Losing more hair than you used to and torn between a cosmetic hair regrowth serum, minoxidil from the pharmacy, castor oil or biotin gummies? You're not alone: the hair regrowth market is flooded with promises, and it's hard to see clearly. This article compares the four main families of solutions against objective criteria — active ingredients, level of evidence, price, practical constraints and side effects — to help you pick the one that genuinely fits your situation.
A quick word on method before we start: no cosmetic product "cures" hair loss. Serums, oils and supplements support the hair cycle and create a favourable environment; only a doctor can make a diagnosis and prescribe treatment. This comparison is here to put each option in its rightful place.
How do you choose the best anti-hair-loss serum?
Whatever the brand, a good anti-hair-loss serum can be recognised by five criteria:
- Documented active ingredients, with their dosage stated: Redensyl, Aminexil, Anagain, rosemary extract... A percentage on the label lets you compare products; a "patented complex" with no figure doesn't.
- Direct application to the scalp: that's where the follicle is. Dropper, spray or roll-on, what matters is getting the product onto the thinning area, not onto the lengths.
- A leave-in formula, so the active ingredients have time to work.
- A realistic promise: a growth cycle lasts several months. A serious serum talks about first results after 3 to 5 months, not within two weeks.
- Good tolerance: no burning or persistent itching. If in doubt, test it on a small area first.
In practice, for mild to moderate hair loss, a cosmetic serum with several active ingredients, applied every day for at least three months, offers the best balance between effectiveness and effort. For advanced or sudden hair loss, the right move is still to see a dermatologist.
The 4 families of solutions under the microscope
1. Minoxidil: the medical benchmark, with its drawbacks
Let's be honest from the outset: for advanced androgenetic alopecia, minoxidil (2% or 5%, from the pharmacy) remains the benchmark, validated by clinical studies and recommended by dermatologists. It's a medicine, not a cosmetic, and its effectiveness on this type of hair loss has been documented for decades.
But that effectiveness has a flip side that anyone who reads the forums knows well:
- Rebound effect when you stop: the hair you've gained can fall out again if you stop applying it. It's a lifelong commitment.
- Possible side effects: scalp irritation, itching, hypertrichosis (unwanted hair growth on the face), and a phase of increased shedding at the start that puts many people off.
- Texture and practicalities: a lotion or foam to apply once or twice a day, which can make hair greasy and styling more difficult.
- Medical follow-up advised: it's recommended to get medical advice before starting, especially for women (the 5% version is generally not intended for them).
Who is it for? People with established or advanced androgenetic alopecia who are ready to commit for the long term and accept the constraints of a medicine.
2. New-generation cosmetic serums (Redensyl, Aminexil, peptides)
This is the category that has made the most progress in recent years. Cosmetic serums rely on patented active ingredients tested in the lab — they aren't medicines, but they are backed by studies carried out by their manufacturers:
- Redensyl, a plant-derived ingredient that targets the stem cells of the hair follicle, showed interesting results on hair density over 84 days in its manufacturer's tests. We've taken a detailed look at what the Redensyl studies are really worth in a dedicated article.
- Aminexil, developed by L'Oréal's laboratories, works against the stiffening of collagen around the root to help keep the hair firmly anchored. Our full analysis of Aminexil explains how it works and where its limits lie.
- Peptides and caffeine often round out these formulas to stimulate microcirculation in the scalp.
The strengths of this family: no documented rebound effect as with minoxidil, generally good tolerance, lightweight textures that don't leave hair greasy, and use that fits in with a normal styling routine. The limitation: the level of evidence is still lower than for a medicine, and results take 2 to 3 months of consistent use.
In this category, the ORVOVA roll-on serum combines Redensyl, Aminexil and peptides in a roller-ball applicator that massages the scalp as you apply it — a practical detail that matters, because scalp massage boosts microcirculation, and many people give up on classic dropper serums because applying them is such a chore.
Who is it for? Mild to moderate hair loss: reactive shedding (stress, postpartum, change of season), early thinning, hair that's becoming finer, or as part of an overall hair care routine.
3. Oils and home remedies (castor oil, rosemary, onion...)
Castor oil is probably the most searched-for hair remedy on Google. So what should you honestly make of it?
- What's plausible: oils nourish the hair fibre, coat each strand and make hair look thicker. The massage that goes with applying them stimulates microcirculation. Rosemary essential oil has a few encouraging studies behind it.
- What isn't: no oil can revive a miniaturised follicle. The impression of "faster growth" mostly comes from hair that breaks less and therefore grows longer. We've unpacked the whole topic in our detailed review of castor oil.
