Placeholder. One supplement ingredient (Tru Niagen's patented NAD+ precursor) has published, specifically quantified clinical claims — a 50% to 150% increase in NAD+ levels depending on dose — that are dramatically more precise than the vague 'supports energy' language used across almost the entire rest of the category.
What we've found so far: Tru Niagen (ChromaDex) cites peer-reviewed data showing 300mg raises NAD+ by over 50% and 1,000mg (Pro) by up to 150%, backed by a named Nobel Prize-winning biochemist on its scientific advisory board.
Open research: Pull the actual underlying published trials directly rather than relying on brand summaries; find out why more supplement brands don't publish dose-specific quantified claims like this.