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THE KOJIC ACID BRIGHTENING BAR

THE KOJIC ACID BRIGHTENING BAR

Regular price $27.00
Regular price Sale price $27.00
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  • made-in-canada-flagMADE IN CANADA

Versatile Kojic Acid can address multiple body pigmentation concerns, minimizing the appearance of dark spot pigmentation in the underarm region OR anywhere you see pigmentation forming on your body. This easy-to-use bar ensures that you stay consistent with your pigmentation efforts as it stays in your shower to remind you to wash the affected area daily.

Kojic Acid Dipalmitate (a more stable form of kojic acid that does not oxidize). It works by inhibiting the enzyme tyrosinase, which is responsible for melanin production, and with consistent use will brighten the affected area

Can be used on dark spot pigmentation  

  • Underarms* 

  • Elbows & Knees 

  • Inner Thighs 

  • Buttocks 

  • Hands (age/liver spots) 

Also, can be used on pigmentation from: 

  • Ingrown Hairs 

  • Insect Bites 

  • Bacne (Back Acne) Scars 

  • Chest Acne Scars 

  • Buttocks Blemishes  

Use the kojic acid brightening bar daily in the shower. Moisten the bar and apply the lather to affected areas with hands, or silicone exfoliating brush. Massage for 30 seconds to allow the actives to penetrate the area before rinsing off. Not suggested for use on your entire face. Spot treatment, the affected area only.

KEY INGREDIENTS & BENEFITS 

  • kojic acid dipalmitate: brightens skin, prevents dark spot formation – the superior form of kojic acid 
  • licorice root extract: anti-inflammatory and brightening active 
  • sea salt: kills odor-causing bacteria and leaves a protective anti-odor barrier when using this in the underarms 

Natural, vegan, cruelty-free, dermatologist tested and non-irritating 
Made with a certified natural fragrance blend 

 

FULL INGREDIENTS Sodium Palmate*, Sodium Cocoate and/or Palm Kernelate, Aqua/Water/Eau, Glycerin, Titanium Dioxide (CI 77891), Kojic Dipalmitate, Butyrospermum Parkii (Shea) Butter, Sodium Citrate, Sodium Chloride, Glycyrrhiza Glabra (Licorice) Root Extract, Daucus Carota Sativa (Carrot) Root Extract, Parfum,  Citrus Medica Limonum (Lemon) Peel Oil,  Juniperus Virginiana Oil, Lavandula Angustifolia (Lavender) Oil, Pogostemon Cablin Leaf Oil,  Citronellol, Eugenol, Geraniol, Linalool, Sodium Gluconate, Pentasodium Pentetate,  

*derived from sustainable palm oil  

SHIPPING RATES

Free Shipping on orders over $65 (before tax and after discounts) to Canada and the United States (please note that US orders will have a $3.50 fee applied. This small customs clearance fee helps ensure your order clears international borders without delay.)

For orders below $65 to Canada and the U.S., see the table below for shipping rates:

Shipping Destination Standard Shipping (5-10 days)
United States $15.00 customs clearance fee is now included in shipping rate
Canada $12.00
International N/A - Click to see our Store Locator
RETURNS & EXCHANGES

kaia naturals would like you to be completely satisfied with your purchase.

We are pleased to offer a 30 day return or exchange if you are unsatisfied with your purchase.

For more information on shipping & returns, click here.

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FAQ's

The longer the pigmentation has been present, the longer it will take to see significant improvement. Customers have reported seeing initial results within the first couple weeks, with more significant results within 4-6 weeks. 

Use both steps (the kojic acid brightening bar and niacinamide brightening deodorant) for faster underarm brightening results

Post-inflammatory hyperpigmentation is a result of irritation. Brightening treatments will be unsuccessful until underlying cause of inflammation has been addressed. 

We recommend implementing the following tips: 

  • Shaving is the #1 cause due to irritation. Use a shave oil, shave at night and don’t apply anything to the area for 12-24 hours following shaving. 
  • Avoid irritating underarm products that contain ingredients such as baking soda, aluminum or high levels of fragrance 
  • Reduce chafing and friction in affected area, including chafing from tight, non-breathable clothing materials 

People with: 

  • dullness 
  • uneven tone 
  • mild discoloration 
  • texture issues 
  • underarm or body areas that need brightening maintenance 

People with deep hyperpigmentation (melasma, old PIH, scars) will need a leaveon brightener in addition to this bar this is why we suggest using this bar in tantum with the brightening deodorant.

This is a good question most people don't  ask? . Most skincare actives do require prolonged contact time to penetrate deeply — serums and leave-on treatments work partly because they sit on the skin for hours. Rinse-off kojic acid works differently: it delivers a short, consistent hit of tyrosinase inhibition at the skin's surface every single day. The cumulative effect of daily brief contact — paired with a leave on brightening product can show significant results without damaging the skin barrier with harsh brightening ingredients. 

