Why we don't use grape seed oil — and what we use instead

Every clean-beauty brand I respect makes a small list of choices I disagree with. For a long time, grape seed oil would not have been one of them — because I was using it in the Face Elixir (paired with rosehip) and the Post-Shave Elixir (paired with rosehip and sunflower). Both products are now discontinued. I was no different until I learned more and evolved.

Grape seed oil is in almost everything now. Vintner's Daughter's celebrated Active Botanical Serum is built on it. Several Tata Harper serums include it. Youth To The People's face oils rely on it. Most open-source clean-beauty formulation forums recommend it. It's cheap, cold-pressed availability is excellent, and it feels lovely on the skin — light, fast-absorbing, no greasy residue. From almost every practical perspective a small-batch formulator cares about, grape seed oil looks like the right choice.

So why don't I use it now? The short answer is: because grape seed oil is approximately 65–70% linoleic acid, which means it is a polyunsaturated fatty acid (PUFA), which means it oxidises faster than any saturated or monounsaturated alternative. And oxidation, in skincare, is not an abstract chemistry concern. It is a specific, measurable, dermatologically meaningful problem.

What actually happens when linoleic acid oxidises

Linoleic acid is a necessary component of the skin's own lipid architecture. It is part of ceramide synthesis. It is in the epidermis whether or not you put it there topically. I am not claiming linoleic acid is bad. I am claiming it is unstable, and the unstable form is a different molecule than the intact one.

When linoleic acid is exposed to oxygen — on a cutting board, in a salad dressing, in a bottle on a warm bathroom shelf, or on the surface of human skin under sunlight — it degrades through lipid peroxidation into a family of compounds collectively called oxidised linoleic acid metabolites (OXLAMs). The most characterised of these are 9-HODE and 13-HODE. The mechanistic literature (see PMC6196963 in particular) documents these compounds as pro-inflammatory signal molecules. They are not hypothetical; they are detectable, and they exert measurable effects on cell behaviour.

The skin of a person using a grape-seed-rich serum twice daily, over months, is being exposed to a slow but continuous trickle of these compounds. Is the dose high enough to matter clinically? Honestly, we do not know. There is no well-powered, long-term RCT that would answer that question — and no regulator requires one for cosmetic ingredients. What we do know is that the mechanism is real, and that it is entirely avoidable by choosing saturated or monounsaturated alternatives.

Why I was not willing to keep taking the risk

I used to shave with the kind of drugstore shave gel you can still buy at 7-Eleven for THB 89. It worked. Then I learned what was in it and decided I did not want those compounds on my skin every morning for the next thirty years. That basic logic — small risk, tiny avoidance cost, long time horizon — became the starting point for everything I formulated afterward.

The same logic, applied across the industrial seed oils in our earlier products — grape seed and rosehip in the Face Elixir, and grape seed, rosehip, and sunflower in the Post-Shave Elixir — is why we discontinued both rather than reformulate them. As the research deepened and the oxidation chemistry sharpened, I could not keep shipping those products in good conscience. Rather than quietly swap ingredients and push them back out, we retired them and built the Bio-Active range from scratch, on a rule: no polyunsaturated seed oils, even the ones that were "clean-beauty-sanctified." No grape seed, no rosehip (which is even more PUFA-heavy), no evening primrose, no sunflower, no hemp, no hazelnut. Every one of them has a legitimate tradition in skincare. Every one of them is dominated by oxidatively unstable fatty acids.

Cheap, available, feels lovely on the skin. From almost every practical perspective a small-batch formulator cares about, grape seed oil looks like the right choice. It also oxidises faster than almost any alternative on the market.

What we use instead

What replaces polyunsaturated seed oils if you refuse them is a narrower list than the skincare industry would prefer, but it is a better list. Here is what we use across the Bio-Active range, and what each one does.

Olive squalane is a saturated, stable hydrocarbon that is bio-identical to the squalene your sebaceous glands already produce. It does not oxidise meaningfully on the skin. It does not leave a heavy film. It integrates into the skin's lipid film rather than sitting on top of it. We use the olive-derived version because it has a cleaner provenance story and performs identically.

Unrefined jojoba oil is not, technically, an oil. It is a liquid wax composed ~98% of long-chain wax esters whose structure closely matches human sebum. The skin recognises jojoba as sebum and down-regulates its own production accordingly — which is why jojoba works across oily, dry, and combination skin types without the bifurcated recommendations most oils require.

Meadowfoam seed oil is the most oxidatively stable botanical oil routinely available. Approximately 95% of its fatty-acid profile is long-chain (C20 and above), with unsaturations at the ∆5 position rather than the more common ∆9 or ∆12. That geometric detail is why meadowfoam is the stability anchor across our entire Bio-Active range — it resists oxidation not only by its own chemistry but extends the stability of other oils it is blended with.

Prickly pear seed oil is the most expensive oil in Bio Gold — a kilo of oil requires a tonne of fruit. It is included because it delivers exceptionally high tocopherol content (natural vitamin E), betalains, and phytosterols that no other affordable oil provides at equivalent density. It is the oil that justified Bio Gold's price point.

Sea buckthorn CO₂ extract is our omega-7 (palmitoleic acid) source. Omega-7 is a documented driver of re-epithelialisation — the process by which keratinocytes migrate across compromised skin to rebuild barrier function. The CO₂ extraction matters: it preserves the carotenoids and phytosterols that degrade under solvent or hot-press extraction.

The argument in one line

We do not exclude grape seed oil out of purity bias. We exclude it because we can make a better product without it — one that does not trickle OXLAMs onto your face over months and years. That is the formulation argument. It is also, for me, the ethical one.

If you want to go deeper, our 0% Standard™ page explains every exclusion in similar detail. If you want to see the argument made visible, our Bio Gold serum — nine ingredients, every one recognisable to the skin — is the product it is made of.

— Mike