is it unreasonable to ask for a break when you live together?

I was going to say I've been looking at this thing for my daughter (who suffers from depression) but I haven't quite decided whether or not to get her one yet.
I wondered if it might be of any interest to you:
https://www.flowneuroscience.com/

I never tried that and never even heard of it, but only one thing bothers me about that "scientific" (promotional) website.
57% depression free... It is a pretty strong argument to make... how do they define depression, do they treat is as a symptom or as a diagnosis?
I suffered from depression as a symptom of ADHD (discovered it only much later in life). I can say that I am depression free for 20 years, not because I didn't have episodes of depression, but because they were not called depression anymore.
I doubt that a person with bi-polar disorder can go depression free even with treatment.
This statement alone makes me doubt the treatment. Is it hiding the symptom/masking it or really preventing it?!
What are the side effects? Chemical balance/imbalance cause hormonal issues, if the treatment changes the balance of chemicals in the brain it may be as well impact the hormonal balance. How is it works on other things... even the reproductive system....
Well I'm a strange person. I support alternative medicine and some not scientifically proven things, but very doubtful about scientific statements that look more like a promotion.