@edsutton Yes, indeed, Memory Air is an expensive solution, so it doesn't make sense if you are just trying to improve your sense of smell, but as far as I know, is the only smell-based memory treatment that has been tested in a clinical trial, which also means it was very costly to bring to market in the first place. Think of it as a new big pharma drug, most of which are hideously expensive until generic options become available, which is what it takes to motivate firms to go through the hideously expensive process to design, make, test, trial, fail over and over again, and and finally get something to market as a commercial product.

Latest update: You can trial the Memory Air device for 60 days and return it for a full refund at that point if you are not seeing benefits. After a chat with customer service about my concerns, I'm going to give it a go. I'm also marking my calendar, so I have a reminder to consider returning it before the window closes.

So one possibility would be to trial the essential oils, and if you were not entirely happy with their impact on your memory, trial the device.

They actually offer an (optional) before-and-after online memory test you can use if you wish to see if there is an impact. Maybe you can just do the test without buying the product, use the essential oils for several months, and do the test again? They say:
- Visit test.memoryair.com to start.
- You’ll hear a list of 15 words, repeated over 5 rounds.
- After the 5th round, you’ll be asked to recall as many words as you can.
- We’ll give you a personal score to track your starting point.
Memory Air therapy has been shown in clinical trials to dramatically improve memory—by as much as 226% in healthy seniors and 300% in patients with dementia. This optional test can give you a clearer view of your own memory growth over time.