Most skincare content tells you what to add. This series is about the other decision — the one we make first. Every Indiefog formula starts with what gets left out, and each piece in this series takes one exclusion and gives it the full explanation it deserves.
We're starting with harsh acids, because they're the exclusion people ask about most — and the one where the industry's habits and reactive skin part ways most clearly.
What we mean by “harsh”
Let's be precise, because “acid” alone isn't the problem. Acids are a broad family, and plenty of them sit quietly in gentle formulas doing modest work.
What we leave out — brand-wide, no exceptions — is the high-percentage end of the category: strong glycolic and other AHA treatments, high-strength BHA formulas, at-home peels, and the layered acid routines built to deliver a visible reaction. The products designed to make skin sting, flush, and flake on a schedule.
That whole category is built on a single idea: that discomfort is evidence. The sting means it's working. The flaking means progress.
We don't formulate from that idea. Here's why.
The sting is a message. The question is how you read it.
When a strong acid meets skin, skin answers. You feel it immediately — the sting, the heat, the tightness that follows. In the days after, you may see it: a flushed look, dryness, visible flaking.
Conventional acid culture asks you to read all of that as a good sign. Tingling gets marketed as potency. Flaking gets celebrated as renewal you can see.
It asks you to interpret your skin's alarm signal as a compliment.
If your skin rarely reacts to anything, maybe that's a trade you can afford to make — feel the sting, trust the process, move on.
The people we formulate for don't have that luxury. If you have reactive skin, you already know the feeling of your whole system paying attention to something small. A sting is not background noise you can choose to ignore. It's loud. It lingers. And a product that manufactures that feeling on purpose — that's designed to produce it — is asking reactive skin to sit with an alarm going off and call it self-care.
We think that's a poor trade. So we don't offer it.
Renewal that takes longer and asks less
Leaving out harsh acids doesn't mean leaving out renewal. It means choosing the versions of it that don't announce themselves.
Where a conventional line reaches for a strong acid or an aggressive retinoid, here's what we reach for instead:
Enzymatic exfoliation — papain & bromelain
Fruit enzymes (from papaya and pineapple) that work at the surface, on skin that's ready to let go. No sting engineered in. Skin is left feeling smooth, not stripped.
Bakuchiol
The plant-derived alternative we use where other brands would use a strong retinoid. Skin gets the soft, conditioned feel — without the adjustment period that acid-and-retinoid routines treat as a rite of passage.
Niacinamide & panthenol
Steady, well-understood, comfortable. Skin is left looking even and feeling cushioned, and neither one asks anything in return.
The honest cost of this approach: it's slower. A peel gives you drama by Friday. Enzymes and bakuchiol give you skin that simply feels a little better, kept up over time. We'll take the slower version, because it's the one that doesn't ask reactive skin to pay an entry fee.
This isn't fear. It's fit.
We want to be careful here, because it would be easy to write this piece as a scare story, and that's not what it is.
Harsh acids aren't poison. Used knowingly, on skin that tolerates them, they do what they promise. If that's your skin, this isn't a warning aimed at you.
This is about fit. Indiefog exists for skin that feels everything — skin navigating eczema, psoriasis, MCAS, and the long list of situations where “just push through the purge” is not useful advice. For that skin, a product line with no sting anywhere in it isn't a limitation. It's the entire point.
That's the shape of every exclusion we'll cover in this series: not this ingredient is evil, but this ingredient asks something of skin that our formulas refuse to ask.
Could an acid ever earn its place here?
Maybe. This is a piece about what harsh acids ask of reactive skin — not a vow that no acid will ever appear in an Indiefog formula.
There's a quieter end of the acid family — azelaic acid and tranexamic acid are the two we hear about most — with a gentler reputation, even among people whose skin reacts to nearly everything. If one of them ever earns a place in our line, it will earn it the way every ingredient here does: low and slow, named plainly, formulated so skin doesn't have to brace for it.
But it isn't where our attention is right now. Everything we're formulating today serves one priority: the calm, settled, sensory-quiet baseline this line is built around. New actives — even gentle ones — come after that. Not before.
Left out on purpose
No high-percentage acids. No at-home peels. No strong retinoids. Nowhere in the line — not the facial products, not the butters, not the sets.
In their place: enzymes, bakuchiol, niacinamide, panthenol. Renewal that takes longer and asks less.
Synthetic fragrance — the most commonly reported trigger among the people we formulate for, and the hardest ingredient on any label to actually vet.