10 Hair Serums for Thinning Hair: What To Try First

Can thinning hair be reversible? Yes, some thinning can reverse, based on the cause and how far it’s progressed; short-term triggers such as stress, low nutrients, or certain illnesses may regrow with care, whereas long-standing problems like genetic balding are usually controlled rather than cured.

Options that slow or reverse shedding include medications, low-level laser devices, platelet-rich plasma (PRP), and surgical hair transplants, but results typically need steady, long-term use to last.

Before you jump to more intensive care, test the options below and see what helps. Recent research points to several serums that may help with thinning hair.

Below are 10 leading serums for thinning hair based on experts and current trends (user reviews).

1. Keyoma Batana Oil with Rosemary Serum

A top pick for thinning. This light leave-in pairs nutrient-rich batana with rosemary to support fuller-looking roots and a calmer scalp. In one 6-month randomized trial, rosemary oil performed similarly to 2% minoxidil for pattern thinning.

Social buzz is strong: batana searches on TikTok Shop jumped 168% in early September 2024, and #rosemaryoil content has reached billions of views. A soft silicone scalp brush kept pressure even and avoided snagging for me. Part hair, place drops on a clean scalp, then massage 60–90 seconds and leave in daily.

2. The Ordinary Multi-Peptide Serum for Hair Density

This budget-friendly, easy-to-find option is a bestseller for good reason. With a mix of clinically supported peptides, caffeine, and plant extracts, the serum targets follicles, supports scalp health, and promotes thicker, denser, fuller-looking hair over time.

3. WeThrivv Revivv for Her Hair Rejuvenation Serum

If you want a clean choice in both ingredients and finish, try this serum. This natural product has botanical-based ingredients in a roll-on bottle, making it hassle-free and easy to use.

Part your hair and glide the roller over the scalp so the blend of growth-supporting peptides, circulation-enhancing caffeine, and phytoestrogens such as genistein can do its job.

Since the water-based formula feels like pure H2O, it dries fast and leaves no residue. You don’t have to sacrifice a blowout to chase growth!

4. SickScience PowerCycle Scalp Treatment Serum

Current evidence suggests topical exosomes are promising for hair growth, as they may help regenerate follicles, activate hair-follicle stem cells, and signal cells to prolong the growth phase.

While not as strong as an in-office treatment, topical exosome formulas like this one from SickScience are worth testing. It’s pleasant to apply and not greasy, and the large dropper makes targeted application easy even on very dense hair.

5. Hims Minoxidil for Men

For years, Hims has been a go-to for men seeking a thinning-hair solution. The draw is simple: it’s cheaper than a flight to Turkey, and it has a track record.

This affordable over-the-counter serum uses minoxidil, a well-known vasodilator, to support denser regrowth and the look of a fuller head of hair.

It won’t bring back hair already lost to time and genetics, but remaining strands can appear fuller and make your overall coverage look better.

6. OneSkin OS-01 Hair Peptide Scalp Serum

According to OneSkin, aging drives some cells into senescence. These senescent cells can trigger premature aging signals, which may show up as thinning hair.

This scalp serum aims to limit the buildup of those senescent cells to encourage better, thicker hair growth, reducing the look of aging at the hair level.

It relies on a proprietary peptide plus hair-friendly ingredients such as the antioxidants fisetin, sunflower sprout extract, and rice bran water.

7. IGK Sponsored Hair Density Scalp Treatment for Thinning Hair

Biotin in this serum helps hair look thicker over time, but think of it more for the look of density than driving new growth. The papers I saw show certain peptides have been found to support hair re-growth in several studies.

This serum is great for fine hair not only because of the biotin, but also because of hair health-promoting ingredients like pumpkin seed oil, which nourishes hair and can make it shinier and stronger.

Use it nightly for best results, and spray onto your thinnest areas while holding the bottle about 10 inches from the scalp. From there, massage it into the scalp for several minutes before allowing it to dry.

8. Living Proof Scalp Care Density Serum for Thinning & Greying Hair

Why not address grays while working on re-growth? This serum mixes antioxidants and amino acids in a blend they report can reduce both the look and the reappearance of gray hairs.

Their density-promoting ingredients sit in a proprietary complex, and the full composition isn’t listed. That said, the ingredient list includes amaranth peptides, which have been shown to potentially increase the diameter of individual hair fibers over time.

It’s packaged with a dropper, and the brand recommends applying three droppers full daily. They then suggest massaging it in and giving it time to dry. Their reported results were measured after 90 days of usage.

9. The Inkey List Caffeine Stimulating Scalp Treatment

Many growth promises aren’t cheap, yet this option is very affordable and performs well.

It uses caffeine extract, aiming to improve hair thickness and density. With anti-fallout and anti-dandruff benefits, it can help reset the scalp. It even works for color-treated strands, so you can maintain vibrant tone.

10. L'Oreal Paris Elvive Growth Booster Scalp Serum

If hair loss is your main concern and you need to stay on budget, give the L'Oreal Growth Booster Scalp Serum a try.

It won’t deliver dramatic growth after three weeks—growth takes time—but it can keep your scalp moisturized and in healthy condition so new hairs can thrive.

Plus, with a healthier scalp that’s less congested by buildup, you may see less hair fall, resulting in thicker, denser-looking hair.

For best use, start on clean, damp hair. Squeeze a few drops around your scalp and use a massaging brush to work it in. There’s no need to rinse, and it feels completely undetectable once your strands are dry. That’s simple and quick.

Choose a Daily Scalp Serum Routine With Keyoma

Get more from scalp serums by picking one you can apply daily, placing drops on a clean scalp, massaging briefly, and checking progress after roughly 90 days. Ingredients such as peptides, caffeine, botanical extracts, and newer exosome formulas aim to support density and scalp health, but consistency beats novelty, so change only one variable at a time.

Keep the routine simple with a natural base: choose Keyoma’s Batana Oil with Rosemary for a clean, handcrafted, vegan blend that adds slip, seals light moisture, and makes daily massage comfortable. Begin now.