30 June 2009

Why are Phthalates bad?

Ever seen 'phthalate' listed on a cosmetic ingredient list? Probably not - they aren't required to be listed under ingredients in many countries. So why are they in your cosmetic products like perfume, nail polish, moisturisers and hair spray? They are there because they fix scent, that is, they make it last longer in its original intended form without degradation. They are also found in many other products, that can be found in the home, such as kid's toys, functioning as plasticizers in the plastic - to make it soft. However, we are concerned about them in cosmetic products because of the skin's ability to absorb all manner of chemicals and ingredients put on them. Studies show that your skin can absorb up to 90% of a given chemical that is topically applied - in other words, it is a giant sponge. Phthalates and parabens can show up in the urine a mere 20 minutes after application of a cosmetic or body care product that contains them. It depends on the chemical of course - and phthalates are one group that readily absorbs into the body.

Phthalates are known endocrine disruptors and estrogen mimics. For this alone, one would want to avoid them where possible. They've also been linked to metabolic disorders and hepatocarcinogenicity.
When choosing a cosmetic product, natural really does matter. There are alternatives - just because it isn't listed on the label, doesn't mean that it is absent. The next time you are in your favourite bath and body products shop, ask if your favourite product contains phthlates, then you can make an informed decision. Natural Matters!

For more information, check out www.nottoopretty.org, the source of the image to the right, and the report on phthalates, by the Campaign for Safe Cosmetics.

22 June 2009

Organic Islands Festival 2009


On July 4th and 5th we will be exhibiting at the fifth annual Organic Islands Festival here in Victoria, BC. There will be over 150 local businesses, farms and community groups showing natural products from honey to hand-made soap, clothing to sustainability initiatives. They've expanded the venues again this year and have included a Children's Village and Play Zone, where the little ones can muck about and learn about the natural community that we live in through interactive exhibits, storytelling and they even have a section that includes eco-friendly children's products.
The festival is held at Glendale Gardens and Rocky Mountain Soap is located in The Village area. Advance tickets can be had for a 25% discount online at organicislands.ca or at Rocky Mountain Soap in Mayfair Shopping Centre. Come on out and enjoy the robust program of seminars, product demonstrations, music and panel discussions - fun for the whole family. LIVE GREEN. DO GOOD.


10 June 2009

So what's wrong with SLS?

There is a fair amount of misinformation out there with respect to SLS (sodium lauryl sulfate) and its relatives as to why it should be avoided. The big one is that it apparently causes cancer. There is no peer-reviewed data that suggests that it is carcinogenic. At worse, these chemicals are strong skin irritants, and of course not natural. Upon closer examination though, we find that this is not the only story.

SLS belongs to a group of chemicals called surfactants. These lower the surface tension in liquids, allowing them to spread more easily, and in the case of soaps and shampoos, to make lots of foaming bubbles. There are a variety of surfactants used in bath and body care products, some of the more common ones being:
  • SLS (sodium lauryl sulfate)
  • SLES (sodium laureth sulfate)
  • ALS (ammonium lauryl sulfate)
  • SDS (sodium dodecyl sulfate)
  • SMES (sodium myreth sulfate)
  • BAC (benzalkonium chloride)
  • Cocamide DEA and MEA
  • Cocamidopropyl betaine
These are often made with coconut oil (or other natural vegetable oils) as the base and so you may see something like "derived from coconut" on the label. That should be a red flag and warrants further investigation. It is what they do to the coconut oil that is of concern. The oil is ethoxylated, that is, to put it simply, reacted with ethylene oxide and a strong base such as potassium hydroxide (KOH), to produce the surfactant. Ethylene oxide is produced from the hydrocarbon ethene (ethylene) - an obvious petrochemical. This is where the problem comes in. A by-product of ethoxylation is 1,4 dioxane, a potent carcinogen. It is the unintentional by-product that is the carcinogen, not the foaming agent itself, such as SLS. Nonetheless, if 1,4 dioxane is found in your personal care products, this is probably not a good thing.

That being said, it is probably a good idea to check your shampoo, lotion, toothpaste brand to be sure that if it does contain a surfactant, like the ones above, that independent testing has at least shown that it is not also contaminated with 1,4 dioxane. Additionally, because these surfactants are very strong skin irritants, its use, by people with sensitive skin and/or some form of contact dermatitis such as eczema, would seem to be contraindicated, and thus avoided.

01 June 2009

Farmer's Market

We've been asked to participate in a farmer's market, to be held here every Wednesday from 4pm at the Mayfair Shopping Centre, right through to September. I was hesitant at first, but someone pointed out that Rocky Mountain Soap products are all natural and hand-made, often from the very same natural ingredients one finds at a farmer's market.
A little research confirms that farmer's markets in BC are plentiful and increasingly popular. I was surprised though to find that they have a large economic impact, to the tune of 3.1 billion dollars in BC. That's a lot of lettuce, onions and hand-made soap. And beyond the economic impact, it is somehow satisfying to buy products direct from the people that had a hand in making them, growing them, creating them. Connecting with like-minded individuals is also an added bonus. Speaking of which, if you are in the Victoria area, check out Green Drinks, an informal network of green-minded people connecting together to share ideas. They also have other groups in other cities internationally.

