Beeswax, propolis, vitamin E: what are they actually doing in your lip balm?

Start with your lips. The outer layer of skin there is only a handful of cell layers thick, far thinner than on the rest of your face. Lips have no sweat glands and almost no oil glands, so they can’t produce a protective film of their own.

That makes them one of the few places on your body that depend almost entirely on what you put on them. And here’s the part people rarely think about: some of whatever you put on your lips, you end up swallowing over the course of the day.

So it’s worth knowing what’s in your balm. Three ingredients in particular have been used for centuries, and each one does a very specific job.

Beeswax is produced by young worker bees, which secrete it as tiny flakes from eight glands on the underside of their abdomen. To make one pound of wax, a colony is estimated to consume 6 to 8 pounds of honey.

Chemically, beeswax is a mix of more than 300 compounds, mostly wax esters. It melts at around 145°F (63°C), well above body temperature, so it gives a balm structure instead of melting away. On the lips, it forms a flexible film that slows down water loss. It’s semi-occlusive: lighter and less greasy than petroleum jelly, which in one widely cited study cut water loss from skin by more than 98%.

People figured this out a long time ago. Around 150 AD, the Greek physician Galen made one of the first known cold creams from beeswax, olive oil and rose water. Beeswax is even an approved food additive, E901, used to give fruit and candy their shine.

The name comes from the Greek “pro” (before) and “polis” (city): the defender of the city. Bees make propolis from resin they collect from tree buds and bark, then mix it with wax and use it to seal every crack in the hive.

Here’s the part that surprises people. When a mouse gets into a hive and dies there, it’s far too heavy for the bees to carry out. So they coat it in propolis and seal it in, which keeps it from decaying inside the hive. Researchers have identified more than 300 compounds in propolis, many of them plant flavonoids and polyphenols studied in the lab for their antioxidant properties.

An honest caveat: that research is about propolis itself, not about finished lip balms. In a balm, propolis is a traditional, comforting ingredient, not a treatment. And anyone allergic to bee products or propolis should avoid it.

Vitamin E was discovered in 1922 by researchers Herbert Evans and Katharine Bishop, who found that rats couldn’t reproduce without a compound found in certain foods. That’s where its chemical name comes from: tocopherol, from the Greek for “childbirth” and “to carry”.

Today we know “vitamin E” is a family of eight related compounds. Your skin naturally contains it, and much of it reaches the surface through the skin’s own oils. Lips barely produce those oils, so they miss out. In a balm, vitamin E conditions the lips and works as an antioxidant that stops the oils and waxes in the formula from going rancid.

One last label tip: in the US, ingredients are listed from most to least, down to 1%. Below that, any order is allowed. Look for “Cera Alba” (beeswax), “Propolis Extract” and “Tocopherol” (vitamin E).