How to judge a supplement's evidence when your child is neurodivergent
If you are the parent of a neurodivergent child, you have almost certainly been sold something that did not work. The honest way to judge a supplement before you buy it is to ask five questions about its evidence, and you can answer all five from the label and a search that takes about ten minutes.
None of this tells you whether something will suit your child. It tells you whether anyone has genuinely tested the thing you are being asked to pay for, which is a lower bar than most products clear.
Why this falls harder on neurodivergent families
Households like yours are marketed to relentlessly. The pitch usually arrives with a story rather than a study, and it tends to arrive when you are tired and have already tried several things. The result is that a lot of money moves toward products that have never been tested at all, and every disappointment makes the next honest product harder to believe.
The five questions below are not about being cynical. They are about spending your attention on the small number of ingredients that have actually been studied.
1. Was the ingredient tested on its own?
This is the question that eliminates the most products, and almost nobody asks it.
Plenty of trials test a blend. If a blend of six things beats placebo, you have learned something about the blend and nothing about any one ingredient in it. A 2017 trial of 123 adults is a clean example: it tested curcumin at two amounts, and curcumin combined with saffron, against placebo. The active treatments together beat placebo. Saffron on its own was never tested, so that trial cannot tell you what saffron does (Lopresti et al., Journal of Affective Disorders, 2017, PMID 27723543).
When a label lists a "proprietary blend" and cites research, check whether the research tested the blend or one component. Very often it tested one component, at an amount the blend does not contain.
2. Is the extract standardised, and standardised to what?
"Saffron" on a label means about as much as "grape" on a wine bottle. The active compounds in a plant vary enormously with where it grew, when it was picked and how it was processed. A standardised extract is one where the manufacturer measures the active compounds in every batch and guarantees a minimum.
So the question is not whether a label says saffron. It is whether it says what the saffron is standardised to, and at what level. A real answer looks like a named marker compound and a percentage, verified by laboratory assay on each production batch. A vague answer looks like "high potency" or "premium".
This matters more than it sounds. If a trial used a standardised extract and the product on the shelf is unstandardised powder, the trial does not describe what is in the bottle, no matter how prominently it is cited.
3. Was it placebo-controlled, and how many times?
A study where everyone knew what they were taking and everyone got better tells you very little, because children and their parents both improve when something new and hopeful is introduced. That effect is real and it is large. The only way around it is a placebo group.
One placebo-controlled trial is a signal. Several, by different research groups, in different countries, is a body of evidence. The number is worth knowing and it is usually findable: some ingredients have one small study behind a large marketing budget, and a few have a genuine record.
For comparison, the standardised saffron extract with the deepest record has eleven published placebo-controlled trials behind it, enrolling more than a thousand people in total. That is unusual. Most ingredients in the children's supplement aisle have nothing of the kind.
4. Was it tested in anyone like your child?
This is where most evidence quietly stops applying, and it is the question the marketing least wants you to ask.
The overwhelming majority of supplement research is done in adults. An adult trial is not evidence about a nine-year-old: the amounts differ, the outcome measures differ, and children are not small adults metabolically. A product can cite a dozen genuine studies and still have no research in children at all.
So look for the age range. Where research in young people exists, it is worth reading closely. In an eight-week placebo-controlled trial of teenagers aged 12 to 16 with mild to moderate anxious or low mood, those taking a standardised saffron extract twice a day reported a 33% fall in those symptoms, against 17% on placebo (Lopresti et al., Journal of Affective Disorders, 2018, PMID 29510352). That is a real result in adolescents, and it is also honestly limited: it was self-reported, the parent-rated results were less consistent, and it says nothing about children under 12, because none were enrolled.
A company willing to tell you the age range of its evidence is telling you something about how it handles the rest.
5. Does the label give the amount, and does it match?
The last question is the simplest and it catches a great deal.
Find the amount per serve on the label. Then find the amount used in the trial the product cites. If the label does not give an amount, or the amount is a fraction of the studied one, the citation is decoration. This is extremely common: a product cites a study that used a gram of something and contains fifty milligrams of it.
For probiotics there is an extra layer. Effects are specific to the strain, not the species, and a strain is written as a species followed by a code. Results from one strain do not transfer to another with the same species name, so pooled findings about "probiotics" cannot be claimed by any particular product. A label that names the full strain and the count at the end of shelf life, rather than at manufacture, is being straight with you.
What the answers cannot tell you
All five questions are about the quality of evidence, not about your child. Even a well-studied ingredient with a genuine trial in the right age group is describing an average across a group of people. Some in that group improved a lot, some not at all, and the trial cannot say which your child would be.
What the questions do is narrow the field to things that have been properly tested, so that when something does not suit your child you have learned something, rather than adding another unknown to a long list.
If you take one thing from this: ask what the ingredient is standardised to, and what age the people in the study were. Those two questions alone will tell you more than the front of any box.