The Science
Almost nobody explains why the dots are there. So before the papers, here is the actual mechanism.
What the dots actually are
Most people believe the dark specks on their shins are hair trapped under the skin. That belief sends you to the razor and the scrub, and it is the reason years of effort go nowhere.
They are not hair. They are the follicle opening itself, packed with a mixture of keratin and oil. When that plug is exposed to air it oxidises and darkens, in exactly the way a blackhead does on a face.
The clinical term is an open comedo. Which is to say: the dots on your legs are blackheads.
Shaving does not cause them. A blade cuts the hair off flat at the surface, so the dark cross section sits right at the top of an opening that was already widened and already full. Shaving does not create the dot. It makes it easier to see.
Why it keeps coming back
There is a second half to this, and it is the part that explains recurrence rather than appearance. Call it the dryness loop.
Dry skin does not shed cleanly. Dead cells pile up around the follicle opening and widen it. A wider opening traps more keratin and oil. That looks worse, so you scrub, which irritates the follicle and strips the skin further, which makes it drier still.
Round it goes. It is why the problem is worst in winter, why it returns within days of every scrub, and why moisturising alone has never touched it.
Why scrubbing cannot fix it
A scrub, a mitt or a dry brush abrades the very top layer of skin. The plug sits inside the opening, below that layer. Physical exfoliation removes material from around the problem without ever reaching it, and it irritates the follicle on the way past.
What is needed is a chemical exfoliant, which works differently. An alpha hydroxy acid loosens the bonds holding dead surface cells together so they shed on their own, including the cells crowding the opening.
Lactic acid is the one worth using here for a specific reason: it is the only common AHA that is also a humectant, meaning it holds water in the skin while it works. It clears the comedo without drying you out and restarting the loop. A stronger, drying acid can clear the plug and quietly feed the cause at the same time.
So the mechanism is settled. The only real question left is whether there is enough acid in the bottle to act on it. That is what the rest of this page is about.
Every number on our label comes from somewhere. Here is where.
Most body care asks you to trust an adjective. We would rather show you the papers and let you decide whether the amount in the bottle is enough to do anything. Below are the three studies that shaped this formula, what each one actually found, and just as importantly, what they do not prove.
1. Why 12%, and not 5%
Smith WP. Epidermal and dermal effects of topical lactic acid. Journal of the American Academy of Dermatology, 1996;35(3 Pt 1):388–391.
Participants applied either 5% or 12% lactic acid twice daily for three months.
The 12% group showed increased epidermal and dermal firmness and thickness, along with clinical improvement in skin smoothness. The 5% group showed changes at the surface and in the epidermis only, with no dermal change observed at all.
This is the single study most responsible for the number on the front of our bottle. Below roughly 10%, lactic acid is doing surface work. At 12% it reaches further. Most drugstore "exfoliating" body lotions sit at or under 5%.
Read the abstract on PubMed (PMID 8784274)
2. Why buffered, and why it keeps working
Rogers RS 3rd, Callen J, Wehr R, Krochmal L. Comparative efficacy of 12% ammonium lactate lotion and 5% lactic acid lotion in the treatment of moderate to severe xerosis. Journal of the American Academy of Dermatology, 1989;21(4 Pt 1):714–716.
A double-blind comparison of 12% ammonium lactate against 5% lactic acid on moderate to severe dryness, applied twice daily for three weeks, followed by three weeks of no treatment at all.
The 12% ammonium lactate was significantly more effective in both phases: during treatment, and during the regression period after everyone stopped.
Ammonium lactate is lactic acid that has been buffered, meaning partially neutralised so it sits at a skin-friendly pH instead of the pH 2 or so of the raw acid. That is what makes a concentration this high usable every single day rather than something you brace yourself for. It is the same approach behind the ammonium lactate lotions dermatologists have recommended for decades. Ours is held at pH 4.4 to 5.4.
Read the abstract on PubMed (PMID 2808786)
3. The closest research to bumpy, dotted skin
Kootiratrakarn T, Kampirapap K, Chunhasewee C. Epidermal permeability barrier in the treatment of keratosis pilaris. Dermatology Research and Practice, 2015;2015:205012.
A randomised comparison of 10% lactic acid against 5% salicylic acid, applied twice daily for twelve weeks, in people with keratosis pilaris, the rough bumpy texture most often found on the backs of arms and thighs.
Mean reduction in lesions from baseline was 66% for 10% lactic acid and 52% for 5% salicylic acid. Both groups showed improved stratum corneum hydration, and that improvement held through the follow-up period.
Two honest caveats on this one. It used 10%, not 12%. And it studied a diagnosed skin condition, which is a different thing from the cosmetic appearance of texture. We include it because it is the most relevant published work on this ingredient for this kind of skin, not because it is a study of our product.
Read the full paper (open access)
What this does not prove
We would rather say this plainly than let you infer something we cannot support.
- These are studies of lactic acid, not of our finished lotion. We have not run a clinical trial on the Verra formula. Anyone who tells you their whole product is "clinically proven" on the strength of ingredient research is stretching it.
- Two of the three are from 1989 and 1996. They remain the reference work on concentration, which is why they are here, but they are old and the groups were small.
- None of this is a treatment claim. The Verra Smoothing Body Lotion is a cosmetic. It is intended to improve how skin looks and feels. It is not a medicine and it does not treat any condition.
- Results vary between people. Skin turns over in roughly four weeks, so two cycles, around eight weeks, is a fair test of texture. Returns are a separate thing and run for 30 days, which is well inside the window for knowing whether the product suits your skin.
What is in the bottle
Lactic acid 12% (as buffered ammonium lactate) · Niacinamide 4% · Glycerin 8% · Ceramides NP, AP and EOP · Squalane · Panthenol · Allantoin · Preservative system. pH 4.4 to 5.4.
No fragrance. No dye. No mineral oil. No essential oils.
Alpha hydroxy acids increase sun sensitivity, and that persists for about a week after you stop using them. Wear sunscreen on exposed skin.
If you have read this far
You now know more about why the dots are there than almost anyone selling you something for them.
Twelve percent lactic acid, buffered to pH 4.4 to 5.4 so it can be used daily, with ceramides and niacinamide so daily use does not wreck your barrier. One pump, once a day, on dry skin.
It is slow. Weeks one and two it gets softer. Weeks three and four look like nothing is happening. Week five to eight is where texture starts to shift. We would rather tell you that now than have you give up at week three.
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