The short answer
The front of a supplement bottle is marketing. The Supplement Facts panel on the back is the part governed by regulation, and it is where the useful information sits. Eight things are worth checking every time: the serving size against the servings per container, whether any ingredient is hidden inside a proprietary blend, whether extract ratios are stated, whether mineral amounts are elemental or compound weight, what standardisation is claimed, what appears in the other ingredients line, whether third-party testing is verifiable, and whether a certificate of analysis exists for your specific lot.
In this guide
Why the Label Matters More Here Than Elsewhere
In the United States, dietary supplements are regulated under the Dietary Supplement Health and Education Act of 1994. The key consequence is that supplements are not reviewed or approved by the FDA before they go on sale. Manufacturers are responsible for the safety and labelling of their own products, and enforcement is largely after the fact.
That framework is neither a scandal nor a reassurance. It is simply the context. It means the burden of assessment sits further onto the buyer than it does in most categories, and the label is the primary tool you have.
The Eight Checks
1. Serving size against servings per container
Start here, because every other number on the panel is expressed per serving. A product showing an impressive amount at a serving size of four capsules is a different proposition from one showing the same amount in one.
This is also the only honest way to compare cost. Price divided by servings per container gives cost per serving. Price on the shelf tells you almost nothing.
2. Proprietary blends
A proprietary blend lets a manufacturer list several ingredients under a single total weight without disclosing how much of each is present. Ingredients are ordered by weight, so the first is present in the largest amount, but a blend listing eight botanicals at 500 mg total could be 450 mg of the cheapest and a dusting of the rest.
The original justification was protecting a formula from copying. In practice it more often conceals under-dosing. A formula that discloses every amount is making a verifiable claim. One that does not is asking you to take its word.
3. Extract ratios
You will see notations like 4:1, 5:1 or 10:1. This describes how much raw plant material went into producing a given amount of extract, with 4:1 meaning four parts raw herb concentrated into one part extract.
Two things follow. A gram of raw powdered root and a gram of 5:1 extract are not equivalent, and comparing them as if they were is a common error. And a phrase like equivalent to 3,250 mg is describing the raw herb the extract was derived from, not the weight in the bottle.
4. Elemental versus compound weight
This one catches nearly everyone, and minerals are where it matters.
Magnesium is never present as pure magnesium. It is bound to something, whether citrate, glycinate or oxide, and a label reading 250 mg of magnesium citrate is describing the whole compound. The elemental magnesium inside it is a fraction of that figure, and the fraction differs by form.
The practical consequence is that two magnesium products showing the same number can deliver quite different amounts of magnesium. Where the panel gives a percentage Daily Value, that figure is calculated on elemental content and is the more reliable comparison point.
5. Standardisation
Standardised to 95% curcuminoids. Standardised to 3% rosavins. This tells you the manufacturer has measured a specific marker compound and guaranteed a minimum level of it.
Standardisation is a meaningful quality signal because it implies batch testing. Its limitation is that a plant contains hundreds of compounds, and standardising one does not guarantee the rest, particularly where the marker chosen is convenient to measure rather than the compound that matters most.
6. The other ingredients line
Everything not considered active appears here, below the panel. Capsule material, fillers, flow agents, sweeteners, preservatives, colours.
It is worth reading rather than skipping. It tells you whether a capsule is gelatin or vegetable cellulose, which matters for vegetarian and some religious dietary requirements. It is where artificial colours and sweeteners appear. And a very long list on a simple product is a reasonable prompt to ask why.
7. Third-party testing claims
Third party tested is not a regulated phrase, and anyone can print it. What converts it from a claim into a fact is verifiability.
Certification programmes such as NSF, USP Verified and Informed Choice maintain public databases you can search by product, which is the strongest version. Short of that, a brand that publishes lot-level test results is making a checkable claim. A badge with no programme name and no published results is decoration.
8. The certificate of analysis
A COA is the laboratory report for a specific production lot. A complete one covers identity confirming the material is the species claimed, potency confirming the stated amounts, heavy metals, microbiological testing, and where relevant residual solvents.
Two things to check when you read one. The lot number on the COA should match the lot number printed on your bottle, since a COA for a different batch tells you about a different batch. And the testing laboratory should be named and independent of the manufacturer.
If a brand cannot produce a COA for the lot you own, that is worth knowing. You are entitled to ask, and how a company responds to the question is informative in itself.
Claims, and What the Asterisk Means
Supplement labels carry structure and function claims, phrases like supports immune function or helps maintain healthy sleep. These describe an effect on normal body structure or function and are permitted without pre-approval, provided the brand holds substantiation and prints the disclaimer.
That disclaimer is the asterisked line: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
What is not permitted is a disease claim, meaning a statement that a product treats, prevents or cures a condition. A label claiming to lower cholesterol, treat depression or cure anything has crossed a line, and a brand willing to cross it on the label is telling you something about how it operates elsewhere.
Separately, made in an FDA-registered facility means the facility appears on a register. It is not an FDA endorsement, an inspection result, or an approval of the product made there.
A Practical Sixty-Second Routine
- Turn the bottle over and find the Supplement Facts panel.
- Check the serving size, then divide the price by servings per container.
- Scan for the words proprietary blend.
- Find the two or three ingredients you actually care about and confirm each is individually disclosed.
- Read the other ingredients line.
- Look for a named testing programme or published results rather than an unattributed badge.
If the panel survives that, you are dealing with a brand that expects to be read. Herbana publishes full per-ingredient amounts with no proprietary blends across every formula, and every batch is third-party tested, which means these checks are ones we expect you to run on us too.
Frequently Asked Questions
What is a proprietary blend on a supplement label?
A group of ingredients listed under one combined weight without disclosing the amount of each. Ingredients appear in descending order by weight, but you cannot tell whether the second and third are present at meaningful levels or in trace amounts.
What does 4:1 extract mean?
Four parts of raw plant material were concentrated into one part of extract. It is a measure of concentration, and it means a gram of 4:1 extract is not comparable to a gram of raw powdered herb.
What is the difference between elemental and compound weight?
Minerals are bound to a carrier compound. A label showing 250 mg of magnesium citrate refers to the whole compound, and the elemental magnesium within it is a fraction of that. Where a percentage Daily Value is given, it is based on elemental content and is the fairer comparison.
How do I get a certificate of analysis for a supplement?
Ask the brand directly, quoting the lot number printed on your bottle. Many publish them on request or in a public library. Confirm the lot number on the certificate matches yours, and that the testing laboratory is named and independent.
Does FDA-registered mean FDA-approved?
No. It means the facility is listed on an FDA register. It is not an approval, an endorsement, or a statement about the specific product manufactured there. Dietary supplements are not FDA-approved before sale.
Why do supplement labels have an asterisk and a disclaimer?
Because the product carries structure and function claims rather than disease claims. Federal rules permit those claims without pre-approval on the condition that the disclaimer appears alongside them.
Keep Reading
- Magnesium glycinate vs citrate vs L-threonate
- Glycerin vs alcohol tinctures: an honest comparison
- What not to take together: a supplement spacing guide
Read Our Labels Too
Every Herbana formula discloses the full amount of every ingredient. No proprietary blends, no hidden doses, and third-party testing on every batch.
See Every Formula*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
