Monoatomic Gold is hugely overpriced, imo and it makes impossible claims about being made of single atom particles. Not saying it does not work, just saying it costs a ton and makes wrong claims.
Myself and my partner Luella May use CureZone sponsor Utopia Silver's Advanced Colloidal Gold and we can tell a noticeable difference when we take it in our mental sharpness, memory and mood. Another top quality product is the colloidal gold made by Purest Colloids.