Skincare labels rarely tell you the percentage of an active ingredient. UK regulations don't require it. Which leaves a real question hanging: what percentage of bakuchiol actually works? Here's what the research used, and why chasing a bigger number is mostly a waste of money.
The research range: 0.5% to 2%
Most published bakuchiol studies, including the well-known 2018 head-to-head against retinol, used concentrations around 0.5%. That's where the strongest evidence sits: comparable improvements in the appearance of fine lines and pigmentation to 0.5% retinol, with far less irritation.
Commercial serums typically sit between 0.5% and 2%, most toward the lower half. And here's the interesting bit: unlike retinol, where higher percentages track fairly closely with both effectiveness and irritation, bakuchiol's dose-response curve is much flatter. Early research suggests going well past 0.5–1% doesn't deliver proportionally more benefit.
Why "more is better" doesn't hold here
With retinol, a higher percentage is a real trade: more potency for more irritation, managed with careful build-up. Bakuchiol doesn't work that way. It isn't chemically related to vitamin A and doesn't trigger the same renewal cascade, so cranking the concentration mostly raises the odds of an unnecessary reaction without a matching payoff.
Why the label doesn't say
UK and EU cosmetic law simply doesn't require active-ingredient percentages to be disclosed. Some brands state it as a selling point; its absence isn't a red flag. A better way to judge a formula is the ingredient's position in the INCI list. Ingredients appear in descending order of concentration, so bakuchiol sitting early in the list (rather than buried down near the preservatives) suggests a meaningful dose.
What matters more than the number
- Formulation quality. Bakuchiol needs proper stabilising and a base that lets it penetrate. A badly made 2% serum can lose to a well-made 0.5% one.
- Consistency. The studies ran daily for twelve weeks. A high percentage used sporadically will always lose to a modest one used every day.
- The company it keeps. Bakuchiol's antioxidant nature complements ingredients like vitamin C, and the combination often does more visible work than percentage ever could.
Reading a bakuchiol product sensibly
- Check the INCI order. Early listing suggests a meaningful concentration.
- Don't chase the biggest number. There's no strong evidence that above 1–2% delivers more.
- Judge by how your skin responds, not the label. If you can use it daily without irritation and see change over time, the percentage is doing its job.
- Give it twelve weeks. The research timeline applies at any concentration.
Where we sit
The Glow Serum uses bakuchiol at a concentration informed directly by the published research range, paired with stabilised vitamin C. We formulated for daily use rather than for a headline number on the box, and the full INCI list is on the product page if you want to check the ingredient order yourself.
In short: around 0.5% is where bakuchiol's best evidence lives, and commercial serums run 0.5–2%. Past that, a bigger number is marketing rather than science. Formulation quality and daily consistency will always matter more.
Curious about a specific formula? Ask us at info@haloskinshop.com.
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