Kirkland® Minoxidil Europe
Minoxidil research roundup: what the studies actually show
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Topical minoxidil has been studied for more than 35 years. This first article in our weekly series summarises the research that matters most if you use, or are thinking about using, Kirkland® Signature or FOLIGAIN® minoxidil in Europe.
5% beats 2% for men
In a 48-week randomised trial of men with androgenetic alopecia (Olsen et al., 2002), 5% topical minoxidil produced about 45% more hair regrowth than the 2% solution, and the effect appeared earlier. That is why the 5% strength is the standard choice for men today.
Itching and scalp irritation were slightly more common with 5%, mostly linked to the propylene glycol in liquid formulas.
Women: once-daily 5% foam matches twice-daily 2% liquid
A 2016 trial in women with female-pattern hair loss (Blume-Peytavi et al.) found that 5% foam applied once a day was at least as effective as 2% solution applied twice a day, with less itching. For many women this makes the routine easier to keep up.
Always follow the label of the product you buy: some packs are labelled for men only even when the formula is the same.
Foam vs liquid
- Foam usually contains no propylene glycol, so it tends to cause less itching and flaking.
- Liquid with a dropper reaches the scalp more easily through long or dense hair.
- Both deliver the same active ingredient; the best one is the one you will use every day.
Early shedding is expected
Many users notice extra shedding in the first 2–8 weeks. Studies and clinical experience link this to hair follicles moving from the resting phase into a new growth phase. It usually settles on its own; stopping at this point is the most common reason people never see results.
Results take months — and need daily use
Visible change typically appears after 3–4 months, with fuller results around 6–12 months. When minoxidil is stopped, the extra hair it maintained is gradually lost over the following months, so it is a long-term treatment.
Low-dose oral minoxidil: promising, but prescription only
Since about 2020, dermatology reviews have reported growing use of low-dose oral minoxidil for hair loss. It is not approved for hair loss in the EU, may cause side effects such as unwanted body hair, fluid retention or a faster heart rate, and should only be used under a doctor's supervision. Topical minoxidil remains the non-prescription first step.
What this means for you
- Men: choose a 5% foam or liquid and apply it consistently.
- Women: a 2% liquid or a 5% foam once daily are both evidence-based options — check the label and ask a pharmacist if unsure.
- Give any product at least 4–6 months before judging it.
- Talk to a doctor if hair loss is sudden, patchy or comes with other symptoms.
This article is informational and not medical advice. Results vary from person to person.