The Skin

Let's talk about our largest organ. THE SKIN! 
Fun facts:

• The skin is part of the integumentary system which comprises the hair, skin, nails, specialized glands and nerves.
• The skin is the largest and heaviest organ- it comprises 16% of your bodies weight, (bonus fact- the liver is the second largest and heaviest).
• The skin is a barrier, a thermostat, a sensor, a factory and a window.
• The skin can be broken down into 3 major layers with minor layers living within those layers
• the epidermis, dermis and hypodermis
• The epidermis has 5 layers (stratum corneum is the top most layer with stratum lucidum, stratum granulosum, stratum spinosum and stratum basale following deeper and deeper.)
• The has 2 layers and it's main job is to connect the epidermis to the hypodermis and provide structure and support (papillary layer and connective tissue are it's 2 layers)
• The hypodermis has one layer it's job is to provide insulation and support.

Alright- let's break this all down! I am going to focus on the epidermis because that is the part that is most directly affected by skin care products.

The skin is a barrier. I am going to repeat this THE SKIN IS A BARRIER, it is NOT a sponge. Every time I see someone write this on FB or say it I die a little bit on the inside. If the skin were a sponge we would drown every time we took a shower or bath. 

The skin is a waterproof barrier that seals the body from losses of fluid that could lead to dehydration and death. It resists invasions by various types of microorganisms such as bacteria, fungi and viruses that cause infection and serious illness. The skin also blocks many chemicals and allergens from entering the body.

The skin is a thermostat. The skin has the ability to help cool you down or keep you warm, it works in conjunction with the blood vessels to do this. 

The skin is a sensor. It has millions of receptors and nerve endings. There are different types of receptors which perceive different stimuli.

The skin is a factory. The skin is the body's vitamin D production factory. We need vitamin D to build healthy bones a strong immune system which will in turn fight cancers and other diseases as well as mitigate depression and even multiple sclerosis.

The skin is a window. How you feel inside directly affects how your skin can look. If you are happy and healthy and internally balanced it will be reflected in your skin. If you are stressed, anxious, depressed or have some internal health issues it can be reflected by way of skin flare-ups, disease processes, brittle nails and hair. People with eczema and psoriasis tend to have flare-ups when they are stressed or having diet issues.* 

Let's talk epidermal layers!

Stratum corneum- contains 15-20 layers of dead skin cells that ultimately slough off.

Stratum lucidum- this layer is mainly found on thick skin like the palms of the hands and soles of feet, it contains dead keratinocytes.

Stratum granulosum- keratin and lipids that waterproof the skin are produced in this layer

Stratum spinosum- synthesis of keratin proteins begins in this layer

Stratum basale- the cells of this layer divide indefinitely to form daughter cells that rise through the epidermis. Basal cell cancers arise from this level.

Skin and skin care products. Some ingredients can absorb into the deeper layers of the epidermis, these are called active ingredients. Cosmetic chemists often talk about the penetration abilities of ingredients. This is what they are referring to. 

Other ingredients can absorb even deeper, sometimes because of the penetrative abilities and what they can accomplish on a deeper level these products fall into the category of being a drug and must be tested and approved through the FDA, by the way, sunscreen falls into this category, never buy sunscreen that is not FDA approved, you have no idea if it will actually provide the protection that it claims otherwise. On a side note, at this time, there is only one approved CBD topical that has been proven to penetrate deeply and be effective for bone and joint pain. Consider this if you are in the market for a CBD topical that you want to penetrate deeply. 

Some products sit on top of the skin and work their magic at that level, many handcrafted skin care items fall into this category. (some makers do use active ingredients and have products that penetrate deeper.) At the time of writing this post SOAPSMITHS products do not contain any actives nor do they fall into the category of a drug. 

Hard Cider Soap by Soapsmiths

When formulating products I take into consideration what I am trying to achieve. If I am making soap I need it to clean. THAT IS IT! If someone gives you a song and dance about other properties their soap has just smile and nod because you now know that it only cleans and as a wash off product it most likely does nothing else. The second someone claims any differently their soap becomes either a cosmetic or a drug and they could be up a creek without a paddle if the government folks catch wind of it.

Sugar Scrub by Soapsmiths

When formulating a scrub I want it to exfoliate those dead Stratum corneum cells so that the lotion that I will apply after can hydrate and protect the layers of skin that were under them.

Cocoa Mint Creme by Soapsmiths

When creating a lotion I want it to hydrate and protect. The best way to do this is to use a combination of oils and waxes which will both sit on top of the skin forming an occlusive barrier while also hydrating those top most layers. A product like a lotion is really the place to add special ingredients which may improve skin barrier function. The only way to really know would be to submit it for testing. Most small makers don't have the financial means to do this so we take our ingredient and formulating knowledge and build a product based on what we know. 

So there you have it. The skin is an amazing giant organ which keeps good things (like our organs and fluids) in and bad things (bacteria, yeast, fungi, etc.) out! Treat it well and you two should have a long and prosperous life together.

TED talk link all about the skin.

I also referred to the Reader's Digest Guide to Skin Care by Susan C. Taylor, M.D. and Victoria Holloway Barbosa, M.D.

Additionally I popped over to a blog called the Chemists Corner for information on the penetration of ingredients. https://chemistscorner.com/penetration-of-cosmetic-ingredients/

* Regarding my comment on eczema and psoriasis, if you are having trouble with skin conditions please seek professional medical advice, I am not trained in human medicine and do not make any claims or diagnoses with what I write.

~Yours in scientific musings

'Smithy

The pH of hair, skin and products (and why it matters!)

