Hello, Helen.
Thank you for contacting Holy Hydrogen.
We wish we could give you some answers, but unfortunately, we are not a physicians and cannot provide any medical advice. Please give us a call or email us and we will answer any questions you may have and hopefully, we can provide information that may be helpful for you to make the right decision.
Also, we may have some discounted units or refurbished items, so please check with us directly.
Thank you and looking forward to connecting with you soon!