amino acid
Pronunciation: TAWR-een

What it isSulfonic amino acid with osmoregulatory and modulatory roles, present in energy drinks.
Why this oneIt is included in energy drinks on a rationale that has never been demonstrated clinically.
What limits itEvidence for the promoted neurologic and cardiometabolic uses is insufficient.
Available strengths
NO BOXED WARNINGS
Principal riskEvidence for promoted uses is insufficient