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What Is Soap Scum and Why Does It Form? The Che...

Soap scum is one of the most universally despised bathroom cleaning problems. The white, filmy residue that forms on shower walls, glass doors, and fixtures is familiar to anyone who...

What Is Sodium Lauryl Sulfate and Why Is It in ...

Sodium lauryl sulfate appears on the ingredient list of most commercial soaps, shampoos, toothpastes, and body washes. It produces the abundant lather that consumers associate with effective cleaning. It is...

The Best Natural Soap Gifts for Athletes: What ...

Gift-giving for athletes is notoriously difficult. Most people default to gear, but gear is personal — athletes have opinions about their shoes, their watches, their packs. The wrong gear is...

The Skin Microbiome and Natural Soap: Why What ...

The skin microbiome — the community of bacteria, fungi, viruses, and other microorganisms that live on skin — is one of the most important and most recently understood dimensions of...

The History of Soap: From Ancient Babylon to Na...

Soap has been made and used by humans for at least 4,800 years. Its history spans ancient Babylon, Roman baths, medieval Europe, and the industrial revolution that transformed it from...

What Is Superfatting in Soap? Why It Determines...

Superfatting is one of the most important concepts in natural soap making, and one of the least understood by soap buyers. It directly determines how a finished soap feels on...