Amaranthus Cruentus Seed Oil
INCI: AMARANTHUS CRUENTUS SEED OIL
Reviewed by Emma · Last updated 2 Jun 2026
Also known as: Amaranthus Cruentus Seed Oil
A plant oil rich in fatty acids and antioxidants to support skin resilience
Best For Skin Types
All, Dry, Sensitive, Mature
Addresses
Effective Concentrations
0.05–0.15%
Usage Frequency
Daily
What Is Amaranthus Cruentus Seed Oil?
Amaranthus cruentus seed oil is a plant-derived oil extracted from the seeds of amaranth, a grain crop with a long history of use in food and traditional medicine. The oil is naturally rich in unsaturated fatty acids, squalene, vitamin E and phytosterols—compounds that support the skin's structural integrity and antioxidant defences.
In skincare formulations, it functions as a skin conditioning agent and protective ingredient, helping to nourish and support the skin barrier.
How It Works
The oil's protective mechanisms appear to centre on its rich composition of bioactive compounds. Vitamin E and phytosterols work as antioxidants, neutralising reactive oxygen species (free radicals) that form when skin is exposed to UV radiation and environmental stressors. These compounds may help prevent the chain of cellular damage that leads to inflammation and premature ageing.
Additionally, the oil's unsaturated fatty acids and squalene help reinforce the skin's natural lipid barrier. A stronger barrier reduces water loss, improves resilience to irritants and supports the skin's own repair processes—including collagen synthesis.
Clinical Evidence & References
Laboratory studies on human skin fibroblasts (the cells responsible for collagen production) suggest that amaranthus cruentus seed oil can counteract some of the damaging effects of UVA radiation. When applied at concentrations of 0.05–0.15%, the oil appeared to suppress markers of cell death, reduce expression of pro-inflammatory factors (NF-κB and COX-2), and support collagen biosynthesis in UV-exposed cells.
However, these findings are from in vitro (test tube) studies, not human skin trials. More research in living subjects would be needed to confirm whether these benefits translate to meaningful improvements in real-world skincare use. The evidence is promising but preliminary.
How to Use
Amaranthus cruentus seed oil is typically used as a supporting ingredient in serums, moisturisers and oils rather than as a standalone treatment. It integrates well into layered skincare routines—apply it after water-based treatments and before heavier creams to maximise absorption. As with any new oil, introduce it gradually if you have sensitive skin, and patch test first if you are prone to reactions.
Safety & Precautions
Frequently Asked Questions
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