Areas › Your body › Food, caffeine and fuel
Put an actual number on it: how many coffees, teas, energy drinks and colas in a normal day. Without that number, your sleep problems, your anxiety and how well a medication is working are all being read against an unknown.
People underestimate this, partly because it feels embarrassing and partly because a large takeaway cup is often two or three servings. Count across three ordinary days rather than guessing, and include the evening ones. Nobody needs telling off about the total. It simply changes what everything else means.
Qur’an and Sunnah
Watch their fruits as they grow and ripen (Quran 6:99). The attention asked for is the unhurried kind, and counting honestly is a small version of it.
وَهُوَ ٱلَّذِيٓ أَنزَلَ مِنَ ٱلسَّمَآءِ مَآءࣰ فَأَخۡرَجۡنَا بِهِۦ نَبَاتَ كُلِّ شَيۡءࣲ فَأَخۡرَجۡنَا مِنۡهُ خَضِرࣰ ا نُّخۡرِجُ مِنۡهُ حَبࣰّ ا مُّتَرَاكِبࣰ ا وَمِنَ ٱلنَّخۡلِ مِن طَلۡعِهَا قِنۡوَانࣱ دَانِيَةࣱ وَجَنَّٰتࣲ مِّنۡ أَعۡنَابࣲ وَٱلزَّيۡتُونَ وَٱلرُّمَّانَ مُشۡتَبِهࣰ ا وَغَيۡرَ مُتَشَٰبِهٍۗ ٱنظُرُوٓاْ إِلَىٰ ثَمَرِهِۦٓ إِذَآ أَثۡمَرَ وَيَنۡعِهِۦٓۚ إِنَّ فِي ذَٰلِكُمۡ لَأٓيَٰتࣲ لِّقَوۡمࣲ يُؤۡمِنُونَ
It is He who sends down water from the sky. With it We produce the shoots of each plant, then bring greenery from it, and from that We bring out grains, one riding on the other in close-packed rows. From the date palm come clusters of low-hanging dates, and there are gardens of vines, olives, and pomegranates, alike yet different. Watch their fruits as they grow and ripen! In all this there are signs for those who would believe
Qur’an 6:99read it in the library
Translation: M.A.S. Abdel Haleem, The Qur'an, Oxford University Press, 2004.
What the research says
The reason to ask is clearest where mood is fragile. A review of caffeine in bipolar disorder found that both intake and abrupt withdrawal can affect mood and sleep. The studies were few and mostly observational, so this is a reason to ask the question and watch what happens rather than a precise rule about how much is safe.
Frigerio S, Strawbridge R, Young AH. (2021). The impact of caffeine consumption on clinical symptoms in patients with bipolar disorder: A systematic review.. Bipolar disorders doi
Strength of evidence: one line of research. A single study, or a theoretical account.
Why it works
Caffeine moves sleep, anxiety and alertness all at once, so judging any of them without the number is guesswork.
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
Water, sleep, food and digestion are not the boring preamble to the real work. When those are running badly, everything else you try has less to work with.
When something has gone wrong across several systems, expecting one treatment to fix it is usually the mistake. Movement, processing what happened, changes to food and work on calming the body tend to add up in a way that none of them manages alone.
A real food allergy shows itself on the body: a rash, a swollen or inflamed throat, something you can see. Behaviour on its own does not identify one, although behaviour often improves once a genuine allergy is dealt with.