How this works.

The heart of Glow is an eight-week program, and it is a fixed document. Every week's instructions, the reasoning behind them, and the honest paragraph about what that week may feel like are set text, the same eight weeks for everyone. Nothing composes your week on the fly, and nothing is generated for you. When the app tells you that week one is a cleanser, a moisturizer, and a morning SPF and nothing else, it is quoting that document, the same one every member follows, with two exceptions: an adapted version of three weeks for pregnancy, and honest copy when your routine lacks a step.

You do not have to take our word for any of this. The whole program is published at The eight weeks, in full, with a version line that names the last change to it. Read it before you decide.

Your routine is personal in one specific way: the program leaves slots, and software fills them with products suited to your quiz answers. That software is ordinary, deterministic code, a scoring engine that weighs ingredients against your concerns, prefers what you already own, and never sees whether a link earns us a commission. The shape of the eight weeks does not bend to it.

The program moves slowly on purpose. Week one strips your routine to three products and holds there. After that, anything new arrives separately, with time to record how your skin feels. Changing fewer things can make patterns easier to notice. It cannot rule out weather, hormones, medicines or other causes.

The useful part is the record you keep: which products were in your routine, what you changed, and how your skin felt. By week eight you can look back at the entries you made, including any gaps or products you chose not to use. Your notes can help you decide what to discuss with your dermatologist. They cannot prove which product caused a change, and Glow does not promise better skin or an answer about every product.

The eight weeks work best unbroken, because each week's read depends on seven days in a row with one change in them. Life does not always allow that, so here is the rule, and it is a kind one. A gap of three days or fewer is fine: you pick up on the day you left, and your logged days still count. A longer gap, or a longer pause, restarts the week you were in, so the read stays true. Only that week starts again. The weeks you finished stay finished, your notes stay, and nothing is taken away.

Nothing in the app punishes a gap. There is no streak to lose. If you go quiet we send at most three check-back emails, and you can switch every email off on your Profile page.

There is an AI in Glow. Her name is Glowie, she answers questions in chat, and we would rather describe her precisely than either hide her or dress her up. She applies the fixed program and the skincare knowledge base to your situation: your quiz answers, your logs, your current week. She does not write the program and she cannot change it.

She works inside rules she cannot alter. She does not diagnose, treat, or prescribe. When a question sounds medical, a changing mole, an infection, a persistent flare, a reaction, her instruction is to tell you to see a dermatologist rather than improvise. She cannot loosen the program's safety rules, let you run ahead of your current week, or change anything in the app on your behalf. And the filters that matter most do not depend on her judgment at all: the code that keeps retinoids away from a pregnant user, or chemical sunscreens away from someone with lupus, runs before she ever sees the product catalog, so the products she can suggest were filtered before she saw them.

The safety layer is written to be consistent with published guidance from the American Academy of Dermatology, and each rule in the code carries a note naming its source, so a developer reading it can trace every line. In practice the rules look like this: actives that increase sun sensitivity, retinoids, exfoliating acids, benzoyl peroxide, are scheduled at night only, and morning SPF stops being optional the day one enters your routine. For a pregnant user, or one trying to conceive, retinoids and hydroquinone are refused three separate ways, so a single mislabelled catalog entry cannot slip one through. And when a product's ingredient list cannot be verified, the system treats it as unsafe rather than assuming it is fine. When in doubt, it says no.

No clinical trial has been run on this program, and we will not imply otherwise. Glow is not medical advice, it is not a medical device, and it does not replace a dermatologist. Carolina is not a dermatologist and has never said she was. If you have a diagnosed skin condition, a suspicious mole, or anything causing you real concern, see a professional. You can download your record from the app to share the observations you logged.

What is left, once all of that is set aside, is the part we will defend without hedging: a fixed program, applied one change at a time, with space to record what you notice. If that sounds worth eight weeks, the quiz is where it starts.