Colloidal Oatmeal

What is it? Colloidal Oatmeal is an ultra-fine, very refined oat flour made from whole oats (including the beneficial bran). It’s a moisturizing skin protectant, recommended for soothing irritated skin. It is not the same thing as hydrolyzed oat protein, and it’s not the same thing as oats you’d grind up at home. Definitely give this article a read to learn more as there are some funny oddities and intricacies.
INCI Avena Sativa Kernel Flour
Appearance Fine off-white powder; looks a lot like all-purpose flour.
Usage rate I’ve found wildly varying ranges. New Directions Aromatics recommends 0.05–2% while Making Cosmetics recommends 5–30%. I tend to use it in the 1–5% range for emulsions, and higher for anhydrous products like bath soaks and cleansing powders.
Texture Fine, smooth powder
Scent Low; slightly oaty, but barely noticeable.
Solubility I’ve found it listed as water-soluble and minimally soluble. In my experience, colloidal oatmeal does not dissolve in water but is so fine that it disperses smoothly in emulsions.
Why do we use it in recipes? Colloidal oatmeal is a great anti-inflammatory/soothing moisturizer, making it great for dry, irritated skin.
Do you need it? No, but I love colloidal oatmeal as a versatile, gentle skincare active.
Refined or unrefined? Colloidal oatmeal only exists as a refined product.
Strengths Excellent skin-soothing moisturizer, all-natural, inexpensive.
Weaknesses If you have a topical sensitivity to gluten there is a chance of cross-contamination.
Alternatives & Substitutions Panthenol is both soothing and moisturizing, so it could be a good alternative. You could also look at combining something soothing (like calendula extract) with something moisturizing (glycerin, propanediol, hydrolyzed proteins, etc.). Urea is also worth considering.
How to Work with It Colloidal oatmeal can be hot or cold processed. In emulsions, include it in the water phase.
Storage & Shelf Life Stored somewhere cool, dark, and dry, colloidal oatmeal can last up to two years.
Tips, Tricks, and Quirks Check out this interesting article on the intricacies and oddities of colloidal oatmeal from LisaLise.
Recommended starter amount 30g (1.06oz)
Where to Buy it  Buy it from an online DIY ingredient supplier or Amazon.

Some Recipes that Use Colloidal Oatmeal

Cholesterol

What is it? Cholesterol is a fatty sterol that works as a wonderful emollient. It is extracted from lanolin.
INCI Cholesterol
Appearance Fine white powder
Usage rate 1–10%
Texture Smooth powder
Scent Mine smells distinctly of lanolin, though I don’t notice it in finished formulations.
Approximate Melting Point 147–150°C (297–302°F)
Solubility Oil
Why do we use it in recipes? Cholesterol is an excellent emollient for irritated/damaged skin and hair. It also helps support/repair barrier function. It can also help stabilize emulsions and thicken products.
Do you need it? No.
Refined or unrefined? Cholesterol only exists as a refined product.
Strengths Cholesterol is an easy-to-use additive that is wonderful for the skin.
Weaknesses Cholesterol is not vegan, and the smell may put off those with sensitive senses of smell.
Alternatives & Substitutions Lanolin would likely be your best bet. Liquid lecithin or Brassica Campestris Aleurites Fordi Oil Copolymer could be decent vegan alternatives. Keep in mind that all of these options will be significantly less potent than pure cholesterol, so you may wish to alter the formulation to include more of the replacement ingredient to compensate.
How to Work with It Include in the oil phase of your formulations. It can be hot or cold processed.
Storage & Shelf Life Stored somewhere cool, dark, and dry, cholesterol should last 24 months from the time of manufacture.
Tips, Tricks, and Quirks I first used cholesterol in this formulation from The Acid Queen. Check it out!
Recommended starter amount 30g (1.06oz)
Where to Buy it  Buy it from an online DIY ingredient supplier or Amazon.

