1. Where was it tested?
| Type | What it can show | Example |
|---|---|---|
| Test tube (in vitro) | Whether a substance has a chemical activity, such as antioxidant enzyme activity, under lab conditions | A 2020 study measured antioxidant enzymes in fresh grapes and raisins from two Turkish regions. A 2023 lab analysis did the same for a mix of noni, B vitamins, zinc, CoQ10 and chromium. |
| Animal (in vivo) | Whether a substance has an effect in a living animal, often at doses people would not take | Many noni studies were done in mice or rats. A 2016 review of noni lists dozens of them. |
| Human, no control group | Whether a marker changed in people who took something | Three studies of a noni, omega-3 and blueberry-extract combination compared people with themselves before and after. |
| Human, randomized and placebo-controlled | Whether the product, rather than something else, caused the change | The standard for showing an effect. Ask whether one exists for the exact product. |
Lab and animal studies are where research starts. Most substances that look promising there do not show the same effect in people.
2. Was there a comparison group?
Without a group that got a placebo, a change can come from other things: people eat better or take their medicines more carefully during a study, extreme values drift toward average on their own, and people who drop out are not counted. A control group, ideally with random assignment and neither side knowing who got what, is the way to separate the product from everything else.
3. What exactly was tested?
- An ingredient is not a product. A study of a fruit extract does not test a branded drink that contains some of it.
- A combination is not each part. If three supplements were taken together, you cannot tell which one did what.
- Check the dose and form. Juice, powder, extract and drops can contain very different amounts.
- A marker is not an outcome. A change in a blood or ultrasound marker is not the same as feeling better or avoiding disease.
4. Who did it, and where was it published?
- Funding and ties: industry-funded research can be good, but it should be stated. Look at the funding and acknowledgments sections, not only the conflict-of-interest line.
- Format: a conference abstract is a short summary that has not gone through full peer review. A full paper in a recognized journal gives far more detail.
- Replication: one study, or several from the same group, is a starting point. Independent groups finding the same thing is stronger.
5. Red flags in supplement marketing
- Personal stories of cures or of stopping prescribed medicine. Never stop a medicine without your clinician.
- Big percentages without a source you can open and read.
- Phrases like “clinically tested” with no named, published study of the exact product.
- Claims to treat, cure or prevent diseases. In the US, dietary supplements may not make such claims, and the FTC expects health claims to be backed by competent and reliable scientific evidence.
How we apply this on GetGutBrain
On this site, product pages stick to what Amare lists on the label. Our guides describe research with its type, design and limits, and we do not repeat testimonials or outcome numbers as product promises. If you spot a claim that does not meet this standard, please tell us via the About page.
Sources and further reading
- NCCIH: Know the Science – how to make sense of health research
- NIH Office of Dietary Supplements: Dietary Supplements – What You Need to Know
- US Federal Trade Commission: Health Products Compliance Guidance (2022)
- Ali, Kenganora & Manjula: Health benefits of Morinda citrifolia (noni): a review (Pharmacognosy Journal, 2016)
- Demir, Güler & Demir: Determination of some antioxidant enzyme activities in fresh and dry grapes (Van Med J, 2020)
- Demir & Yılmaz: Antioxidant activities in a supplement mixture containing noni, vitamin B3, zinc, vitamin B1, CoQ10 and chromium (Current Researches in Health Sciences-IV, 2023)
- Yilmaz et al.: Effect of corrected inflammation, oxidative stress and endothelial dysfunction on FMD levels in patients with selected chronic diseases (Sci Rep, 2020)
Sources provide context and limitations; they do not turn a general education page into medical advice.
Quick answers
What is the difference between in vitro and in vivo?
In vitro means in a test tube or dish, outside a living body. In vivo means in a living organism, such as an animal or a person.
Why does a control group matter?
It shows what would have happened without the product. Without one, changes from diet, medicines, chance or simply being in a study can look like an effect.
Is a conference abstract a published study?
It is a short summary presented at a meeting. It usually has not gone through full peer review and gives too little detail to judge the study well.
Does “clinically tested” mean “proven to work”?
No. It only means some kind of study was done. Ask what kind, in whom, with what comparison and whether it used the exact product.