Squalene: Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Squalene is a natural oil (from olives or, historically, shark liver) used mainly in skincare as a moisturiser. Topical use is well established; oral claims are limited.
What is Squalene?
Squalene is a lipid made naturally by the skin and found in olive oil and shark liver oil; the stable form squalane is widely used in cosmetics. It is sold for skin and antioxidant support.
What Squalene is commonly used for
In supplements, Squalene is most often included for skin & anti-aging support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Squalene works
Squalene is a component of skin's natural oils and an antioxidant; topically it moisturises and helps maintain the skin barrier, the basis for its cosmetic popularity.
What the evidence says
Here's an honest snapshot of what published research suggests about Squalene — including where the evidence is limited.
- Topical squalane is a well-regarded, non-greasy moisturiser. Evidence for oral squalene supplements providing distinct health benefits is limited.
- Study quality and doses vary, and a result seen in research doesn't guarantee the same for any individual — use the sources below to check the current evidence on Squalene rather than relying on marketing claims.
Typical dosage used in studies
Cosmetic products use it at formulated levels; oral supplement dosing is not well established. This is general information from research, not a personal recommendation or a dosing instruction.
Side effects and safety
Squalane (the stable form) is very well tolerated on skin. Plant-derived squalene is preferred over shark-derived for sustainability and safety reasons. As with any supplement, it's sensible to introduce Squalene on its own, use a trusted brand, and stop if you notice any reaction.
Medication interactions and who should avoid Squalene
Medication & safety check
Squalene can interact with certain medications or health conditions in ways that aren't always obvious. If you take any regular medication, are pregnant or breastfeeding, or manage a health condition, confirm Squalene is appropriate for you before starting.
This is general information, not personal medical advice. If you take any medication, are pregnant or breastfeeding, or have a health condition, confirm it's safe to use Squalene with your doctor or pharmacist first.
Sources & further reading
For authoritative background and the current research base on Squalene, consult:
- PubMed — search the research on Squalene
- NIH Office of Dietary Supplements
- NCCIH — National Center for Complementary and Integrative Health
- MedlinePlus — drugs, herbs & supplements
Frequently asked questions
Does Squalene actually work?
Topical squalane is a well-regarded, non-greasy moisturiser. Evidence for oral squalene supplements providing distinct health benefits is limited. As with most supplements, results vary between people and the marketing is often stronger than the evidence — so it's worth checking the research before relying on it.
Is Squalene safe to take?
For most healthy adults at normal doses it's generally well tolerated, but there are real cautions. Squalane (the stable form) is very well tolerated on skin. Plant-derived squalene is preferred over shark-derived for sustainability and safety reasons. If you take medication, are pregnant or breastfeeding, or have a health condition, check with a doctor or pharmacist first.
What is Squalene used for?
In supplements, Squalene is mainly included for skin & anti-aging support — as nutritional support, not as a treatment for any medical condition.
Where you'll find Squalene
On FactoWiki, Squalene is the kind of ingredient you'll see discussed in these supplement categories. Each category guide breaks down what the evidence does and doesn't support.
Related ingredients to explore
Ingredients often studied or formulated alongside Squalene — useful for understanding the full picture of a formula.