Hair Growth Serums Explained: What Percentages Mean and Which One You Need

Walk into any pharmacy or scroll any online store in Pakistan and you'll see the same thing: serums labelled 2%, 5%, 10%, 14%, 18%. It's natural to assume a bigger number means a stronger, faster serum. It doesn't. The number on the bottle means different things on different bottles, and picking by percentage alone is the quickest way to waste six months and a lot of money.

This guide explains what those percentages actually measure, how minoxidil strengths compare, what the newer peptide serums (Redensyl, Procapil, Capixyl, Anagain, Baicapil) can and can't do, and how to match a serum to your kind of hair loss.

The short answer:

• Minoxidil (2% or 5%) is the best-proven topical for pattern hair loss. 5% works better than 2% on average, and 10% is no better and causes more side effects.

• Peptide and botanical serums (Redensyl, Procapil, Capixyl and similar) have promising but smaller and weaker evidence. They suit early thinning, people who can't tolerate minoxidil, and maintenance.

• A bigger total percentage is not a stronger serum. "14%" usually means several actives added together, not one ingredient at 14%.

• No serum fixes the cause of sudden shedding. Iron, vitamin D, thyroid, stress, illness and crash diets need to be dealt with first.

What the Percentage on a Hair Serum Actually Means

A percentage on a serum can mean three quite different things.

1. The strength of one drug. On a minoxidil product, "5%" means 5 grams of minoxidil in every 100 ml of liquid. This is a regulated, tested strength, and it's the only case where a higher number reliably means a stronger product (up to a point, as you'll see below).

2. The total of several actives added together. A "14%" or "18%" serum is normally a blend. Say it contains Redensyl 3%, Baicapil 5%, Procapil 2% and Anagain 4%. Those add up to 14%, but that doesn't make it 14% of anything in particular, and it isn't "seven times stronger" than a 2% product. Each ingredient is working through a different route at its own dose.

3. A claimed result. Phrases like "up to 90% less hair fall" or "214% growth" are results claimed for an ingredient in a manufacturer's own test, usually small and short, not what a serum will do on your head. Treat these as marketing, not a percentage of strength.

Three more things sit behind the number and matter just as much:

• The ingredient list order. If a "5% active" serum has the active at the very end of the list, it is probably far below 5%.

• The formula. Alcohol, propylene glycol and other carriers affect how well the active reaches the follicle, and how irritating the serum is.

• How consistently you use it. A 5% serum used three times a week loses to a 2% serum used every day.

Minoxidil: 2% vs 5% vs 10%

Minoxidil is the only topical treatment approved for pattern hair loss (androgenetic alopecia) in both men and women. It is a long-running, well-studied drug, which is why it is the benchmark every other serum is compared against.

What the trials show. In a 48-week randomised trial comparing 5% minoxidil, 2% minoxidil and placebo, 5% was significantly better than both. Reviews of that trial commonly describe the extra regrowth with 5% as about 45% more than with 2%. That is the main reason men are usually advised to go straight to 5%.

What about 10%? Concentrations of 10% are not approved for hair loss, and studies have not shown they outperform 5%. They have caused more side effects, including headaches, light-headedness, allergic reactions and unwanted facial hair. More is not better here.

For women. The 2% solution is the traditional starting point, and a 5% foam is approved for women in the US. The 5% liquid is also commonly prescribed to women, but it carries a higher chance of unwanted facial hair and irritation, so it is best started under a dermatologist's guidance.

What to expect from any minoxidil strength:

• Weeks 2 to 8: Extra shedding is common. It's older hairs making way for new ones and usually settles down.

• Months 4 to 6: Visible improvement starts for most people who respond.

• Month 12: Peak results.

• If you stop: Gains fade, and hair loss tends to return to where it would have been within about six months.

Who should avoid it or ask a doctor first: pregnant or breastfeeding women, people with heart conditions or low blood pressure, anyone with an irritated or broken scalp, and anyone who reacts to propylene glycol (look for a foam if so).

In Pakistan, 2% and 5% minoxidil are available from pharmacies. Buy from a registered pharmacy, check the batch and expiry, and be wary of any "10%" or "15%" product with no clear manufacturer.

Peptide and Botanical Serums: What the Actives Do

The newer generation of serums doesn't use minoxidil. They use plant-derived and lab-made actives aimed at the follicle's stem cells, anchoring proteins or DHT activity. A review of the evidence in the International Journal of Trichology looked at the most common ones. Here is how they compare:

The honest picture. These studies are mostly small, short, often funded by the ingredient makers, and in many cases test blends rather than a single active, so you can't tell which ingredient did the work. Some trials involved only men. Most don't include a head-to-head against standard treatment.

