Ingredient guide · 3 min
Read a shampoo formula without making an ingredient blacklist
Start with the job, then read cleanser system, conditioning support, fragrance, instructions, and claims as parts of one formula.
Open the guideRead past the label.
Separate formula questions, laboratory results, clinical evidence, and dated recall records.
What you’ll take away
Know which questions a label can answer, which require a study, and which belong with a clinician.
15 minutes of reading · Follow in order or start with your questionEvidence guide · 3 min
The evidence behind bond builders
Bond builder is a category claim, not one mechanism. Compare formulas by the damage model, measured outcome, control, funding, and durability of the result.
Open the guideStudy reading guide · 3 min
What the rosemary-oil hair trial does—and does not—show
One small comparative trial is a reason for cautious interest, not proof that a DIY oil blend treats every kind of shedding.
Open the guideClaims audit · 3 min
How to audit a hair-supplement claim
Diagnosis, baseline status, full formula, trial design, funding, and lab-test interference belong in the decision before the testimonial.
Open the guideRecall desk · 3 min
How to check an old dry-shampoo recall against the can in your hand
The 2021 and 2022 U.S. benzene notices were product- and code-specific. Match brand, format, size, UPC, and lot before drawing a current conclusion.
Open the guideKeep going at your own pace. Save individual guides to revisit them in the working library.