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Skin prick and IgE blood tests find real allergies. The IgG food sensitivity panels sold direct to families have not been shown to measure sensitivity at all, and they tend to come back with a long list of foods to avoid.
IgG antibodies mostly show that you have eaten something, not that it harms you, which is why the results look alarming and change so little when acted on. The damage is real though: money spent, and a child's diet narrowed for no reason. If you want testing, ask your GP which test actually answers the question you have.
Qur’an and Sunnah
Neither wasteful nor niggardly when they spend, but keep to a just balance (Quran 25:67). Money going on a test that cannot answer the question is the kind of waste the verse has in view.
وَٱلَّذِينَ إِذَآ أَنفَقُواْ لَمۡ يُسۡرِفُواْ وَلَمۡ يَقۡتُرُواْ وَكَانَ بَيۡنَ ذَٰلِكَ قَوَامࣰ ا
They are those who are neither wasteful nor niggardly when they spend, but keep to a just balance
Qur’an 25:67read it in the library
Translation: M.A.S. Abdel Haleem, The Qur'an, Oxford University Press, 2004.
What the research says
Popular is not the same as proven, and the gut supplement literature shows the pattern. Across 34 controlled trials, prebiotics had no effect on depression or anxiety and probiotics showed only small effects, several of those coming from low quality trials. Products can be sold widely and confidently on thin evidence, so it is fair to ask what has actually been tested before spending.
Liu RT, Walsh RFL, Sheehan AE. (2019). Prebiotics and probiotics for depression and anxiety: A systematic review and meta-analysis of controlled clinical trials.. Neuroscience and biobehavioral reviews doi
Strength of evidence: one line of research. A single study, or a theoretical account.
Why it works
A test that measures exposure rather than harm will name the foods you eat most often, whether or not they trouble you.
This one is still a draft. It is waiting on a scholar and a clinician to read it before it is published.
Near this one
Saying a difficulty is in the past is not the same as saying it was never real. Sometimes a picture changes because something that was making it worse got taken away, and the honest words for that are neither cured nor imagining it.
Herbal products are rarely covered by insurance and they add up quickly. That cost belongs in the decision, particularly when you cannot be sure the capsule holds what it says.
Stress unsettles the gut and an unsettled gut drags on mood, so the two keep each other going. The good news buried in that is you can step in from either end.