It's a genuinely meaningful ingredient distinction.   Regular kojic acid is chemically unstable — it oxidizes when exposed to air and light, turning products yellow and reducing efficacy over time. Kojic acid dipalmitate is a lipid-soluble ester derivative of kojic acid that is significantly more stable, doesn't discolour, and is considered more suitable for sensitive skin and skin of colour because it's less likely to cause contact irritation. Dermatologists recommend it specifically for these reasons. The formula works exactly as intended from first use to last, not just when the bar is fresh.

Yes — and this is one of the most important things to understand about any melanin-inhibiting ingredient. Kojic acid reduces melanin production, and melanin is your skin's natural defence against UV radiation. Less melanin in treated areas means those areas are temporarily more vulnerable to UV damage.

If you're treating your underarms, knees, or elbows and then exposing those areas to the sun without protection, you can reverse your progress — and in some cases trigger new hyperpigmentation from the UV exposure. For underarms, this is low-risk since they're rarely sun-exposed. For knees, elbows, hands, or inner thighs that see sunlight, apply SPF 30+ to treated areas when outdoors. This isn't optional if you want your results to hold.

The bar works on any area of the body experiencing post-inflammatory hyperpigmentation — the dark marks left after skin heals from any injury. This includes ingrown hair scars on the bikini line or legs, back or chest acne blemish marks (sometimes called bacne scars), dark spots on the buttocks, insect bite marks that have left pigment behind, and age/liver spots on the hands.

The 30-second massage application works the same way everywhere: moisten the bar, lather, apply to the specific area, massage gently, let sit briefly, rinse. Use it only on the affected spot, not as a full-body wash — the actives are meant for targeted treatment, and the sea salt concentration is too drying for all-over use.

USING EVERYDAY IS KEY STOP USING IT AND RESULTS WILL TAKE LONGER.

The white appearance of the bar comes from titanium dioxide in the formula, which acts as a stabiliser for the kojic acid. However, it lathers and rinses completely clean — there is no white cast, residue, or film left on the skin after rinsing. People with all skin tones use this daily without any visible residue issue. If you're patch-testing and notice the lather appearing white in your palm, that's expected and washes away entirely.

You don't have to choose — but you should understand what each does. The Underarm Bar (charcoal + ACV) is designed to eliminate odour-causing bacteria and extend deodorant wear time. It does not brighten. The Brightening Bar inhibits melanin overproduction and fades dark spots. It also has some antibacterial benefit from its sea salt content, but it's not as focused on bacteria as the Underarm Bar.

If dark underarms are your primary concern, switch to the Brightening Bar as your Step 1 and pair it with the Brightening Deodorant as Step 2. If odour is your primary concern with no darkening issue, keep the Underarm Bar and use the Charcoal Deodorant. If you have both concerns — which many people do — the Brightening Bar handles both adequately, and the 2-step Bright system addresses both simultaneously.

Both work, but the approach depends on frequency. A silicone exfoliating brush increases the mechanical exfoliation effect, which helps remove the outer layer of pigmented skin cells faster and helps the kojic acid penetrate more effectively. Use it freely if you're exfoliating the area no more than twice a week. If you're already doing more exfoliation than that — with a scrub, chemical exfoliant, or washcloth — use your hands for the bar to avoid over-exfoliating, which causes micro-inflammation and, ironically, more pigmentation. For underarms specifically: gentle is always better. The skin there is thin and reactive. The 30-second lather-and-rinse is already doing meaningful work without aggressive scrubbing.

Results are maintainable without permanent daily use — but you do need to keep the triggering conditions under control. Once your hyperpigmentation has faded to your satisfaction, you can reduce to every other day or a few times a week for maintenance. However: if you go back to a deodorant with aluminum or baking soda, start shaving without protection, or wear tight synthetic fabrics that create ongoing friction, the inflammation cycle restarts and pigmentation can return.

The bar is most effective when you treat it as part of a longer-term approach to skin health rather than a one-time fix. Many people keep it in their shower rotation permanently because it also functions as a gentle daily cleanser for their targeted areas — and because the cost of occasional prevention is lower than the cost of treating new darkening from scratch.

  • 5 stars: 100 (84%)
  • 4 stars: 13 (11%)
  • 3 stars: 1 (1%)
  • 2 stars: 2 (2%)
  • 1 star: 3 (3%)
Some of the reviews shown are from related products the merchant grouped with this one.
j
joan Stetsko
Great smell

Great smell, been using several months on my hands & wrists as well as left cheek-sun damage. Can’t see any results. Will continue.
I would like to see small bars indicated, hotel size sample, can nearly hold in hand, rather pay more & get larger products.

K
Kotrynasap
Great

Great

R
Ruth

Always my favorite

S
Sandy Batres
Too soon to tell, but I like it.

I have maybe 3.5 weeks using it, I want to believe I do see some slight lightning, but I need to use it for longer to say if it does work. I have struggled with Dark underarms since I was 9/10 years old when I started shaving, so it is chronic darkness at this point that is why I think it will take time. I also just shaved so that probably did not help. I will start waxing and then I will be able to tell if it has made a difference.

