Lanolin

What is it?	The refined waxy substance removed from sheep’s wool.
INCI	Lanolin
Appearance	Thick, yellow ointment-like (semi-transluscent) pastey goo.
Usage rate	Up to 100%
Texture	Thick, greasy, sticky
Scent	Heavy, oily, sort of musty—typically described as “characteristic”
Absorbency Speed	Slow
Approximate Melting Point	40°C (104°F)
Solubility	Oil
Why do we use it in formulations?	Lanolin is a wonderful skin protectant, moisturizer, softener, and occlusive. I enjoy including it in products where an ointment-y consistency is needed.
Do you need it?	No
Refined or unrefined?	You’ll typically find Lanolin Anhydrous USP (United States Pharmacopeia grade), and that stuff is great.
Strengths	It’s an excellent moisturizer and helps boost skin barrier repair.
Weaknesses	The smell can be unpleasant, it isn’t vegan, it can be sticky.
Alternatives & Substitutions	Hydrogenated castor oil has a similar consistency and would probably be my first choice for a substitute; otherwise, a soft butter would be a decent alternative.
How to Work with It	Include in your heated oil phase or cold blend into anhydrous products—it does not need to be melted, but can be.
Storage & Shelf Life	Stored somewhere cool, dark, and dry, it should last 1.5–2 years.
Tips, Tricks, and Quirks	It can hold up to 50% its weight in water!
Recommended starter amount	100g (3.3oz) or less (think about how much you like greasy stuff!)
Where to Buy it	Buy it from an online DIY ingredient supplier or Amazon.