DNA methylation age based on 9 blood markers.
A weight problems indicator, which you should optimize to be in range of 18.5 to 25.
What's the minimum amount of calories you need per day to maintain your weight?
How much you should take Vitamin D as a supplement, or how much sun light exposure you need?
Advanced.
(by Alexander Fedintsev)
— another attempt to use regression analysis on age evaluation.