Some Recipes that Use Cholesterol

Coenzyme Q10 (Ubiquinone)

What is it? Coenzyme Q10 (Ubiquinone) occurs naturally in the human body. It is a vitamin-K-like substance with very strong antioxidant properties, and is commonly used in anti-aging skincare products. It can help prevent collagen breakdown and prevent/repair UV damage.
INCI Precise INCI values vary with the exact product you have. Liquid Ubiquinone is usually dispersed in some sort of carrier, so there will usually be some additional ingredients. The powdered version have have an INCI of just Ubiquinone.
Appearance Yellow to orange liquid or powder
Usage rate Varies with format; check with your supplier. Most ranges I’ve seen are below 4%, with the powder format on the lower end and the diluted liquid formats on the higher end.
Texture Depends on the format
Scent Nothing noticeable
Approximate Melting Point 48–52°C (118–126°F)
Solubility Oil, ethanol
Why do we use it in recipes? Coenzyme Q10 (Ubiquinone) is primarily included in formulations for its anti-oxidant, skin conditioning, and anti-aging properties.
Do you need it? No
Strengths It’s an excellent antioxidant and has great label appeal. It can help repair sun damage (including wrinkles caused by UV exposure) and increase skin cell turnover.
Weaknesses It’s fairly expensive.
Alternatives & Substitutions I’d start by looking at other ingredients that are also strong antioxidants, like vitamin E (tocopherol acetate).
How to Work with It Pre-dispersed liquid versions can be easier to work with as Coenzyme Q10 (Ubiquinone) is not very enthusiastically oil soluble.

Lotion Crafter recommends including powdered Coenzyme Q10 (Ubiquinone) in the heated oil phase of emulsions to ensure proper incorporation.

I would recommend adding pre-dispersed liquid Coenzyme Q10 (Ubiquinone) products in the cool down phase given the low usage rate, but defer to your supplier recommendations for the precise product you are using.

Storage & Shelf Life Stored somewhere cool, dark, and dry, the powder version should last up to 36 months.
Tips, Tricks, and Quirks Soybean oil contains a good amount of Coenzyme Q10 (Ubiquinone), with 54–280mg/kg.
Recommended starter amount 15g (0.5oz)
Where to Buy it  Buy it from an online DIY ingredient supplier. As of 2019 the product I have is “Coenzyme Q10 – Q-MAX” from Lotion Crafter.

Some Recipes that Use Coenzyme Q10 (Ubiquinone)

Caffeine

What is it? Caffeine is a stimulant, commonly found in coffee and tea.
INCI Caffeine
Appearance Fine white powder
Usage rate 0.1–1%
Scent Nothing very noticeable
pH 6.9 (1% solution)
Solubility Water
Why do we use it in recipes? Caffeine increases circulation and reduces puffiness, making it a popular ingredient in products for mature skin and under-eye applications. It can also help reduce water retention, creating a slimming effect.
Do you need it? No
Refined or unrefined? It is best to purchase isolated, concentrated caffeine.
Strengths Very effective de-puffing active.
Weaknesses Not a good choice for anyone sensitive to caffeine.
Alternatives & Substitutions I don’t know of anything terribly suitable; there are some caffeine extracts made from ingredients that contain caffeine (like tea or coffee) that are less concentrated than caffeine powder. If you want to use a plant extract instead of pure caffeine powder you will need to use more; the usage rate for caffeine is really low (0.1–1%) because it’s really concentrated, while the plant extract will not be. Please review the documentation provided for your extract to see what the recommended usage rates are, and adjust the amount called for to line up with the effective range of your extract; I would probably go with the maximum recommended usage rate as the extract contains caffeine, but isn’t pure caffeine.

Because caffeine is water soluble, replacing it with oils made from or infused with things that typically contain caffeine (coffee, tea, etc.) is not a good option—the amount of caffeine present is typically very low, while you may find the coffee scent to be very strong!

