Two of Quiet Tone's 18 blend ingredients are adaptogens: Ashwagandha and Rhodiola Crenulata. They're listed first in the brand's own category breakdown, which suggests they're meant to anchor the formula's "calm" positioning. Here's what the general research on each actually covers.
Ashwagandha
One of the most-researched adaptogens available, Ashwagandha has a real body of clinical research behind it for stress and cortisol modulation, summarized by NCCIH. Most of that research uses standardized extracts at specific doses — information Quiet Tone's label doesn't provide for its own blend.
Rhodiola Crenulata
A less common Rhodiola species (most commercial Rhodiola research uses Rhodiola rosea), Rhodiola crenulata has a smaller but overlapping research base in general fatigue and stress-response literature.
What Neither Ingredient Is Studied For
Neither Ashwagandha nor Rhodiola has a direct auditory or tinnitus-specific research base. Their inclusion here fits the "calm" side of Quiet Tone's positioning, and there is a legitimate, if indirect, stress-tinnitus connection in audiology literature — but that's a different, more modest claim than a direct hearing-support one.
The Dose Problem
Because Quiet Tone's 415.5mg blend doesn't disclose individual ingredient amounts, there's no way to know whether either adaptogen is present at a dose anywhere near what clinical research actually used.