Curl Diagnostic System
Understand what your curls are responding to.
A science-based curl operating system: diagnosis, profile, chapter path, 7-day reset, wash tracker and troubleshooting. Built around how your hair behaves, not a curl type chart.
Early-bird pricing. One-time purchase. No subscription.
Public diagnostic preview
The full Curl Diagnostic Quiz has ten questions and generates your complete profile — porosity, protein-moisture balance, fiber condition, climate compatibility, and a prioritized chapter path. This preview runs the first three.
Question 1 of 3
How does your hair feel after washing?
Porosity signal
Partial diagnostic profile
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Your complete diagnostic includes 10 questions, a full hair profile across five dimensions, a personalized chapter path, and a 7-day Curl Reset Protocol.
Get your full diagnostic — $29What you get
Curl Diagnostic Quiz
Ten questions covering scalp, fiber condition, porosity, protein-moisture balance, climate, and pattern. One question at a time. Result generates without a submit button.
Curl Profile
Your personalized hair profile: current condition, care priority, recommended and contraindicated ingredients, and your starting point in the content.
Personalized Chapter Path
The 15 chapters reordered by relevance to your profile. You read what matters to your hair first, not the index in alphabetical order.
7-Day Curl Reset Protocol
An actionable seven-day plan generated from your profile. Adjusted for scalp type, damage level, and climate. Not a general routine — your variables, your protocol.
Wash Day Tracker
A structured log to track results by wash day: what you used, how your hair responded, and which variables to adjust next time.
Troubleshooting Engine
Choose a symptom — frizz, breakage, buildup, lack of definition. The system returns probable cause, first action, what to avoid, and the relevant chapter.
15 Scientific Chapters
Porosity mechanics, protein-moisture balance, cuticle behavior, scalp biology, INCI ingredient analysis, climate variables, and damage classification — 68 cited sources.
Research-backed
Rizzado does not ask you to memorize cosmetic chemistry. It uses the research as a map: what signal to observe, what variable to adjust, and what to stop changing at random.
Curl shape changes fiber stress.
The app treats definition loss and breakage as fiber behavior, not just styling failure.
Westgate et al. 2017 · Franbourg et al. 2003
Elasticity is a practical signal.
Your profile uses stretch, snap and wet texture to decide whether the next move is protein, moisture or restraint.
Robbins 2012 · Sandhu & Robbins 1993
Not every oil does the same job.
Rizzado separates penetrating oils, surface lubricants and sealing decisions by fiber condition.
Keis et al. 2005 · Rele & Mohile 1999/2003
Porosity is a state, not an identity.
Damage, minerals, heat and weather can shift how your hair absorbs and retains water.
Robbins 2012 · NYSCC 2021
The scalp sets the routine boundary.
If scalp signals are present, the app prioritizes cleansing rhythm and clinical caution before styling layers.
Clavaud et al. 2013 · Park et al. 2017
Buildup changes product behavior.
The tracker asks what was used and how the next wash behaved, so product failure is not treated as a mystery.
Gavazzoni Dias 2015 · D'Souza & Rathi 2015
Drying method changes damage risk.
The protocol treats diffuser, distance and heat as variables, not afterthoughts.
Lee et al. 2011 · McMullen & Jachowicz 1998
Humidity affects hold.
Troubleshooting connects frizz and collapse to weather, film formers and product weight.
Wortmann et al. 2013 · Cosmetics & Toiletries 2020
Inside the product
The profile isn't a personality type. It's a functional read of your hair's current state — porosity, protein balance, scalp condition — and what to address first.
It names the current working hypothesis and turns it into ingredients, behaviors and chapters to prioritize.
Base wash: observe, do not change everything.
No manipulation: see what holds without interference.
Minimal refresh: test the smallest useful adjustment.
Change one thing: record the variable.
Seven days of controlled observation make your routine easier to adjust without guessing.
Porosity
The content is organized as a personal reading path, so learning supports the next decision.
Access
Early-bird · One-time payment
$29
Complete access to the diagnostic system, all 15 chapters, and all tools. No subscription. No expiry.
15-day guarantee · Instant access · Works on any device
For whom
Adults with wavy, curly, or coily hair who have tried enough generic routines and want to understand what their specific hair needs — not what the internet says curly hair needs.
Not for you if
You want a ten-step influencer routine, a miracle product recommendation, or confirmation that what you're already doing is right. The diagnostic might tell you to simplify, change direction, or address something you haven't considered.
Questions
It's a diagnostic web app for wavy, curly, and coily hair. You complete a ten-question quiz that evaluates your scalp, fiber condition, porosity, protein-moisture balance, and environmental variables. The system returns a personalized Curl Profile, a chapter reading path ordered by relevance to your specific hair, and a seven-day protocol.
The educational content — 15 chapters covering the real science of curly hair — exists as a destination reached through your diagnosis, not as a generic index. There are also a Wash Day Tracker and a Troubleshooting Engine for ongoing use.
Yes. The entire product — diagnostic quiz, profile, chapters, tracker, and troubleshooting engine — is fully responsive. It works on phones, tablets, and desktop browsers. There is no app to download. Access is instant via browser.
After payment you will receive an access email. Open it, create your password, and log in from any browser. Your purchase access is permanent. Your diagnostic progress is stored locally in your browser's storage.
15 days from the date of purchase. If you've completed the diagnostic and the product doesn't give you useful, specific information about your hair, contact support for a full refund. No forms, no conditions.
The 15 chapters cite 68 peer-reviewed sources. The diagnostic questions use functional observational criteria (how your hair absorbs moisture, how it behaves under stress) rather than low-reproducibility tests like the float test. Porosity is treated as a variable state, not a fixed identity — because that's what the research shows.
The product does not make medical claims and does not replace a dermatologist. For scalp conditions like seborrheic dermatitis, it explicitly recommends clinical evaluation.