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Best Sellers
Dr. Groot Scalp Revitalizing Solution Miracle In-Shower Treatment
A 5-second rinse-off treatment from the Scalp Revitalizing Solution line — one of Dr. Groot’s two US best-sellers.
Dr. Groot Hair Thickening Shampoo
Korean hair-thickening shampoo with biotin and prebiotics for thinning, weak-looking hair.
Dr. Groot Hair Thickening Conditioner
The matching thickening conditioner, made to soften without weighing fine hair down.
Silicone scalp brush that helps work shampoo into the scalp and lift build-up.
Dr. Groot Scalp Revitalizing Solution Hair Thickening Shampoo
The Costco-famous hero shampoo with biotin, niacinamide and salicylic acid.
Dr. Groot Scalp Soothing Shampoo
Biotin, centella and prebiotics for itchy, flaky or sensitive scalps.
Dr. Groot Hair Thickening Serum, Scalp Treatments & Bond Care
Dr. Groot Hair Thickening Serum
Award-winning leave-on thickening serum for thinning hair, applied to the scalp.
Dr. Groot Bond Fortifying Hair Serum
Keratin and silk serum from the bond-care line for damaged, frizzy ends.
Dr. Groot Scalp Exfoliating Detox Water
Pre-shampoo scalp detox for oily scalps and product build-up.
Dr. Groot Purifying Clay Shampoo
Clay shampoo for oily scalps that need a deeper clean.
Dr. Groot Thickening & Volumizing Shampoo
Volume-focused shampoo for fine, flat or thinning hair.
Dr. Groot Scalp Revitalizing Shampoo 23.6 oz (2-Pack)
The big-bottle twin pack — the same format sold at Costco.
Dr. Groot Shampoo & Conditioner Sets, Bundles & Travel Kits
Dr. Groot Thickening Shampoo & Conditioner Set
The thickening shampoo and conditioner duo for hair loss and thinning.
Dr. Groot Thickening Shampoo & Scalp Treatment Set
Shampoo plus scalp treatment for a two-step routine.
Dr. Groot Complete Set: Serum, Shampoo, Conditioner & Treatment
The full four-step Dr. Groot routine in one bundle.
Dr. Groot Large Thickening Shampoo & Conditioner (700 ml)
Value-size 23.6 oz shampoo and conditioner.
Dr. Groot Hair Thickening Essentials Travel Set
Travel-size biotin shampoo and conditioner for trips and gym bags.
Dr. Groot Scalp Revitalizing Solution Travel Set
Mini versions of the Scalp Revitalizing Solution line.
Dr. Groot Thicken & Smooth At-Home and On-the-Go Bundle
Full-size and travel products for home and travel.
Dr. Groot Thickening Scalp Serum & Miracle Treatment Set
Serum plus the Miracle In-Shower Treatment.
Dr. Groot Scalp Soothing Revitalizing Treatment
Leave-on scalp treatment with biotin, centella and prebiotics for thinning hair and sensitive scalps.
Dr. Groot Reviews & Buying Guide
Here is what to know before you pick a Dr. Groot shampoo, conditioner or serum.
Scalp Revitalizing Solution Line
The Scalp Revitalizing Solution range — Hair Thickening Shampoo, Miracle In-Shower Treatment and Hair Thickening Serum — is the core US line. It is the version sold at Costco and the one most Dr. Groot reviews and before-and-after photos refer to.
Dr. Groot Hair Thickening Serum & Roll-On
The thickening serum (also sold as a roll-on serum, hair pen or stick) is a leave-on scalp product. Apply it to clean scalp along the part and hairline and massage it in; do not rinse.
Anti-Dandruff, Clay & Scalp Soothing Shampoos
For flakes or itch, try the Scalp Soothing or anti-dandruff scalp care shampoo; for oily scalps the Purifying Clay Shampoo and Scalp Exfoliating Detox Water remove build-up.
Bond Fortifying & Professional Bonding System
The bond-fortifying line, with keratin and silk, targets breakage and frizz on damaged lengths rather than the scalp.
Where to Buy Dr. Groot
Dr. Groot is sold on Amazon, at Costco (in large 23.6 oz twin packs) and at Sephora. Amazon carries the widest range of sets, travel kits and serums.
Dr. Groot Reviews: What Users Say
Most Dr. Groot reviews on Amazon, Reddit and TikTok praise the thicker, fuller feel and the fragrance. The most common complaints are that results are gradual and that it may not help with medical or hereditary hair loss.
4 Reasons People Choose Dr. Groot Shampoo
Discover the benefits of Dr. Groot Shampoo and see why it’s trusted for healthier, stronger hair. From scalp care to reducing hair loss, here are four reasons to make it part of your routine:
Who Makes Dr. Groot? The Brand Story
Dr. Groot was launched in March 2017 by LG Household & Health Care, the Seoul-based beauty and household goods company founded in 1947. It was built as a specialist hair-loss symptom care brand and quickly became Korea’s best-selling functional hair-loss shampoo, passing 10 million units sold within three years.
In the US, Dr. Groot first sold online and through Amazon, then rolled out to Costco warehouses across North America with the Scalp Revitalizing Solution Hair Thickening Shampoo, and in 2026 arrived in Sephora stores. Its formulas center on biotin, prebiotics and what the brand calls microbiome technology, alongside niacinamide and salicylic acid for scalp care.
Categories
Viral Korean Hair Care
Scalp Revitalizing Solution
Professional Bonding System
Hair Care Sets
What customers are saying
“After a few weeks, my scalp feels healthier, and there’s less hair in my brush. Dr. Groot really made a difference in how strong my hair feels.””
Emma R.
Customer
“I’ve tried so many shampoos for thinning hair, and this is the first one that actually made my roots feel stronger. My hair looks fuller, and my scalp isn’t itchy anymore.”
James L.
Customer
“Was skeptical at first, but this shampoo is gentle yet effective. My hair doesn’t feel weighed down, and the breakage has noticeably decreased.”
Sophia M.
Customer
Answers to Common Questions
Dr. Groot is made by LG Household & Health Care (LG H&H), one of South Korea’s largest beauty companies.
Dr. Groot is designed for hair-loss symptoms such as thinning and breakage, and in Korea its products are registered as functional hair-loss symptom care. It is a cosmetic shampoo, not a medication like minoxidil, so it works best for thin, weak-looking hair rather than medical hair loss.
Lather the Hair Thickening Shampoo into a wet scalp, rinse, then apply the Miracle In-Shower Treatment for a few seconds before rinsing again. Add the Hair Thickening Serum to a dry or towel-dried scalp once or twice a day.
Check the label of each product: formulas differ by line. Many reviewers with color-treated hair use the thickening line, but if you need a sulfate-free shampoo, compare ingredient lists before you buy.
Yes. Most people use the shampoo daily or every other day. If your scalp feels dry, alternate with the Scalp Soothing shampoo or a gentle conditioner.
Results vary. Most reviewers say hair feels thicker after the first few washes, while visible change in shedding usually takes a couple of months of regular use.