Awesome to hear, sounds like you get that that could be an issue for users with feelings of struggling to control their health or wanting to optimize it and feeling powerless with regards to aging and mortality.
I'll just say, that even IF you can provide actionable advice to improve things, I still wouldn't want a number or quantifiable thing regarding aging rate. Something like sleep quality or weight change is more indirect and I feel fine knowing the stats. But with actual aging, not even sure I'd want the boolean 'you are experiencing accelerated aging' vs 'you are no longer experiencing accelerated aging' or 'you aren't experiencing accelerated aging'.
Like, look at something like Apple Health that prompts the user to try to get in their daily steps. Or an app reminding an elderly person to stand up every hour. Or to look away from their screen.
Those reminders could secretly be informed by the patient's health markers, but the patient need not think about that or their raw score.
I think the value I'd find in a service like Iollo is getting targeted advice/actions dependent on my own metabolically problematic markers - maybe Iollo's advice changes whether I have sleep issues or hormone problems or eating too much or am smoking cigarettes - and to have those actions/advice change over time dynamically as new input / measurements are received by your systems, as opposed to seeing a line graph showing me just how much I fucked up my body in April when I was grieving a loss of a parent with sleepness nights and hitting the whiskey a bit too hard, just yielding more anxiety and self-recrimination.
On the other hand - I wouldn't mind seeing congratulations or seeing Iollo prove that positive steps I took are resulting in improvements. So maybe Iollo telling me that I did a stellar job in improving measures of cardiovascular health over the last 30-90 trailing days, allowing me to feel like I accomplished something by improving habits.