Sunny Disposition: The Gentle Lactic Acid Exfoliant Your Brightening Routine Is Missing (20% Off All October)

Here's a skincare plot twist: you can treat pigment beautifully and still not see it leave as fast as you'd like. Not because the treatment didn't work, but because the pigment has nowhere to go. The cells holding onto it are still sitting on the surface of your skin, waiting to be shed.

That's the problem Sunny Disposition was built to solve. It's our 10% lactic acid exfoliant, and it's this month's featured product, 20% off all of October. It brightens, smooths, and hydrates in the same step, and it's gentle enough for the patients who usually have to sit out the exfoliation conversation entirely: sensitive skin, rosacea-prone skin, and oily skin that reacts to everything.

Here's what's in it, how it works, and why we reach for it so often at our Nashville practice.

What Is Sunny Disposition?

Sunny Disposition is a pharmaceutical-grade exfoliating treatment built around 10% lactic acid, a dual-action alpha hydroxy acid (AHA) that gently exfoliates while it hydrates. The goal is smoother, brighter skin without the tight, stingy, over-scrubbed feeling a lot of exfoliants leave behind.

Alongside the lactic acid, the formula includes:

• Hyaluronic acid, a humectant that pulls water into the skin and helps keep it there
• A peptide complex to support the look of firmer, smoother skin
• A humectant system that works with the lactic acid and HA to keep the skin hydrated
• Micronutrients that help nourish the skin while it renews

Put together, it's an exfoliant that behaves more like a treatment serum than a harsh acid. Many patients notice their skin looks smoother and more even, with pores, fine lines, and wrinkles that appear less pronounced over time.

Why Lactic Acid Is the Gentle AHA

Not all AHAs behave the same way. Glycolic acid is the smallest AHA molecule, which means it penetrates quickly, and that speed is exactly why it can be too much for reactive skin. Lactic acid is a larger molecule, so it works more gradually at the surface. That's a big part of why it tends to be better tolerated by sensitive skin.

Exfoliation That Also Hydrates

This is where lactic acid really earns its spot. Most exfoliants take something away. Lactic acid gives something back. It loosens the bonds between dead skin cells so they can shed more evenly, and it's also part of the skin's own natural moisturizing factor, the set of compounds your skin uses to hold onto water. Research on lactic acid supports its role as a moisturizing ingredient, not just an exfoliating one.¹ Add hyaluronic acid on top, and Sunny Disposition hydrates on two fronts at once.

More Than Surface Work

AHAs don't just polish the top layer. Studies show AHAs can influence deeper skin activity, including supporting collagen production, which is part of why consistent use may soften the look of fine lines and improve overall texture over time.² That's the "dual action": immediate smoothness up top, longer-term support underneath.

Is Lactic Acid OK If I'm Lactose Intolerant?

Yes. This one comes up a lot, so let's clear it up. The lactic acid in Sunny Disposition is not derived from milk, and lactic acid isn't lactose. Lactose intolerance is a digestive issue: your gut has trouble breaking down the sugar in dairy. Applying lactic acid to your skin doesn't involve your digestive system at all. It works in the outer layers of the skin, so it's not a concern for patients who avoid dairy.

The Keratinocyte Problem: Why Exfoliation Matters for Pigment

This is the part we explain in consults almost every day, and it changes how patients think about their brightening routine.

Pigment (melanin) is made by cells called melanocytes, but it doesn't stay there. Melanocytes package melanin and hand it off to keratinocytes, the main cells that make up the outer layer of your skin. Those keratinocytes hold onto the pigment as they travel up toward the surface.³

So when you treat pigment in-office, like with BBL HERO, the treatment can target pigment deeper in the skin. But the keratinocytes that already absorbed pigment are still holding it. If those cells aren't shedding efficiently, that pigment lingers at the surface longer than it needs to.

That's where Sunny Disposition comes in. Regular exfoliation helps those pigment-loaded cells turn over and shed, so your skin can actually let go of what's been treated. Think of BBL HERO as working on the source, and Sunny Disposition as clearing out the backlog. Using them together means you're not leaving half the job undone.

Part of Our Brightening Protocol

Because of all this, Sunny Disposition is a core piece of our brightening protocol. Pigment correction at Hi, Finch is a long game. It usually starts with a series of 3–6 in-office treatments, followed by maintenance every 3–4 months to hold onto results. Your at-home routine is what keeps things moving between visits, and an exfoliant like Sunny Disposition is a big part of that.

Who Sunny Disposition Is For

Short answer: more people than you'd expect.

Sensitive and Hypersensitive Skin

If your skin turns red at the sight of an exfoliant, Sunny Disposition was made with you in mind. The lactic acid works gradually, and the hydrating ingredients help buffer the experience, so you get the brightening without the burn.

