PPCPs (pharmaceutical and personal care products) that until recently have received relatively little attention as potential environmental pollutants. PPCPs comprise all drugs (prescription and over-the-counter), diagnostic agents (e.g., X-ray contrast media), nutraceuticals, and other chemicals, including fragrances, sunscreen agents, and skin anti-aging preparations. When phthalates, for example, get into rivers and lakes, they are known to affect the reproduction of aquatic species; and musk fragrances are known to bioaccumulate.3[3] Skincare products may contain botanical ingredients grown with pesticides and chemical fertilizers that are not friendly to the environment, and some may use genetically modified plants in their botanical ingredients.
Cruelty-Free
"Cruelty-free" is generally understood to mean that the products are not tested on animals; sometimes also that there are no animal-derived ingredients in the products. Taken literally, this would imply the absence of lanolin (from wool), beeswax or honey, dairy products, etc. Some labels specifically state there are no animal ingredients.
Body-Friendly
We suggest four criteria for evaluating "body-friendly" skin care products:
· Toxicity
· Occlusiveness
· Comedogenicity
· Effectiveness
1.Toxicity
In our July article we discussed several ingredients which we prefer to avoid in skin care products. To recap, we listed mineral oils, petrolatum, propylene glycol, parabens, phthalates, SLS and SLES. We also called sunscreens into question.
Toxicity (to humans) of skin care ingredients may be divided into three distinct categories:4[4]
a. Carcinogenic, referring to ingredients contributing to cancer
b. Endocrine-disrupting, which refers to chemicals that disturb the body's hormonal balance, and may interfere with its ability to grow, develop, or function normally. Endocrine disruptors may also be carcinogenic.
c. Allergenic, irritating or sensitizing, meaning consumers may have allergic reactions or contact dermatitis (itching, redness, rash, etc.). Individuals with multiple chemical sensitivities may become very ill when exposed to certain of these chemicals.
There are many "natural" skincare companies who include parabens, SLES, and other of these ingredients in their products.
A general note about preservatives: By their very nature preservatives are toxic. They must be toxic to bacteria, molds and yeast to keep the products from spoiling. Another preservative that is gaining use as an alternative to parabens is diazolidinyl urea. This preservative has not been banned from use in Europe, although some authors claim it is carcinogenic because it is a formaldehyde donor. Although formaldehyde is a chemical which occurs naturally in the human body, formaldehyde in the gaseous state is a known carcinogen. From all studies we have read, diazolidinyl urea, when it forms formaldehyde, does not form formaldehyde gas. Nonetheless, when used in high enough concentrations, or even in low concentrations by persons who are especially sensitive to it, diazolidinyl urea-along with almost every other preservative-has been shown to cause contact dermatitis. There are also "natural" products who claim to use no preservative. Most of these contain grapefruit--or other citrus--seed oil extract. As mentioned in Part I of this series, cosmetic chemists I have spoken to insist that these citrus seeds would turn rancid if they were not sprayed with preservative; that that preservative is concentrated in the oil when it is extracted; that this preservative in the extract is what is actually preserving the skincare product; and that the preservative used is generally a paraben.
There are also skincare products that are sold in sealed containers with airless pumps or sprayers. Although it can add significantly to the cost of a product, this type of packaging and delivery is highly desirable, as it keeps air and airborne contaminants out of the product and makes it possible to significantly decrease or even eliminate the use of preservative.
Of the large list of possible cosmetic ingredients, a relative few individually pose high risk, but many people use an array of products every day. It may be that these risks are adding up, or that single ingredients react with others to create toxic combinations, known as synergistic toxicity.
2.Occlusivity
The skin is the body's largest organ. The lungs breathe, and so does the skin, so to speak: The "breathing" skin provides an exit for toxins and chemicals--respiration in the form of perspiration. Lotions and salves that occlude this exit may initially soften the skin by keeping moisture from escaping, but may actually inhibit the overall health of the individual, besides weighing down the skin and causing it to sag and age. Nutrients applied to the skin that improve the skin's health may have a positive effect on the whole body, because they are absorbed into the bloodstream through the skin. When we choose body-friendly skin care, two important criteria come into play: that the products not be toxic to our skin or our bodies, and that they not be occlusive-allowing nutrients in and toxins out.5[5] The bonus comes when the ingredients that are allowed in also bring the skin into balance and nourish it. This is the topic of Part III of our series of articles: What Nutrients and Ingredients are Important for Healthy Skin? (late September 2005). Here we address ingredients common to "natural" skin care that may be occlusive and/or comedogenic.
Look up "occlusivity" on the web and you will find hundreds of references to occlusivity and its benefits. The reason companies tout the benefits of occlusivity is that it holds water in the skin. When water can't escape, the skin stays soft and moist, and that sounds like a good thing. Imagine wrapping your skin with plastic wrap and wearing it around all day-an extreme example of occlusivity. Pretty soon it would start to stink in there as the toxins that usually escape with perspiration and generally evaporate into the air get trapped between the skin and the plastic. Now imagine that those same toxins can't leave the bloodstream because the skin's normal respiration is blocked. Where will they go? In some cases, they fester under the skin and form deep-down blemishes; in extreme cases, where occlusive lotions are used all over the body for extended periods, they may deposit in the liver and add to the body's toxic load.
