I would strongly suggest you to add a very visible and clearly worded disclaimer that the information in this post does not represent a medical advice and is for informational and/or educational purposes only. It is also typical to include a note that people should see their doctors, if they do not feel well for more than a couple of days (and, sometimes, immediately, depending on severity of their symptoms). Also, some of the substances that you have mentioned are known to have contraindications for some people, so it is quite dangerous to advise people to try these things without first consulting with medical professional. I say all that, despite the fact that I have a significant faith in natural remedies, in general, and in nootropics, in particular (I have used Nootropil / Piracetam intermittently since 1980s with success). However, different people (even relatively healthy ones) have different tolerances to various substances, so they should really know what they are doing and, even then be very careful, even with natural supplements.