Rosacea-Prone Skin

Patients with rosacea are often told to skip exfoliation entirely. Sunny Disposition can be used on rosacea-prone skin, which means you don't have to choose between calm skin and smooth, bright skin. If you're actively flaring, check in with us first and we'll help you time it.

Oily Skin

Oily skin still needs hydration, and stripping it usually backfires with more oil. Sunny Disposition clears away buildup that can make pores look bigger, while keeping the skin hydrated instead of tight. We see this a lot in Nashville summers, when patients over-cleanse and over-strip trying to fight the humidity.

Anyone Treating Pigment

If you're in a brightening plan, doing BBL HERO, or just trying to fade sun spots and uneven tone, an exfoliant is non-negotiable. See the keratinocyte section above. That's your why.

How to Use Sunny Disposition in Your Routine

Sunny Disposition fits into your routine easily, but timing matters if you're using other actives.

If You Use Retinol at Night, Use Sunny Disposition in the Morning

This is the big one. If retinol is part of your evening routine (like 4 Birds Retinol), apply Sunny Disposition in the morning instead. Splitting them up gives you the benefits of both without overloading your skin with two strong actives at once.

Always Follow With SPF 50

Any time you exfoliate, your fresh new skin is more vulnerable to sun damage, and sun exposure is one of the biggest drivers of pigment in the first place. If you're using Sunny Disposition in the morning, finish with SPF 50 every single day. Otherwise you're brightening with one hand and undoing it with the other.

Basic Routine

1. Cleanse and pat dry.
2. Apply Sunny Disposition to clean skin.
3. Follow with the rest of your routine, like a hydrating serum and moisturizer.
4. Finish with SPF 50 in the morning.

Your provider will tell you how often to start. Many patients begin a few times a week and work up from there as their skin adjusts.

Why Now: 20% Off All October

Fall is a great time to focus on pigment. Summer sun tends to leave behind spots and uneven tone, and the lower UV months are when many patients start (or restart) their brightening plans, including BBL HERO. Sunny Disposition is 20% off all October, so it's an easy time to add it to your routine or stock up.

It Pairs Perfectly With Our October BBL HERO Special

Remember the keratinocyte problem? This is where it all comes together. All October, we're also running a BBL HERO special:

• $100 off BBL HERO for the face
• $200 off BBL HERO for the face, neck, and chest

BBL HERO works on the pigment, and Sunny Disposition helps your skin shed the pigment-loaded cells at the surface. Starting both this month means your in-office treatments and your at-home routine are working together from day one. And because pigment correction is a series, not a one-and-done, October is a smart time to get your plan started.

Frequently Asked Questions

Can I use Sunny Disposition if I have rosacea?

Yes. Sunny Disposition is formulated to be gentle enough for rosacea-prone and sensitive skin. If you're in an active flare, reach out to us first so we can help you decide when to start.

Can I use Sunny Disposition and retinol together?

Yes, just not at the same time. If you use retinol at night, use Sunny Disposition in the morning. This lets you get the benefits of both without overwhelming your skin.

Is lactic acid safe if I'm lactose intolerant?

Yes. The lactic acid in Sunny Disposition isn't derived from milk, and lactic acid isn't the same thing as lactose. Lactose intolerance affects digestion, and a topical exfoliant works in the outer layers of the skin, so it isn't a concern.

Why do I need an exfoliant if I'm already doing BBL HERO?

BBL HERO can target pigment deeper in the skin, but the keratinocytes at the surface may still be holding onto pigment. Exfoliating helps those cells shed, so your skin can clear the pigment more efficiently. The two work best together.

Will Sunny Disposition dry out my skin?

It's designed not to. Lactic acid is a hydrating AHA, and the formula also includes hyaluronic acid and a humectant system, so many patients find their skin feels smoother and more hydrated, not tight.

Want to add Sunny Disposition to your routine while it's 20% off? Grab it at hifinch.com, or book a consultation and we'll build a brightening plan around it, BBL HERO special included. Questions first? DM us @hi_finch.

References

1. Algiert-Zielińska B, Mucha P, Rotsztejn H. Lactic and lactobionic acids as typically moisturizing compounds. Int J Dermatol. 2019;58(3):374-379. doi:10.1111/ijd.14202
2. Tang SC, Yang JH. Dual Effects of Alpha-Hydroxy Acids on the Skin. Molecules. 2018;23(4):863. doi:10.3390/molecules23040863
3. Moreiras H, Seabra MC, Barral DC. Melanin Transfer in the Epidermis: The Pursuit of Skin Pigmentation Control Mechanisms. Int J Mol Sci. 2021;22(9):4466. doi:10.3390/ijms22094466