Lye, also known as sodium hydroxide or caustic soda, is a strong alkali commonly used in industrial settings for various purposes, including soap and detergent production. That is why we don't use them in our shampoo bars.

Lye can be highly caustic and can cause hair and scalp irritation, as well as burns if used improperly or in high concentrations.

Lye shampoo bars, sometimes referred to as "no-poo" or "soap-based" shampoo bars, are a type of hair cleanser that typically use lye as a main ingredient. These shampoos are often marketed as natural or chemical-free alternatives to conventional shampoos. They are made by saponifying oils or fats with lye, resulting in a soap-like substance that can be used for washing hair.

However, lye shampoo bars can have some drawbacks.

One of the main concerns is that the high pH of lye can disrupt the natural pH balance of the scalp, which is typically slightly acidic. This disruption may lead to dryness, scalp irritation, and other hair and scalp issues. Additionally, lye shampoos may not effectively remove certain hair products, such as silicone-based conditioners or styling products, which can lead to buildup over time.

It's important to note that not all lye shampoos are created equal, and some may have formulations that are more gentle or balanced in pH. If you are considering using a lye shampoo, it's advisable to research the specific product, read reviews, and consult with a dermatologist or trichologist (hair and scalp specialist) to determine if it's suitable for your hair and scalp condition.

Ultimately, the choice of shampoo depends on personal preference, hair type, and specific needs. There are many alternative shampoos available on the market that can effectively cleanse the hair without the use of lye.