One 24-week trial of 106 men did compare a Redensyl, Capixyl and Procapil combination with 5% minoxidil and reported better scores for the combination. That is interesting, but it is a single study in a small journal, so it isn't enough to say these serums replace minoxidil. Reviewers have concluded that they are best seen as an add-on, a maintenance option, or an alternative for people who can't tolerate standard treatments.

The upside is real too: peptide serums are generally gentle, fragrance-light, and rarely cause the dryness or itching that some people get from minoxidil.

So Is a Higher Percentage Better?

Only sometimes.

• Within one drug, up to a point. 5% minoxidil beats 2%. 10% doesn't beat 5%.

• Between different actives, not at all. A 3% Redensyl serum and a 5% Capixyl serum aren't comparable by number. They work differently and their effective doses differ.

• For blends, the total says very little. What matters is which actives are in it, at what dose each, and whether they're backed by studies at that dose.

When you're comparing serums, ask: Which actives? How much of each? What's the evidence for that dose? Can I use it twice a day without irritation? That tells you far more than the biggest number on the front of the box.

Which Serum Do You Need?

The right choice depends more on why you're losing hair than on which product has the highest percentage.

You're a man in your 20s or 30s with a receding hairline or crown thinning. This is almost always DHT-driven pattern loss, and it responds best to early treatment. Minoxidil 5% is the strongest topical option, and a dermatologist can tell you whether to add anything else. Our post on DHT and why the hairline recedes early explains the mechanism. If you'd rather not use minoxidil, or want a supporting serum alongside it, a multi-active peptide serum like Regain Max combines Redensyl, Baicapil, Procapil and Anagain. You can also browse products for a receding hairline.

You're a woman with a widening part or thinner ponytail. Start with the 2% option or a gentle peptide serum, and get iron, ferritin, vitamin D and thyroid levels checked, because these are very common contributors in Pakistan. Our guide on the medical reasons Pakistani women lose hair covers what to test, and the link between thyroid problems and hair loss is worth reading if your shedding came with fatigue or weight changes.

You're shedding heavily after illness, childbirth, stress or a crash diet. This is usually telogen effluvium, and a serum won't fix it. It settles once the trigger is resolved, typically over three to six months. A gentle serum may help the regrowth phase, but fixing the cause comes first. See why hair regrowth can be slow after shedding, and post-pregnancy hair loss if that's your situation.

You want to avoid minoxidil, or you're pregnant or breastfeeding. Peptide and botanical serums are the usual alternative, but "natural" doesn't mean "safe in pregnancy." Ask your doctor before using any active serum, including essential-oil based ones.

You have mild thinning or a lot of hair fall and want a gentle starting point. A 4% hair-fall serum is a simple first step, and you can scale up later if you need to.

You have bald patches, a painful or scaly scalp, or sudden patchy loss. See a dermatologist. These can be alopecia areata, scarring alopecia or a fungal problem, and no cosmetic serum treats them.

How to Use a Hair Growth Serum Properly

1. Patch test first. Dab a little behind your ear and wait 24 hours.

2. Apply to a clean, dry scalp. Damp skin absorbs differently and can dilute the product. Wash your hands afterwards.

3. Part your hair and apply to the thinning area, not along the length of the strands. Use the dropper or pump amount on the label, and don't double up.

4. Massage lightly with your fingertips for a minute or two. A wooden comb for scalp stimulation can add a little extra circulation, but be gentle.

5. Don't rinse it off. Leave-on serums are meant to stay on the scalp.

6. Use it at the frequency on the label. Minoxidil is twice a day; many peptide serums are once or twice a day. Missing days is the most common reason people say "it didn't work."

7. Give it at least three months before judging, and ideally six. Take a photo of your parting in the same light each month.

8. Change one thing at a time. Starting a serum, a new shampoo and a supplement in the same week makes it impossible to tell what helped or irritated.

Can you combine them? Many dermatologists do combine minoxidil with a peptide serum, but use them at different times of day and add the second only after your scalp has settled. A rosemary-based oil such as a rosemary-mint growth oil can be a supporting step on oiling days, while the serum stays your daily treatment. Our guide on using rosemary oil correctly shows how to do that without clogging the scalp.

