Your body

Own brand products from large retailers were among the worst performers in these tests. A big name on the packet is not a quality check, however much it feels like one.

Own label goods are usually made under contract on thin margins with no independent verification of what comes out the other end. So the reassurance…

People often turn to herbal remedies hoping to avoid side effects. Plants are chemistry too, and some of them interact with prescribed medication in ways that matter.

A plant extract is not one substance, it is a mixture of many, which gives it more places to interact rather than fewer. Origin has nothing to do…

Around seven in ten people who use herbal products never mention it to their doctor. Not out of secrecy, mostly because a tea or a gummy does not feel like it belongs on a list of medications.

The useful move is to answer a wider question than the one you were asked. When someone asks what medication you take, tell them what else you take…

Your gut is not just plumbing. It makes many of the same chemicals your brain runs on and it is in constant conversation with your nervous system, which is part of why a bad stretch of digestion and a low mood so often turn up together.

If your stomach has been unsettled for weeks and your mood has slid over the same weeks, you do not have to work out which one is the real problem.…

When you find yourself reaching for something sweet again, try asking what the reaching is doing for you instead of telling yourself off. Comfort, a small rebellion, a way to stay awake: the answer usually points somewhere useful.

Talk about being good or bad closes the conversation down. Curiosity keeps it open, and it tends to surface the actual job the food is doing, which…

Put a rubber band round your water bottle for each refill you want to get through today, and slide one off each time you finish it. Nothing to remember, nothing to buy, and you can see where you are at a glance.

Tracking anything in your head is hard when your head is already full, and harder still when concentration is one of the things that has taken a hit.…

Where ADHD and disordered eating meet, the pattern is more often bingeing, or bingeing and purging, than strict restriction. Restriction tends to travel with over-control, while bingeing travels with impulse and reward seeking.

This matters because the questions asked at assessment are usually the restriction ones, so a binge pattern can sit unnoticed for years. If you…

Most claims about food and behaviour rest on weak studies. The ones worth taking seriously give each person both the real thing and a dummy at different times, with nobody knowing which is which, so that hope and expectation cannot do the work.

The food colouring trials are the standard example. Around 150 children each received drinks containing a preservative plus one of two dye mixes, or…

The same brand of sweets is often made with plant based colours in one country and artificial ones in another. If a company can make it without the dyes elsewhere, the dyes are not essential to the food.

Nine artificial colours are approved in the US, and the volume approved for use rose roughly fivefold between 1950 and 2012. One of them, Red No. 3,…

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…

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.

One child's attention and mood went back to her usual level once berries came out of her diet, and what made that findable was the rash and the sore…

The studies linking pesticide levels to ADHD are tangled up with income, since families least able to buy organic differ in plenty of other ways too. If organic food is affordable for you, fine. If it is not, you are not failing your child.

In one study of 1,140 children, 94% had detectable pesticide in their urine, and ADHD was about twice as common among those with higher…

Most eating advice quietly assumes a budget. Fresh food is expensive and does not keep, so a household relying on food assistance ends up buying what lasts, and what lasts comes in tins and packets.

If money is the constraint, say it out loud rather than nodding along and then failing quietly at home. The advice can be rebuilt around what is…

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…

Stimulants sharpen focus in almost anyone, so responding well to one does not confirm you have ADHD. The diagnosis comes from your history and how you function, not from a trial of tablets.

This cuts both ways. Someone can be handed a diagnosis on the strength of a good response, and someone else can be doubted because their response was…

Food and movement are powerful, and hardly anyone keeps them up as prescribed. So the question is not what works best on paper. It is what you will still be doing in six weeks.

Roughly a third of people follow a prescription exactly as it is written, and keeping to a diet or an activity plan goes worse than that. Which means…

Pick one small change and leave the rest alone. A full overhaul asks the most of you at the point when you have the least to give, and it usually collapses in the second week.

One change, small enough to be almost boring, kept for a month. Then another. It feels slow while you are in it, and it is the version that tends to…

Working out what you have comes before choosing what to take. The right remedy for the wrong condition is still the wrong remedy, however good the remedy happens to be.

The health food shop route usually starts with a self diagnosis, and that first step is the one worth slowing down. St John's wort will do nothing…

Supplements are regulated as food rather than as medicine. Nobody checks strength or purity before a product goes on sale, and the main rule is that the packet cannot claim to treat a disease.

Most people assume the opposite, that anything on a pharmacy shelf has been through some kind of approval. Regulators here generally act only once a…

When researchers ran DNA testing on 13 herbal products, only 2 contained the plant on the label. Three had none of it at all, and several were padded out with rice, soy or wheat that nobody had declared.

The obvious problem is paying for something you did not get. The quieter problem is the undeclared filler, which matters a great deal if you avoid…