: What is the meaning of "trial treatment"? I was searching online for homemade herbal remedies to decrease hairfall. And there was this website that had the solution I was looking for. Towards the end of the write up, the

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Even from the context, a definite answer cannot be given. However, I'll do my best to shed some light on relevant terminology.
The sentences:

"this is a 90% trial treatment of hairfall."
this is a 99 trial treatment of mail pattern baldnes

really don't mean anything on their own. Since the article mentions clinical trials, and the numbers 90, 95 and 99 are characteristic, my best guess would be that this refers to the confidence level, a statistical term which (long story short) describes the probability that the conclusion from your study that the tested medicine is better than the other is correct.
So, why not just say it like that? (We'll get back to that.)
There is another part of this article:

Double-blind studies determine [xyz] to be the best hair-restoration product on the market.

This sentence is rather imprecise, and therefore sounds a bit boastful.
When the study is double-blind it means that neither the patient nor the researcher knows which patient is receiving the tested substance, and which something else, until the end of the trial. So one group of patients receives the substance being tested (test group) and the other either an alternative substance used for the same condition (control group) or an inert substance, i.e. placebo (placebo group).
The first sort of trials (where you compare a new substance to an old one) are called controlled, double-blind trials. Here you can test whether your new substance is better that the old one (superiority trial), that the new substance isn't worse than the old one (non-inferiority trial) and that they are equivalent (equivalence trials). You can do something similar by comparing your substance with placebo in a placebo controlled, double-blind study, but here you would want your substance definitely to be better than placebo.
The statement that something is "the best in the market" implies that the substance/preparation is tested against (all) others on the market, but it doesn't specifically say so, does it? What's more, which other products has it been compared to, exactly? If they are not allowed to name competitor's brands, surely they could give the chemical names of other substances used as controls, or at least say how many other products have they compared theirs to. (Note that usually one comparison is one separate clinical study. More studies -> more expenses for the company).
Why haven't they addressed these issues? We can't know. Can it be that the explanation is tailored for everyone to understand? Or that some things one wouldn't boast about were just omitted?
I can only suggest that you ask a health care professional from the field, whether they have some experience with the product. If it were registered as a medicine, it would be possible to find the information on clinical trials in the Summary of Product Characteristics (usually available on the website of the medicines regulatory agency of the country where the medicine is registered). On the link that you provided (after a few clicks) it says that this is a supplement. They don't have to comply with the same regulatory requirements (don't have to submit all the data that medicines do), so I can't say where you can find the missing information.

Ref: clinicaltrials.gov/ct2/about-studies/glossary www.rds-sc.nihr.ac.uk/planning-a-study/study-design/quantitative-studies/clinical-trials/non-inferiority-trials/