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Caldera + Lab

Caldera Lab The Hair Serum Mens Thickening Serum for Thinning Receding Hair Supports Fuller Stronger-Looking Hair Dermatologically Tested

4.1(49)
$69.00

305+ bought in the past month

About this item

  • PLANT EXOSOME-POWERED FORMULA – Delivering 1 billion plant-derived exosomes per dropper, this innovative serum by Caldera + Lab is engineered to supply concentrated nutrients directly to the scalp for visibly fuller, more resilient hair.
  • SCALP-CENTRIC APPROACH – By focusing on scalp balance rather than just hair strands, this next-generation solution supports the appearance of thicker, stronger hair—ideal for those seeking a sophisticated addition to their regimen.
  • FAST-ABSORBING & NON-GREASY – Formulated for seamless application, it absorbs quickly without leaving a residue, making it a hassle-free choice for all hair lengths and daily styling routines.
  • COLOR-SAFE & SULFATE-FREE – Dermatologically tested and crafted without harsh detergents, it respects color-treated hair and maintains scalp vitality without compromising on gentle, effective cleansing.
  • HIGH-PERFORMANCE INGREDIENTS – Enriched with peptides and biomimetic amino acids, this serum supports long-term scalp health and hair vitality, aligning cutting-edge biotechnology with clean, results-driven performance.

Key details

Hair Type
All
Material Type Free
Paraben Free, Sulfate Free
Scent
Unscented
Liquid Volume
1.69 Fluid Ounces
upc
857249008201

Dimensions and fit

dimensions
‎ 4.92 x 1.89 x 1.85 inches; 7.05 ounces
Product Benefits
Breakage Control, Hydrating, Soothing, Strengthening
package_dimensions
4.92 x 1.89 x 1.85 inches; 7.05 ounces

Item information

manufacturer
Caldera + Lab
best_sellers_rank
#99,310 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #34 in Hair Regrowth Tonics
Highlights

About this item

  • PLANT EXOSOME-POWERED FORMULA – Delivering 1 billion plant-derived exosomes per dropper, this innovative serum by Caldera + Lab is engineered to supply concentrated nutrients directly to the scalp for visibly fuller, more resilient hair.
  • SCALP-CENTRIC APPROACH – By focusing on scalp balance rather than just hair strands, this next-generation solution supports the appearance of thicker, stronger hair—ideal for those seeking a sophisticated addition to their regimen.
  • FAST-ABSORBING & NON-GREASY – Formulated for seamless application, it absorbs quickly without leaving a residue, making it a hassle-free choice for all hair lengths and daily styling routines.
  • COLOR-SAFE & SULFATE-FREE – Dermatologically tested and crafted without harsh detergents, it respects color-treated hair and maintains scalp vitality without compromising on gentle, effective cleansing.
  • HIGH-PERFORMANCE INGREDIENTS – Enriched with peptides and biomimetic amino acids, this serum supports long-term scalp health and hair vitality, aligning cutting-edge biotechnology with clean, results-driven performance.

From the brand

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Product videos

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Customer reviews

49 reviewsPositive

Rated 4.1/5 across 49 reviews — well received overall.

  • 75% of sampled reviews are from verified purchases.

Customers say

Customer summary is not available yet.

Reviews with images

Customer review image for Results pendingCustomer review image for Results pendingCustomer review image for A favorite!
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★★★★★

Great high quality oil

Love it, the hair serum is a solid upgrade if you want your hair to look healthier and feel softer. It goes on light, smells clean, and makes your hair look fuller without feeling greasy. The ingredients are legit, including peptides, caffeine, and plant extracts. While it’s not meant to regrow hair, it definitely improves how your hair looks and feels. It’s on the pricier side, but worth it if you’re aiming for a clean, high-end routine. Read more

PTVerified purchase
★★★★

Results pending

I got this about a month ago, but admittedly I keep forgetting to use it consistently. For that reason, it is hard to judge the effectiveness of the product. I always find these things difficult to judge anyway, because the changes would be so small it will take quite some time to really tell if it is effective or not. That being said, I will continue to use it and try to be more consistent with it, so hopefully I will have more information later on. This product comes in a thick, dark glass bottle with an easy to use dropper in the lid. The instructions suggest using 1-2 full droppers each time. I generally stick to one dropper and that seems to be enough. It says you can use it on wet or dry hair and you do not rinse it out. I have tried on both wet and dry hair and it works great on either. I was concerned it would leave my hair looking greasy with that much serum in it, but I don't notice it at all once it dries. It doesn't have a tingly feeling necessarily, but I can tell that it is there after I use it. It is almost a cooling sensation I guess. That is not a bad thing as it doesn't bother me at all. I have very thin hair and I don't want to lose any more of it, so I have been trying to help it out. I recently found a shampoo that seems to be helping, so I figured adding this as well can't hurt. I can't tell yet if this is doing anything beneficial, but it definitely is not harming anything. I like that this one is a cruelty free option that seems to use good ingredients. It is hard to judge how long this bottle will last because I can't tell how much is still inside. The bottle is heavy and the glass is dark, so I have no idea how much is left. I am not sure if I will notice any difference by the time I finish the bottle, but will update my review if I do. Read more

Customer review image for Results pendingCustomer review image for Results pending
Sarah
★★★★★

Hair growth

Drop didn’t work for me but easy to apply and not messy like other drops Read more

Chris jVerified purchase
★★★☆☆

2 months, no real noticeable results

Haven’t seen good effects. Used it for 2 months. Read more

RyanVerified purchase
☆☆☆☆

Not good product

very poor product Read more

Ratu Epi LailaiVerified purchase
★★★★★

This Serum Actually Works!!!

I’ll admit—I was skeptical at first. Most scalp treatments I’ve tried in the past were greasy, hard to wash out, and left stains on my pillowcases. Not this one. Caldera Lab’s The Serum absorbs beautifully without weighing my hair down or making it look oily. I’ve even worn it out during the day with no issues. Best of all, I’m starting to see real growth—tiny new hairs in areas that haven’t had any in years. This product feels like a miracle in a bottle. If you’ve been struggling with thinning hair or slow growth, give this a try. It’s truly a game-changer. Read more

CosmetinaVerified purchase
★★★★

Love the smell

Pros: 1. Smells nice. 2. Comes with doppler. 3. Well packaged. 4. Sealed when I received. 5. Non greasy. So I only use a bit of it and my hair feels softer and healthier. The serum is not sticky. Easy to use due to the doppler provided. Cons: expensive and after using it for over than 1 month, I don’t feel it helps with hair growth. Read more

Ysans
★★★★★

A favorite!

The best hair serum on the world! Read more

Customer review image for A favorite!
lisa chaseVerified purchase
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