Count days taken against days elapsed. Most people discover at this point that they missed more than they remembered — a weekend away, a couple of rushed mornings, a bottle left at the office.
Below 85% and any conclusion you draw at week eight will be about your consistency rather than the formula. Fix the anchor now: same meal, bottle visible, phone reminder if needed.
At four weeks the honest answer is usually “within noise”. Our own 3pm energy marker had moved from a baseline 4.6 to about 5.0, which is not distinguishable from a good week.
The ingredient literature agrees. Ashwagandha and Bacopa trials measure at eight and twelve weeks precisely because four is too early to see the signal above the variation.
If anything was going to cause a problem it usually has by now. No adverse effects at four weeks is a genuinely useful data point and worth recording.
If you have had persistent digestive symptoms across four weeks, that is not a settling-in period any more — stop and speak to a doctor.
Week four is the last sensible point to adjust anything before the evaluation window, and there are exactly two adjustments worth making.
Fix the anchor if adherence slipped. If you missed more than a handful of days, the cause is almost always the anchor rather than motivation — the bottle is in a cupboard, or the anchor behaviour does not happen at weekends. Move the bottle into the physical path of something that happens every single day.
Change the timing if tolerance is poor. If you have had recurring digestive discomfort, moving from empty stomach to with-food resolves it in most cases. If you have found the formula makes you drowsy, an evening dose is a defensible alternative.
What is not worth adjusting: the dose, the product, or the marker set. Changing any of those resets the clock on your trial and you will reach week eight with nothing interpretable.
Make the two adjustments if needed, then hold everything steady for four more weeks.
Week four is an adherence checkpoint, not a results checkpoint. Expect data within noise, confirm tolerance, remove confounders and hold the routine steady to week eight.
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