By Melissa, formulation chemist, Lone Tree Tallow
Short answer: An exosome is a tiny messenger. Cells send exosomes out to pass signals to other cells. In skincare, exosomes are used to signal fresher, smoother, brighter-looking skin. They are not stem cells. They are not alive.
What is an exosome, in plain English?
Think of your skin cells as neighbors who text each other.
Exosomes are the texts.
They are tiny bubbles, far smaller than a cell, that carry proteins, lipids and other signals from one cell to the next.
Are exosomes the same as stem cells?
No. This is the question we get most.
- A stem cell is a living cell.
- An exosome is a message a cell sends out.
There are no cells in an exosome serum. Just the messengers.
What do exosomes do for skin?
The messengers that keep skin looking renewed slow down with age. An exosome serum sends in fresh ones.
With steady use, what you will see:
- Fine lines look softer.
- Skin looks smoother and more even.
- A rested, lit-from-within glow.
Why pair exosomes with copper peptide?
Exosomes send the signal. Copper peptide (GHK-Cu) helps rebuild the look of firmness that time softens.
Most exosome serums stop at the signal. Ours signals, then rebuilds.
That is the idea behind our Exosome + GHK-Cu Serum: one billion exosomes, copper peptide, and niacinamide for a more even-looking tone. Every ingredient earns its spot.
Want the side-by-side? Read Exosome Serum or Copper Peptide?
Who is an exosome serum for?
- Skin in perimenopause or menopause that looks thinner, duller or less bouncy.
- People who want visible results without the sting of retinol.
- Skin after a facial or peel that wants calm and moisture.
How do you use an exosome serum?
- Cleanse. Rinse No. 1 Oil Cleanser.
- Mist. Rose Water or Cactus Water.
- Treat. Press 3 to 4 drops into clean skin. Wait a few minutes.
- Seal. Field Glow Facial Oil or Blue Hour Tallow Balm.
Morning and night. Signal first, seal last. More on that in Exosomes and Tallow.
Frequently asked questions
What is an exosome in skincare? A tiny messenger particle that signals skin to look fresher, smoother and brighter.
Are exosomes stem cells? No. Stem cells are living cells. Exosomes are messages cells send out. An exosome serum contains no cells.
What does an exosome serum do? It supports the look of renewal. Over time, fine lines look softer and skin looks smoother and more luminous.
Can I use an exosome serum with a tallow balm? Yes. Serum first, then seal with a balm like Blue Hour.
Is the Exosome + GHK-Cu Serum vegan? No. It contains royal jelly. It is cruelty-free.
Shop the Exosome + GHK-Cu Serum
Honoring the balance of nature, craft, and chemistry.
Lone Tree products are cosmetics intended to support the look and feel of skin. They are not intended to diagnose, treat, cure, or prevent any disease.

