MAGNESIUM WAS ONLY EVER DOING HALF THE JOB

I want to start by defending the thing I'm about to criticise, because I don't think magnesium is a scam and I took it every night for about two years.

It did things. That's the part I got wrong for a long time. My calves used to seize up in the middle of the night — that thing where you wake up already in pain, standing on a cold floor at 2am swearing at your own leg — and at some point that stopped. My shoulders used to sit somewhere up near my ears by nine in the evening and I'd have to consciously drop them. That mostly stopped too. There was an eyelid thing all through one March that went quiet and never came back.

None of that registered as success, because none of it was what I bought it for. I'd get into bed physically fine, genuinely relaxed in the body, and lie there with my brain going through the day like a spreadsheet. Not anxious exactly. Just on. So I decided it wasn't working, and I kept taking it anyway, which I recognise is not a rational position. It took me two years to understand that I hadn't bought something that failed. I'd bought something for the wrong half.

Here's the distinction it took me embarrassingly long to see. A tight body and a busy head are two different problems. They usually turn up together, which is why everyone treats them as one thing. They are not one thing. One of them is the calf seizing at 2am. The other is lying there with an itemised list of everything that has to happen on Thursday.

Settling the body is one job. Turning down the volume on the thinking is a different job, and it needs different inputs. What I eventually found was that the things which work on the second half are well known — ashwagandha and L-theanine, mainly — they just aren't in a standard magnesium bottle, because a standard magnesium bottle was never trying to do that. L-theanine is the thing in green tea that takes the edge off without making you drowsy. Ashwagandha is what people take when the problem is being permanently braced rather than physically sore.

That's the whole answer, and it's much less exciting than I expected. There was no breakthrough and nothing had gone wrong with me. I'd been taking one half of a two-part solution for two years and drawing conclusions about my own biology from it. The category collapsed both halves into the word calm somewhere along the way, and I'd never thought to ask which half I was actually buying.

The thing that made it stick wasn't the product. It was giving nine o'clock a job.

My evenings used to run as one undifferentiated stretch from dinner until whenever I gave up, with a phone in it the entire way. Nothing marked the end of the day. Nothing told my body it could stop holding whatever it had been holding since the commute. It just ran continuously until I fell asleep, and the next morning started slightly behind because the previous night never properly closed.

Now it's one gummy before nine, and then the phone goes on the kitchen counter. That sequence — taking it, then deliberately putting the phone down — is what gives the evening an ending. It's not dramatic. It's just a line the day doesn't cross, and the more consistently the line exists the faster everything settles behind it. I'd say give it a fortnight before deciding anything. The first few nights didn't feel like much to me either, and that's normal.