If you are in the area on Wednesdays, June through Sept from 4 to 8pm, stop by and ask for a soap sample. We will probably be cutting soap, chatting with the other vendors or at the very least sun-tanning our toes.

28 May 2009

Essential Oil Extraction

It is pretty common in the bath and body products industry to go natural these days. One of the ways that companies have found successful is to eschew fragrances and perfumes, which are, by and large, synthetic and opt instead for essential oils. This results in not only a more natural end-product, but one that is often more delicately scented. However, before we can use essential oils in soaps, lotions, perfumes or other cosmetics, we have to extract them from the source plant, whether it be lavender, chamomile or vanilla. The extraction method has an effect on the essential oil - it can change it, or even contaminate it, in which case the claim of natural cannot be maintained.

There are a number of ways in which essential oils can be extracted. All, except expression are solvent based, however we will separate them out, and refer to the solvent method as using something unnatural, resulting in solvent residue.

Distillation refers to water or steam distillation. The base plant material is permeated with water and essentially boiled at 100 degrees C. Similarly in steam distillation, steam is injected, often under pressure to separate the essential oil from the plant material. This happens at temperatures above 100 degrees C. Because of this, constituents in the essential oils can often decompose into oxidative products. However, this process is considered to be natural and the yield is high, little is wasted.

Expression is often referred to as 'cold pressed'. Olive, coconut and avocado oils are often cold pressed. No heat is used, so volatile constituents remain unchanged. Yield can be low though, so this is often not a very efficient or cost effective method. There are several methods of expression that we won't go into here, but citrus oils are uniquely suited for this extraction method.

Supercritical CO2 is carbon dioxide above 31 degrees C and under extreme pressure (>72.9 atmospheres) that is used as a solvent. The supercritical CO2 bonds with the essential oil constituents in the plant material and extracts them. When the pressure is removed, the CO2 simply evaporates, leaving the pure essential oil. Since no heat is employed, the essential oil is unrefined and in its natural state. Often the scent, potency and crispness of the essential oil are enhanced as compared to steam and water distillates, scenting more closely to the original plant. While more expensive, the essential oil often goes further. The oils produced by this method are, like those extracted through expression, the purest and most natural.

Solvent extraction for our purposes here is where an organic, but not necessarily natural, solvent such as alcohol, petroleum ether or hexane (among others) is used. Often used because of cost effectiveness, it is also used for very delicate essential oils or where the essential oils are found in very minute quantities, such as rose or jasmine. This type of extraction produces a waxy substance called concrete. This concrete is then heated and dissolved into alcohol. This is then distilled in a vacuum, resulting in an absolute. Absolutes are generally very expensive. The problem for the natural community is that after extraction, quantities of the solvent may remain, often in large percentages. Hexane extraction leaves 8-10 ppm of hexane (a petrochemical) in the essential oil. This method is not viewed in the natural community as being natural and is avoided by those companies that are truly committed to natural products.

It is important to know the extraction method of an essential oil to determine not only its quality but if it can still be considered a natural product. Essential oils on an ingredient list do not guarantee natural and are often used in greenwashing exercises. The good news is that the demand for really natural products by consumers has opened up essential oils to serious scrutiny.

18 May 2009

Avocado Oil

We hear a lot about the benefits of this oil or that oil in personal care products. One such oil that I have noticed popping up lately is avocado (Persea americana). So what's good about avocado, besides being delicious in salad or guacamole? Avocado oil is similar to olive oil in that it is not derived from the seed; rather, it is pressed from the flesh around the pit - and strictly speaking it is a fruit oil, very thin and therefore deep penetrating. It is a rich emollient with high concentrations of oleic, linoleic and alpha-linolenic fatty acids. There are many claims that it is also very rich in potassium, vitamins A, B6, C, D, E and K among others. This does not seem to be entirely truthful and much depends upon how the oil is extracted. It certainly does contain A and E as investigated by Bastista et al. Regretfully, many natural cosmetics companies have used avocado data interchangeably with that of avocado oil - there is a difference.

Extra virgin avocado oil is cold pressed (non-virgin being heat and solvent extracted) - which means that the avocado is mechanically pulverised, the resulting constituents decanted and centrifuged. This should leave you with a green coloured oil, because of the remaining chlorophyll. Unfortunately, this sometimes undergoes the refined bleached and deodorised (RBD) process which removes natural peroxides and chlorophyll, leaving a highly stable, but tasteless and pale yellow oil. This is usually done through the use of solvents and high temperatures. Do you know how that avocado oil, that you are using in your cosmetics or on your salad, is processed? Are the benefits still there?

In my opinion, besides the incredible moisturising value of avocado oil, the two most exciting properties are those of the unsaponifiable components and glutathione. Unsaponifiable constituents seem to inhibit lysyl oxidase activity and thus cross-linking in collagen - resulting in better skin tone, texture and strength. Glutathione, an amino acid with incredible anti-oxidant properties recharges spent vitamins C and E, neutralises free-radicals, is critical to the immune system and even assists in DNA repair. Unfortunately, glutathione levels decrease as we age. Thus, since your skin is a huge sponge, what better to moisturise with than avocado oil, and at the same time reap these added benefits.

References:

Batista Cedeño, A., et al (Persea americana, M). Valor nutricional y composición. Alimentaria, 1993; 63: 63-69.

AvocadoSource.com