Good morning Soapsmith Nation! I have been thinking a lot about pH lately (I think about it all the time really). At a recent market I was chatting with a customer and he asked if I made any bar soaps that were anti-bacterial. "Of course I do, actually all handmade bar soap is anti-bacterial," I explained to him, "but I don't need to add anything to make them that way." He looked puzzled until I explained that the natural pH of handmade soap is typically around 10 and in that type of alkaline environment bacteria, mold, yeast, fungus etc. do not survive. He seemed grateful for the simple explanation and told me that of all the soap vendors there that night (I was 1 of 4) not one of them had been able to articulate that information to him. I felt flattered and super nerdy (which I wear like a badge of honor) to have been able to help him out.

Let's back up a second. What is pH and why do I think about it non-stop? Simply put pH, or potential hydrogen, is a scale of acidity from 0 to 14. It tells how acidic or alkaline a substance is. More acidic solutions have lower pH of between 1-6.9. More alkaline (aka basic) solutions have higher pH at 7.1-14. Substances that aren't acidic or alkaline (that is, neutral solutions) usually have a pH of 7 (pure water has this pH). Why do I think about it non-stop? I take pH into consideration when creating products and need to decide if it is appropriate for the skin which it will be used on. Some products have a pH which may not match the pH of skin exactly so then I must further ponder if it will throw the pH too far out of balance and if I need to adjust the product to be more compatible, (see....super nerd here, ha). One last note about pH is that between 2 whole numbers are 10 fractions of a number. Example between pH 5 and pH 6 are all the fractions of 5.1, 5.2, 5.3, and so on. So when I say your skins pH is 5.5 that is 5 fractions away from pH 6 instead of a half of a fraction. pH 5 to pH 6 is 10 times the difference from one to the next and pH 4 to pH 6 is 100 times different (10 x 10)! Long story short, the distance between one whole number and the next is much longer than it appears on the surface.

The pH of our skin is 5.5 and the pH of hair is between 4.5-5.5 with virgin hair being even lower at 3.67. As we now know, the pH of handmade soap is around 10. Is this a bad thing? Well let's consider a couple of things first. The layer that we are affecting by washing, scrubbing, exfoliating and later moisturizing with lotion is called the "acid mantle" it can take anywhere from 15 minutes to 14+ hours to repair itself depending on the level of damage incurred. If your skin is feeling tight your acid mantle may have been negatively impacted by something. We want this to be balanced and functioning properly because it keeps bad things like bacteria, yeast and fungi out and good things like fluids in. Some skin is thicker than other skin on the body, this is good to know when deciding what to use on your body. The skin on your face is very thin (0.5mm on your eye lids) to thicker (4mm on the soles of your feet). The different parts of your body can handle different amounts of stressors and reset faster keeping your acid mantle in check. With that being said, I will be the first person to tell you that I no longer use my handmade soap to wash my face. As I have aged I noticed more frequently that my face skin felt tight and that's not how it should feel. When I went to get a facial the esthetician told me that my skin on my face had been stripped of its natural oils and was in need of repair. I knew what that meant, it was time to switch to a pH appropriate gentle facial cleanser. My face skin is clear, bright and no longer tight (although it hurt my heart to have to stop using my own soap to wash my face.) I still use my soap on the rest of my body and don't have issues with dryness or tightness so the thicker skin seems to be able to reset in a reasonable amount of time and to keep the bad things out and good things in for me:).

While the skin can reset itself in due time the hair cannot. I NEVER, NEVER, NEVER, recommend handmade soap be used on hair. Many people claim that it works great and their hair feels good and a simple apple cider vinegar rinse is all their hair needs and that's fantastic for them but what they don't realize is that when they use handmade soap on their hair it causes the hair shaft to swell exponentially and the cuticle to lift. If you have colored hair this is even worse because it will cause your color to fade faster. Even if you do not have colored hair all those little cuticles get tangled together and can cause breakage and a frizzy appearance. Some soapmakers claim they have a special and gentle formula for hair, I am not here to debate or knock another maker but I will say that scientifically there is no way to bring the pH of handmade soap down low enough to be appropriate for hair without destabilizing the formula which in the end makes a puddle of ingredients as opposed to making a bar of soap. Even liquid soap made with KoH is alkaline and inappropriate for hair care.

I have been fascinated by shampoo and conditioner bars lately I love that they help to reduce plastic waste, they are great for travel and last for quite awhile. I have been exploring ingredients which have a more appropriate pH for the skin and hair, bring in the LAB CREATED INGREDIENTS (imagine trumpets here). Look, just because something is "natural" doesn't automatically make it safer than something made in a lab. Snake venom is natural but deadly. Sodium Cocoyl Isethionate is a coconut derived gentle surfactant with a pH of 4.5-6.5. Lab made ingredients are stable and consistent which is a huge benefit to them, also they do not deplete natural resources as some naturally derived ingredients do.

Shampoo Bars by Soapsmiths

Over the past 6 months I have developed a formula for a shampoo bar that is pH appropriate for hair and skin. I have been lovingly calling it "The everything bar" because it can be used on, well, everything! I wash my hair with it and sometimes my body, it's actually fabulous for shaving too! It leaves me feeling silky and my hair is not frizzy or tangled either. I used lab made ingredients and have been checking in with cosmetic chemists that I am familiar with to ensure that my formula is correct and appropriate. My faithful group of testers have had really positive feedback on these bars and one tester even went ahead and bought an additional 2 so she would have them! I am currently working on a conditioner bar, and hope to get it into my testers hands soon so that I can then share it with you all.

So this is the long and short of pH and why it is important. In researching this information for the post I have decided to create a post on the skin where we will dive deeper into the various layers and what they do so stay tuned for more science-y fun.

Until then, stay bubbly my friends
~Your Soapsmith