Why We Third-Party Test Every Batch

Certificates of analysis, what they cover, and what they do not.

The short answer is that it depends on the form, the dose and what you are actually trying to change. The long answer is below, with the trials that support it and, where they exist, the ones that do not.

What the trials measured

Most of the studies here are small - thirty to eighty participants - and run for eight weeks or less. That is enough to detect a large effect and nowhere near enough to rule out a small one, which is worth holding in mind before reading any single result as settled. Where a meta-analysis exists we have cited it in preference to the individual trials, and where the meta-analysis disagrees with the popular summary we have said so rather than quietly picking the flattering one. Several of the most-shared findings in this area come from a single trial that has never been replicated, and a reader deserves to know which ones.

Dose, form and timing

The dose used in a trial is frequently several times what a commercial product provides, and the form is often not the one on the shelf. Both matter more than the headline. An ingredient that works at 400mg of one salt tells you very little about 50mg of another, and a study that dosed with a meal tells you little about taking it on an empty stomach. Where we know the form used, we have named it. Where the paper did not say, we have said that too, because an unstated form is a real limitation rather than a detail to be glossed over.

Who this is unlikely to help

The strongest results in nutrition consistently come from correcting a genuine shortfall. If your intake is already adequate, the expected benefit of adding more is close to nothing, and the honest version of that sentence is not one the category tends to print. Anyone taking prescription medication should check for interactions before adding anything, and that is not a legal disclaimer so much as a practical one: several common ingredients here genuinely do interact.