The short answer
It is worth considering if you are an adult over forty whose recall has slowed but is holding steady, you want a simple once-daily routine, and you are prepared to give it at least six weeks.
It is not worth your money if you want something you will feel this week, if your memory is getting worse rather than holding steady, or if you expect a capsule to out-perform fixing your sleep.
What you are actually buying
Six ingredients, every amount printed on the label. Four of the six have randomised human trials attached. Two — bamboo silica and D-Glucosamine — have no cognitive research whatsoever, and we would rather say so here than let the ingredient count imply otherwise.
One capsule a day with food. Thirty capsules a bottle, so one bottle is one month. Sixty days from delivery to send it back, opened bottles included.
What the four with evidence actually showed
- Ginkgo: better recall of agreed appointments after six weeks, in 188 healthy adults aged 45 to 56. No effect on recognition memory in the same study, and no reduction in dementia rates in two much larger trials.
- Curcumin: ahead of placebo on memory and attention after eighteen months, in forty adults aged 51 to 84.
- Lutein: an attention benefit after twelve months, in 51 analysable participants.
- Theanine with caffeine: improved attention-switching within a couple of hours.
All four are real. None of them is large. In every one, a share of participants saw no change at all.
How to take it
One capsule daily, with a meal. Morning is better than evening for two reasons: the fat-soluble ingredients absorb better with food, and the small amount of natural caffeine is better taken early if you sleep lightly.
Do not double up after a missed day. There is no loading phase and no cycling off.
Who should not buy it
- Anyone on a blood thinner or antiplatelet, without asking a pharmacist first. Ginkgo is the reason.
- Anyone with surgery booked in the next fortnight.
- Anyone whose memory is worsening, or affecting driving, money or daily management. That is an appointment.
- Vegetarians and vegans — the capsule shell is bovine gelatin.
- Anyone under eighteen, pregnant or breastfeeding.
- Anyone hoping it treats or prevents Alzheimer's disease or dementia. It does not, and nothing sold as a supplement does.
The commission disclosure, stated plainly
This site earns a commission on purchases made through its links, at no extra cost to you. That is the business model and it is why pages like this one usually read as unbroken enthusiasm.
Our view is that the version with the limitations written in is more useful to you and more defensible for us. You can judge whether we have held to it by reading the bamboo and glucosamine pages, which cost us two ingredients' worth of persuasion each.
What makes it a reversible decision
The sixty-day window, counted from delivery, accepting opened bottles. That is the part that turns an unanswerable question — will it work for me — into one you can simply find out. Put the end date in your calendar on delivery day.