Morning and evening: why the routine is the part that works
The most common reason a supplement stops working is that it stops being taken. Not a formulation problem, not an absorption problem. A Tuesday problem.
Here is what is known about making a daily thing stick in a house with children in it.
Anchor it to something that already happens
The most reliable finding in the habit literature is that new behaviours attach best to existing ones. You do not build a new slot in the day. You bolt onto a slot that is already there and already automatic.
In a household, the two most stable anchors are the start and the end of the day. Breakfast happens. Bedtime happens. They happen at roughly the same time, in roughly the same place, with roughly the same people, seven days a week, and they survive holidays and weekends better than anything in between.
The after-school hours, by contrast, are the least stable part of a family's day and the worst place to put anything you want to happen every single time.
Why two moments beat one
A once-a-day routine has a single point of failure. Miss the morning and the day is gone.
A twice-a-day routine has two independent chances to happen, and more usefully, each one reminds you of the other. Missing the evening is noticed, because the morning happened.
There is a second reason, and it is about what the day asks of a child. The demands of a school morning and the demands of an evening are not the same demands, and a routine shaped to both is a routine that fits the day rather than fighting it.
Sameness is not boring, it is what makes it possible
This is the part that families with a sensory-sensitive child already know and everyone else underestimates.
If a thing tastes different today than it did yesterday, it becomes a decision. Decisions invite negotiation, and negotiation at 7:40 in the morning is how a routine dies.
A daily item that is identical every time, same taste, same texture, same packaging, same moment, asks nothing. It is not a choice, it is just part of what happens. Predictability is the feature.
The same logic applies to where it lives. One place, visible, at the point of use. A supplement in a cupboard behind other things is a supplement that gets remembered on the good days only.
Give it the time the research gave it
Trials in this area run four to twelve weeks and report at set points. Eight weeks is roughly where a well-run study expects to see a difference if there is one.
The practical version: judging something at ten days is judging before the instrument would have registered anything. Give a new routine the length of time the studies used.
Two things help while you wait. Change one thing at a time, because if a supplement, a new bedtime and a school holiday all start in the same week you will not know what you are watching. And write down at the start what a hard morning or a hard bedtime actually looks like, because memory reconstructs, and a note made before you begin is worth more than a recollection made afterwards.
Four rules that carry most of the benefit
Anchor to breakfast and to the hour before bed. Not to a time on a clock, to an event that already happens.
Same thing, same way, every day. Remove every decision you can.
Keep it where it is used. Visible beats organised.
Let the child do the doing. Handing over the opening and the taking turns compliance into ownership, and ownership survives the days you forget to ask.
What to take from it
The start and the end of the day are the two most reliable anchors in a family's week. Two moments beat one, because each reminds you of the other. Sameness is what makes a daily thing effortless rather than negotiable.
And whatever you are trying, give it the eight to twelve weeks the research gives it before you decide.