Learn Formulation

Most skincare products contain both oil and water. Lotions, creams, and conditioners all rely on a combination of these ingredients to moisturize and protect the skin. But oil and water naturally separate. If you pour oil into a glass of water, the oil floats on top. Even if you shake the mixture, it quickly separates

Surfactants are one of the most important ingredients used in skincare and haircare products. They are responsible for cleansing the skin, removing oil and dirt, and helping products rinse away easily with water. If you’ve ever used a facial cleanser, shampoo, or body wash, you’ve already experienced the effects of surfactants. Despite how common they

If you’ve ever found a skincare recipe that makes 100 grams but you want to make 500 grams, you’ve probably wondered how to know exactly how much of each ingredient to use. This is where percentages come in. Understanding the difference between percentages and grams is one of the most important skills to learn when

If you make your own lotions, creams, body washes, scrubs, masks, or other skincare products, understanding preservatives is one of the most important parts of learning how to formulate safely. Whenever a product contains water or other water-based ingredients, microorganisms such as bacteria, yeast, and mold can potentially grow. A product can look and smell

One of the biggest lightbulb moments in DIY skincare is realizing that water and oil don’t play the same role — and they’re not interchangeable. If you’ve ever wondered: …it all comes back to water vs oil. Understanding how these two phases work — and how they work together — is foundational to confident skincare