Interesting question - yes, I think there are things that you may want to watch more closely if you’re implementing rapaycin at a younger age. It seems likely to be more difficult to track positive impacts because your body is functioning much better than people who are, say 50 years +.
I don’t think anyone has done this before - but given your science focus, PHD pursuit, etc. - you’d be in a great position to do this, if you can afford it (the rub, of course, is that testing costs $).
For example - it would be really interesting to track your visceral fat levels via DEXA scan. Unlike in most people - over the next decade you should not see a significant increase increase in visceral fat if you are taking rapamycin.
Similarly, muscle and grip strength should not decrease, etc.
Perhaps review this document (The case for taking rapamycin when younger) and related research and try to help us develop a tracking methodology for younger people using rapamycin that other people can refer to. Given your science-background you would be a great person to draft something like this.
Are you at a university that has a exercise physiology lab? That would be a great place to start - get all your baseline data - VO2Max, visceral fat, etc…
And then other physiology markers - hearing, eyesight, sperm motility (perhaps they will tell you if you donate), etc.
Another idea is to volunteer for some medical clinical trials that measure biomarkers that might be of interest - you could be in the control group. For example there is a lot of research that suggests that Rapamycin use improves heart function as measured by ejection fraction. There are clinical trials that measure this. I’ve actually contacted some researchers from clinical trials listed on clinical trials.gov to participate in these types of research efforts, just so I can get these measurements done.
Perhaps other people have some ideas they can contribute… biomarkers to track when starting rapamycin when you are younger…