Can I say it?
Can I say “all natural” in a supplement ad?
It depends. 2 rules fired across 3 sample sentences, and the checker's own text explains why.
The short answer
It depends. The bare phrase draws a warning, not a block. Add a few more words around it and the checker blocks it: 1 of 3 samples below hit a blocking rule. The first rule it hits is CG-EFF-004. Its reason: Natural does not mean safe, and the claim implies a safety profile you must substantiate.
Source the rule cites: FTC Act section 5; FTC Health Products Compliance Guidance
Checked as an ad promoting a supplement or wellness product.
A clear result is not an all-clear. The checker flags wording for review and does not know your evidence, your state or your platform's review. Read the limitations.
Sample wording, run through the checker
These are sentences written to contain the phrase, not real claims. Each ran through the real engine and the shipped rule-set when this site was built.
All natural, so it is safe.
- Warning
CG-EFF-004Efficacy and proof. Matched: “natural, so it is safe”
Non-toxic and chemical free.
- Warning
CG-EFF-004Efficacy and proof. Matched: “chemical free”
An all natural cure with no chemicals.
- BlockingCG-DIS-001Disease claims. Matched: “cure”
What to say instead
This version came back with no rule fired:
Our formula is made from plant extracts. See the label for the full ingredient list.
What the rules themselves suggest:
- CG-DIS-001 Describe what the service does (for example "supports", "helps manage") and name only outcomes you can substantiate.
- CG-EFF-004 List ingredients and known cautions instead of equating natural with safe.
The rules behind this answer
Reason, source and citation for each rule that fired, in the checker's own words. Blocking rules come first.
CG-DIS-001 · Blocks approval · Citation checked against stored text
Saying a product or service cures a condition makes it an unapproved drug claim.
Source: FDCA 201(g)(1), 21 U.S.C. 321(g)(1) (drug definition); 21 CFR 101.93(g) (disease claims); FTC Health Products Compliance Guidance
Safer wording: Describe what the service does (for example "supports", "helps manage") and name only outcomes you can substantiate.
21 CFR 101.93(g), 21 U.S.C. 321 · Needs counsel review
CG-EFF-004 · Warns
Natural does not mean safe, and the claim implies a safety profile you must substantiate.
Source: FTC Act section 5; FTC Health Products Compliance Guidance
Safer wording: List ingredients and known cautions instead of equating natural with safe.
See source text · Needs counsel review
Background: Substantiation in the glossary.
Questions
Which rule covers natural and chemical-free claims?
Rule CG-EFF-004. The rule's reason: Natural does not mean safe, and the claim implies a safety profile you must substantiate.
What should I write instead?
The rule's own suggestion for rule CG-EFF-004: List ingredients and known cautions instead of equating natural with safe.
If the checker shows nothing, can I publish?
No. A clean result means none of the checker's rules matched. It does not weigh your evidence, your state or your platform's review, and it is not legal advice. Read the limitations page for what it misses.
Next step
Check your own wording
Paste your copy into the free checker. Every flag names its rule and its source.