- The drawbacks: very greasy textures, shampooing required after every application, a risk of clogged pores on the scalp if not rinsed properly, and highly variable results.
Who is it for? As an extra for maintenance, against breakage and dryness — not as the main solution for established hair loss.
4. Food supplements (biotin, zinc, iron, keratin)
Hair gummies and capsules are flying off the shelves, but how useful they are depends entirely on your situation. If your hair loss is linked to a confirmed deficiency (iron, zinc, vitamin D — common in women), correcting that deficiency can make a real difference. If your intake is normal, extra biotin won't do much: the body simply gets rid of the excess.
Our guide to the hair supplements that are worth it details which nutrients are genuinely useful and in which cases. The key takeaway: get a blood test before taking supplements blindly, and remember that working from the inside combines well with a topical treatment, without replacing it.
Who is it for? Hair loss linked to a deficiency or fatigue, ideally after a blood test, alongside a treatment applied to the scalp.
Comparison: hair regrowth serum vs the 3 alternatives
| Criterion | Minoxidil | Cosmetic serum (Redensyl/Aminexil) | Oils / home remedies | Food supplements |
|---|---|---|---|---|
| Status | Medicine | Cosmetic | Cosmetic / natural | Food supplement |
| Level of evidence | High (independent clinical studies) | Intermediate (manufacturer studies) | Low to anecdotal | High if deficient, low otherwise |
| Best suited for | Advanced androgenetic alopecia | Mild to moderate or reactive hair loss | Breakage, dryness, maintenance | Identified deficiency |
| Approximate monthly cost | €20-40 | Varies by brand (often €20-60) | €5-15 | €15-30 |
| Side effects | Irritation, rebound effect, possible hypertrichosis | Rare (generally well tolerated) | Greasy scalp, possible clogged pores | Rare at recommended doses |
| Constraints | 1-2 applications/day for life, medical advice recommended | Daily application, 2-3 months of consistent use | Application + shampoo, unpredictable results | Course of at least 3 months |
| Styling-friendly | Moderately (texture) | Yes (lightweight textures) | No (rinsing required) | Yes |
Our honest verdict: which solution for which profile?
Advanced hair loss or significant thinning: see a doctor first
If your scalp is clearly visible, if the hair loss has been going on for more than six months or is speeding up, the right first step isn't a product but an appointment with a dermatologist. Minoxidil, possibly combined with other prescription treatments, remains the best-documented route for established androgenetic alopecia. A cosmetic serum, however well formulated, isn't in the same league — and any brand that claims otherwise is lying to you.
Mild to moderate hair loss: a cosmetic serum offers the best balance of benefits and constraints
For the vast majority of everyday situations — seasonal shedding, post-stress, postpartum, hair becoming finer, early loss of density — the balance of benefits and constraints clearly tips in favour of new-generation cosmetic serums. No lifelong commitment, no documented rebound effect, good tolerance, and active ingredients like Redensyl and Aminexil backed by encouraging data on hair density and anchoring.
That's exactly where the ORVOVA Hair Regrowth Roll-On fits in: a formula that combines Redensyl, Aminexil and peptides in a roll-on applicator that makes the daily routine quick and turns every application into a scalp massage. Free delivery in France from €49. Our advice is the same as for any serum: judge it on 12 weeks of consistent use, not 15 days, and take "before" photos so you can compare objectively.
Maintenance and prevention: oils and supplements in a supporting role
Oils and supplements aren't useless — they're simply misplaced when they're presented as primary anti-hair-loss solutions. Use them for what they do well: nourishing the fibre and limiting breakage for oils, correcting underlying imbalances from the inside for supplements (after a blood test). Combined with a topical serum, they make up a coherent routine.
Questions to ask yourself before you buy
- Is my hair loss recent or long-standing? Recent and diffuse: a cosmetic serum makes sense. Long-standing with thinning patches: get medical advice first.
- Am I ready to apply a product every day for 3 months? No option works without consistency — in practice, it's the criterion that rules out the most products. A quick-to-apply format improves your chances of sticking with it.
- Are there studies on the active ingredients, not just on the brand? Look for concentrations and named actives (Redensyl, Aminexil) rather than "secret" formulas.
- Is the messaging honest? Be wary of "results in 7 days": the hair cycle makes that kind of promise physiologically impossible.
In summary
There's no miracle solution, but there is a suitable solution for every situation: minoxidil for advanced androgenetic alopecia under medical supervision, a cosmetic serum with Redensyl and Aminexil for mild to moderate hair loss, and oils and supplements to support an overall routine. To understand in depth how hair loss works, which active ingredients matter and the realistic week-by-week timeline for results, carry on with our complete guide to hair regrowth.
