Research library
Ageing insights
Peer-reviewed ageing research, translated into plain English.
AgeingFree
What are the side effects of NAD+ IV therapy? The evidence is oral
NAD+ IV therapy side effects have not been catalogued in a trial. Those on record, muscle pain, tiredness and headaches, come from 489 people on NADH pills.
2024Aug 2026
AgeingFree
What does a DEXA scan show, and is it worth the money?
What a DEXA scan shows - bone density, body fat, lean mass, visceral fat - and which of those four numbers the evidence says is worth paying for.
2002Aug 2026
AgeingFree
Does NAD+ IV therapy work? The evidence is one heart failure trial
Clinics sell NAD+ IV therapy for energy and ageing. The one randomised trial of the infusion gave it to 180 people with heart failure, for seven days.
2026Aug 2026
AgeingFree
Are biological age tests accurate? The number depends on the clock
Biological age tests get your real age right. Whether the gap they sell you survives a second test depends on which clock the laboratory ran.
2021Aug 2026