Practices

If you are testing whether a food affects you or your child, the test has to be complete. Among children with suspected sensitivity to artificial colouring, most reacted to as little as 100 mg, so a bit left in is enough to blur the answer.

What usually happens is that a family removes the obvious sources, misses the ones hidden in medicines, sauces and cereals, sees no change, and…

If you are going to test whether a food matters, work out in advance where the plan will leak. School lunch swaps, a grandparent's biscuit tin, your own memory on a hard week: all of it decides whether the answer means anything.

Change one thing at a time and keep everything else steady, otherwise you cannot tell which change did what. Then be honest about who is running the…

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.

This is not an argument for doing everything at once until you are exhausted. It is an argument against giving up on the whole idea when the first…