Pakistan-Specific Tips

• Heat and sweat: Apply serum on a dry scalp, and wait until sweat has dried. Heavy oiling on top of a serum in summer can leave a greasy, clogged scalp.

• Hard water: Mineral buildup on the scalp can interfere with absorption and cause itching. A rinse routine and an occasional clarifying wash help; see our post on how hard water damages hair.

• Counterfeits and unlabelled imports: Buy from the brand's own store or a registered pharmacy. Avoid products with no ingredient list, no batch number, or a strength that sounds too good to be true.

• Test before you spend: Ferritin, vitamin D and TSH are inexpensive and explain a large share of hair fall. No serum will outwork a deficiency.

Side Effects and When to Stop

• Minoxidil: itching, dryness, flaking, early shedding, and in some people unwanted hair on the face or hands. Dizziness, a racing heart, swelling or chest pain need urgent medical advice.

• Peptide and botanical serums: mild itching or redness in a few people, usually from alcohol or fragrance in the base.

Stop and see a doctor if your scalp becomes red, swollen or painful, if you develop a rash, or if shedding gets noticeably worse after the first two months. See a dermatologist as well if you've used a proper treatment for six months with no change.

The Bottom Line

The percentage on the bottle is a clue, not a verdict. Within minoxidil, 5% beats 2% for most people and 10% adds risk without benefit. Across peptide serums, the total number mostly tells you how many actives are in the mix, not how strong the serum is. Match the product to the cause of your hair loss, apply it consistently for at least three to six months, fix any underlying deficiency alongside it, and see a dermatologist if loss is sudden, patchy or not improving.

Frequently Asked Questions

Is 5% minoxidil better than 2%? 

On average, yes. In a 48-week trial, 5% gave significantly better results than 2%, and reviews describe it as roughly 45% more regrowth. It also has a slightly higher chance of irritation and facial hair, so 2% is a sensible start for women and sensitive scalps.

Is minoxidil 10% more effective? 

No. 10% isn't approved for hair loss, hasn't been shown to beat 5%, and has been linked to more side effects such as headaches, light-headedness and allergic reactions.

Which minoxidil percentage is right for women? 

Most women start with 2%, or with a 5% foam under a dermatologist's guidance. Higher strength raises the chance of unwanted facial hair without guaranteeing better regrowth.

Which minoxidil percentage is right for men? 

Most men are advised to use 5%, since it has been shown to outperform 2%.

How long does minoxidil take to work for women? 

Plan for four to six months before visible improvement, with the best results around a year. Extra shedding in the first two to eight weeks is common and usually settles.

What are the side effects of minoxidil? 

Itching, dryness, flaking, early shedding and sometimes unwanted facial hair. Rarely, systemic effects such as dizziness, a racing heart or swelling occur and need prompt medical advice.

Is Redensyl better than minoxidil? 

Not on the evidence available. Redensyl has small trials showing promise, but minoxidil has decades of larger studies. Redensyl is better thought of as a gentler option or an add-on.

What is the difference between Redensyl, Capixyl and Procapil? 

They work in different ways. Redensyl targets follicle stem cells, Procapil supports anchoring, blood flow and DHT activity, and Capixyl strengthens anchoring and may reduce DHT activity. Many serums combine all three.

Is Capixyl better than Redensyl? 

There's no head-to-head proof that one is superior. They're usually used together because they act through different routes.

Do Redensyl, Procapil and Capixyl actually regrow hair? 

They may increase growing hairs and density in early or mild pattern loss, but the studies are small and short. They're unlikely to regrow hair in long-bald areas.

Does a hair growth serum really work? 

Some do. Minoxidil has strong proof. Peptide serums have modest, early-stage evidence. None work if the real cause is a deficiency, thyroid issue or heavy stress.

Can I use minoxidil and a peptide serum together? 

Many dermatologists combine them, but introduce them one at a time, a few weeks apart, so you can tell what's helping and what's irritating you.

How long should I use a hair growth serum before deciding it doesn't work? 

At least three months, and ideally six. Hair grows slowly, and most visible change shows between months four and six.

What percentage is best in a hair serum? 

There's no single best number. For minoxidil, 5% is the best-proven strength for most men and 2% for many women. For peptide serums, look at the actives and their doses rather than the total percentage.

Can I use a growth serum while pregnant or breastfeeding? 

Avoid minoxidil, and ask your doctor before using any active serum or essential oil during pregnancy and breastfeeding.