N
Nadeem Khan
Smells amazing

Smells amazing, does a good job as a soap but it's brilliant because it doesn't leave the skin dehydrated. Still have to see if the Kojic acid brightening is actually a thing, only been using it a month+.

J
Jamie Wessel
Nice lather

Nice lather, doesn't dry out skin, and I'm on city water.
Been using the bar for a month, I notice a slight tightening of the red scars from insect bites, scratches, etc. Looks like there's is a month or more of bar left.

J
JV
Skin feels so much softer

I am already seeing the brightening of my elbows and knees and my skin feels so much softer and the effect lasts for days.

R
Roberto

Product works great will comtinue to purchase.

n
newgirl_k
works wonders!

I was skeptical at first when I purchased the soap but after finishing the bar completely I can honestly say I have see a difference. My under arms, elbows and knees were so hyper-pigmented but after using this I’m very happy with the results

J
Jesse Flores
Super Awesome

Super awesome! Says what it does. So glad to have found this product and has helped me tremendously. Look forward to purchasing more when I run out.

A
Anonymous
I love the Kojic Acid Brightening bar

I love the Kojic Acid Brightening bar. I have used it on my face with no irritation, to minimize my facial dark spots. I think it has been effective!

J
Jessica H

Great product and doesn’t irritate my skin. Pleasant smell too!

H
H.C.

Nice love it

S
Sydney
Works well!

I was surprised how well this worked for the darker pigmentation. I did not have a ton of pigmentation issues, but the areas I did have are normalizing within a week's time of daily use. I am also pleased with the lather and scent. Will purchase again.

D
Diane Berthon
The Kojic Acid Brightening Bar

Really like the way my skins feels.

H
Haniely Pableo

Love it!

J
J.
Why didn't I order this sooner???

I have to admit I am sometimes hesitant to order things I see on TikTok or Instagram, but I decided to bite the bullet and get the brightening bar. I have some dark spots on my body due to acne scaring and scratching allergic rashes until I bleed and have scabs. This soap has already faded much of the scarring so far and it makes my skin so super soft and moisturized. I ditched everything else I was using in favour of this and would recommend to anyone. A bonus is the fact that it comes from Canada and I'm happy to support Canadian businesses.

T
T.G.
Excellent Product

The Kojic Acid Brightening Bar lightened the darkened skin on my elbows immensely! I can’t wait to see how much lighter they get. This product softened my rough elbows as well. I’m very impressed with the performance of this product. 💖

S
Sabine
Amazing soap

Works gradually over time and highly effective at brightening and evening out overall skin tone. Also quite long lasting if you take care of it and don’t leave it in a puddle of water to dissolve like any other bar of soap. This has become my go-to soap year round. Just wish I could have a stockpile of it as it’s quite pricey!

S
Sadaf Navaid
Kojic and ingrown soap bar

The soap finished in 3rd bath only....it would have been better it lasted few more baths. Couldn't see any difference as I was not able to use it longer.
Same goes for ingrown soap bar.... some people wax the whole body and want to use it all over the body but it finished too quickly. Couldn't see any results.

H
Hollie Bedford
Best soap

Had problems with in grown hairs . So I got this soap works great haven’t had any AT ALL now that I use this soap. This is my second purchase.

M
Myra Ebalo
Noticed underarm got darker.

Been using the products for more than 3 weeks.
Noticed my underarm got darker.
Will still continue to use to and see how it goes.
If it doesn’t work will return the products.

A
Angela Rooke
Brightening bar

Love this product!

A
Anonymous

I've only used the product a couple of times but so far I am liking the smell and it feels like a quality soap. Will use the sample I have more often.

L
Leslie Littman

noticeable improvement in a short amount of time. appreciate the size of the bar, its scent, and its effectiveness. will be buying again

C
Cori

I switched to the Kojic bar from the Underarm bar because I could no longer tolerate the scent (Underarm bar smells like artificial-scented men's aftershave)
Back to Kojic, most important I can tolerate the natural scent and gives the charcoal deodorant a booster but I haven't noticed any color change in my skin.

H
Hailey

Great product, smells nice and is a good item in combination with other brightening Kaia products for underarm brightening.
Good travel size and easy to use, as it lathers well. It also smells nice!

L
Lysandra Laham

I got the trial size and it lasted me a couple weeks. I saw slight results. I think if I use it longer it will be more visable.

A
Arianne Bouchard-Fauteux

10-Oct

D
Deepika

I use it for my underarms, elbows and knees. It works slowly but will definitely give you results if you are persistent with it usage everyday

M
Mel

This bar is made of clean materials and it really does the trick! I am very pleased with it! I donƒ??t have to be so embarrassed about the darker spots under my armpits anymore when playing sports and waving, or just wearing tank tops in the Sun! Itƒ??s a big relief.