How to Work with It Include in the water phase of your formulations; it can be hot or cold processed as needed.
Storage & Shelf Life Stored somewhere cool, dark, and dry, caffeine should last approximately four years.
Tips, Tricks, and Quirks I’ve heard stories from people who have applied large amounts of caffeine creams before going to bed and then being unable to sleep, so tread lightly with pre-bedtime applications!
Recommended starter amount 10g (0.35oz)
Where to Buy it Buy it from an online DIY ingredient supplier or Amazon.

Some Recipes that Use Caffeine

Bisabolol

What is it? Bisabolol (more specifically, α-bisabolol) is a naturally occurring antioxidant, soothing, anti-inflammatory, and anti-irritant ingredient. It can be sourced naturally or synthesized; the naturally occurring version is more active than the synthesized version. Natural sources include chamomile essential oil, panama plinia, and salie.
INCI Bisabolol
Appearance Clear to pale yellow liquid
Usage rate 0.1–1%
Scent Weak floral scent
Solubility Oil
Why do we use it in recipes? Bisabolol offers soothing and anti-irritant properties to our formulations.
Do you need it? No
Refined or unrefined? I would recommend the natural version as it is more active than the synthesized version.
Strengths Excellent soothing ingredient at low concentrations.
Weaknesses Not very commonly available.
Alternatives & Substitutions Chamomile essential oil or an oil-soluble calendula or chamomile extract would be a good place to start. Check the bisabolol content in your chamomile essential oil to see how much bisabolol you’re getting and consider adjusting if necessary.
How to Work with It I typically include it with the essential oil blend in a formula, adding it during cool down.
Storage & Shelf Life Stored somewhere cool, dark, and dry, bisabolol has a stated shelf life of 24–36 months after manufacture (check with your supplier for details on what you’ve purchased).
Tips, Tricks, and Quirks Try including up to 1% bisabolol in your formulations for an anti-inflammatory boost.
Recommended starter amount 10mL (1/3fl oz)
Where to Buy it  Buy it from an online DIY ingredient supplier or Amazon.

Some Recipes that Use Bisabolol

Niacinamide (Vitamin B3)

What is it? Niacinamide is “an amide derivative of nicotinic acid“, also known as Vitamin B3.
INCI Niacinamide
Appearance White powder
Usage rate 1–6%, though I’ve seen higher concentrations in store bought products
Scent Nothing much
Solubility Water
Why do we use it in recipes? Niacinamide is a fantastic skin care active! It helps down regulate sebum production, reduce inflammation, decrease acne lesions, increase the synthesis of ceramides, reduce transepidermal water loss (TEWL), reduce fine lines, fade age spots and hyperpigmentation, and brighten the complexion.
Do you need it? No
Strengths Highly effective, well-researched skin care active with many benefits.
Weaknesses While it is usually well tolerated, it can be irritating to some. It can also be problematic in very acidic formulations as it can break down into niacin, causing flushing and irritation.
Alternatives & Substitutions Nothing is a complete substitution. Panthenol (vitamin B5) plays some of the same roles and can be a decent alternative. You could also try choosing a botanical extract that has comparable properties depending on what you are trying to achieve. A humectant or hydrolyzed protein could also be a decent choice.
How to Work with It Include it in the water phase of recipes. I’ve found varying recommendations for the final pH of the product; it’s typically around 6, but Amanda at Realize Beauty and Stephen at Kind Stephen have articles on on how and why a lower final pH is also likely to be ok.
Storage & Shelf Life Stored somewhere cool, dark, and dry, niacinamide should be shelf stable for up to three years.
Tips, Tricks, and Quirks If you want to try niacinamide in your skin care routine before investing in the raw ingredient I would highly recommend The Ordinary’s 10% Niacinamide + 1% Zinc formulation. It has absolutely revolutionized my skin and it’s under $6!
Recommended starter amount 10–30g (0.35–1oz)
Where to Buy it  Buy it from an online DIY ingredient supplier.

Some Recipes that Use Niacinamide

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