HAIR CARE DESK · UNITED STATESPRACTICAL CALLEDITORIAL CHECK · 2026-08-26
STRAND REPORT

Claims, context, and what the bottle leaves out.

DECISION DESK

Interrogate a 446°F heat-protection claim

Find out what was tested, at what product amount, on which hair substrate, and against which damage endpoint.

6 SOURCE REFERENCESOWNED USE TEST NOT EXECUTEDU.S. ROUTINE CONTEXT

THE DESK'S CALL

The headline.

Our call: use the lowest effective temperature
02

ON THE RECORD

What keeps the headline honest.

This is an editorial conclusion from the stated context. It is not a claimed product trial, diagnosis, or universal ranking.

Decision change

Refuses to turn a maximum-temperature headline into permission for higher heat without disclosed test conditions.

Evidence boundary

The full protocol, comparator, primary criteria, sample size and profile, dispersion, and complete report are often not public.

03

What could overturn the headline.

THE COUNTER-CASE

  • A protection claim does not make repeated high-temperature styling harmless.
  • Uneven application can leave parts of the hair unprotected under the test logic.

STILL UNREPORTED

  • The full protocol, comparator, primary criteria, sample size and profile, dispersion, and complete report are often not public.
04

BUSINESS DESK

Commercial disclosure

This report contains no affiliate link or paid product placement. We do not turn manufacturer statements into owned findings, and we do not imply a product was used when no dated hands-on protocol exists.

EVIDENCE TRAIL

What the sources carry — and what the desk decides.

The linked sources support product status, labeling, or professional boundaries. They do not prove the editorial winner and they do not stand in for an owned test.

EDITORIAL JUDGMENT

Our call: use the lowest effective temperature

A reasoned course of action; not a product result measured by the source.
BOUNDARY OF THE CALL

A protection claim does not make repeated high-temperature styling harmless.

The full protocol, comparator, primary criteria, sample size and profile, dispersion, and complete report are often not public.

Primary and professional sources in the record

  1. Is It a Cosmetic, a Drug, or Both? (Or Is It Soap?)U.S. Food and Drug Administration
  2. Cosmetics Labeling ClaimsU.S. Food and Drug Administration
  3. Summary of Cosmetics Labeling RequirementsU.S. Food and Drug Administration
  4. 21 CFR Part 701 — Cosmetic LabelingOffice of the Federal Register / eCFR
  5. Health Products Compliance GuidanceU.S. Federal Trade Commission
  6. Hair cosmetics: an overviewMaria Fernanda Reis Gavazzoni Dias
Data and test conditions still required
Product function and category

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Ingredient list for the current version

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Amount, contact time, and frequency

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Starting hair-fiber condition

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Heat test and temperature conditions

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Evidence for the specific claim

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Instrumental measure and test conditions

Document against the current U.S. product version; keep missing or non-comparable information visibly open.

Assess heat protection under defined conditions

Define and retain the conditions, date, material, and outcome before presenting any owned observation.

Trace a general claim to its evidence

Define and retain the conditions, date, material, and outcome before presenting any owned observation.

Measure hair fiber reproducibly

Define and retain the conditions, date, material, and outcome before presenting any owned observation.