Sometimes it may be beneficial to use occlusive salves for a limited time. If you want to climb Mt. Everest, for example, or ski at high altitude where the air is thin and dry and you are close to the sun, it's a good idea to wear a lotion that holds the water in the skin. For babies with diaper rash, it's good to use a salve that keeps the water away from the skin! For most of us, these are not constant conditions, and treatments that hold water in over time are undesirable.
Standard cosmetics experts may disagree with this reasoning. Paula Begoun in Don't Go to the Cosmetics Counter Without Me (5th ed., 2001) states: "According to many 'natural' cosmetics companies, mineral oil (and petrolatum) comes from crude oil (petroleum), is used in industry as a metal-cutting fluid, and therefore can harm the skin by forming an oil film and suffocating it. . . . This foolish, recurring misinformation about mineral oil and petrolatum is maddening. After all, crude oil is as natural as any other earth-derived substance. . . Mineral oil and petrolatum . . . can keep air off the skin to some extent, but . . . it doesn't suffocate the skin!" (pp. 11-13). She also states that antiperspirants "cannot absorb into the skin . . ." (p. 14). I maintain that anything rubbed onto the skin will be absorbed, as long as the molecules are small enough to pass through the skin membrane; this is how patches work to deliver medication. Although Begoun makes a good point that crude oil is "natural," I believe in making educated choices of which earth-derived substances we apply to the skin, and crude oil is not on my list.
It should be noted that there are degrees of occlusivity: If an ingredient is occlusive when used by itself, it will be less so when used in combination with non-occlusive ingredients. A small amount of beeswax used to emulsify jojoba and water will be far less occlusive than rubbing beeswax alone onto the skin. With that in mind, besides mineral oil and petrolatum, here are some of the more common occlusive ingredients found in "natural" skin care:
a. beeswax and other waxes
b. castor oil
c. cocoa butter
d. dimethicone
e. honey
f. lanolin
g. sunflower oil and other vegetable oils
3. Comedogenicity
Unlike occlusive oils like mineral and sunflower oil, which do not penetrate, comedogenicity refers to the tendency of a substance to get into the skin's pores and clog them. This is especially bothersome in face care products, where clogged pores may lead to acne and blackheads. The word comedo is the medical term for blackhead, so comedo+genic means "friendly to blackheads." Some cosmetic-ingredient glossaries equate "non-comedogenic" with "non-occlusive," but that is a misunderstanding; while beeswax, mineral oil and zinc oxide (among others) are known to be occlusive, they are non-comedogenic. This is because they lie on top of the skin and do not penetrate. Others, like sunflower oil, may be both occlusive and (somewhat) comedogenic. Below is a list of the relative comedogenicity of some common "natural" cosmetic ingredients6[6] (source: http://www.geocities.com):
Very Comedogenic
Somewhat Comedogenic
Not Comedogenic
Capric/caprylic triglyceride
Anhydrous lanolin
Allantoin
Cocoa butter
Avocado oil
Beeswax
Lanolic acid
Capric & caprylic acid
Cyclomethicone & Dimethicone
Linseed oil
Castor oil
Ethanol
Olive oil
Coconut oil
Glycerin
Peach kernal oil
Corn oil
Jojoba
Sweet almond oil
Grape seed oil
Kaolin (clay)
Glyceryl stearate
Mineral oil (USP)
Hexylene glycol
Oxybenzone
Lanolin alcohol & oil
Panthenol
Mineral oil, cosmetic grade
Petrolatum (USP)
Mink oil
Polysorbates
Peanut oil
Propylene glycol
Safflower oil
SD alcohol
Sesame oil
Sodium hyaluronate
Sunflower oil
Sodium PCA
Tocopherol (vitamin E)
Sorbitol
Squalane
Titanium dioxide
Waxes
"Note: Even somewhat or very comedogenic ingredients can be present in non-comedogenic formulas when used at percentages low enough that the end formula won't clog pores" (ibid.). The important point is to look at their relative position in the ingredients list. If a comedogenic ingredient is toward the top, then it is probably present in a quantity large enough to clog pores. Unfortunately it is impossible from the ingredients list to know whether for example ingredient #5 represents 20% of the formula or 2%. Thus we need to be able to trust the manufacturer when the label states "non-comedogenic."
4. Effectiveness
Let us assume that every skincare company's raison d'etre (before or after the profit motive) is to create products that make the skin feel and look good, and that probably means it's soft and not dry. Add some additional goals--anti-aging, anti-acne, skin-smoothing--and you've covered most of the bases. Most skincare products, "natural" or otherwise, achieve these goals by using occlusive ingredients that hold moisture in and keep the skin soft and "plump."
If, however, we are looking for the beauty of overall glowing good health in the skin, we need to ask for more than this from our skin care.
We agree with Charles DePrince, president of GoForLife Labs, who states: "The idea of 'natural' could mean a product containing all natural ingredients; however, I believe there should be a more significant meaning to the idea. I think the natural course to attaining beauty is a healthier and potentially more lasting one than with the use of harsh or radical treatments such as Botox, face lifts and peeling. The 'natural' idea would be to support the living and natural cells of our skin with nutrients that could support such things as the body's natural ability to retain moisture, to support natural collagen development, or to reduce hyperpigmentation. This way, by supporting the natural health of the skin, I believe the cumulative effect would be to develop healthier skin as both the path to and result of beauty."7[7]