Ingredient names are only the starting point. To evaluate NeuroQuiet, we looked first at the supplied packaging rather than inferring a dose from promotional ingredients.
Serving size and the two blends
One serving is six sprays, with 30 servings per 30 mL bottle. The label's two blends group ingredients together. It does not break out the exact amount of Alpha-GPC, GABA or Mucuna individually.
| Label entry | Amount per 6-spray serving | Contents |
|---|---|---|
| Growth Factor Complex | 2,000 ng (as printed) | Alpha-GPC, GABA, L-Dopa Bean, Moomiyo |
| HGA Blend | 1,000 ng (as printed) | Ornithine Alpha Ketoglutarate, L-Glutamine, L-Arginine, L-Lysine, L-Valine, L-Isoleucine, L-Tyrosine, Glycine |
| Serving information | 6 sprays | 30 servings per container; 1 fl oz (30 mL) |
The label artwork appears to use “ng” (nanograms) for both blends. Those printed units warrant confirmation with the manufacturer; this site does not silently convert them to milligrams. Individual ingredient quantities are not disclosed.
Six highlighted ingredients, examined individually
Alpha-GPC
On the label: Alpha-glyceryl-phosphorylcholine. Choline-containing ingredient involved in normal cell signaling. Important qualification: Research on Alpha-GPC in other settings does not establish that NeuroQuiet improves hearing.
GABA
On the label: Gamma-aminobutyric acid. A neurotransmitter associated with inhibitory signaling in the nervous system. Important qualification: Whether oral GABA has meaningful effects at the unspecified quantity in this spray is uncertain.
Mucuna pruriens
On the label: L-Dopa Bean (whole plant). A botanical source that can contain the biologically active compound L-DOPA. Important qualification: The label does not disclose its individual amount or L-DOPA standardization; interactions merit care.
Moomiyo
On the label: Moomiyo (whole plant), commonly associated with shilajit. A mineral-rich traditional substance; composition and purity depend on sourcing and processing. Important qualification: Product-specific purity and heavy-metal testing were not supplied for independent verification.
L-Arginine
On the label: An amino acid in the HGA Blend. Used by the body in nitric-oxide pathways. Important qualification: Its presence does not by itself prove auditory or circulation benefits from the finished spray.
L-Tyrosine
On the label: An amino acid in the HGA Blend. A precursor used to produce certain neurotransmitters. Important qualification: Studies of this amino acid in other contexts cannot be transferred directly to NeuroQuiet.
Other ingredients and formulation questions
The label also lists purified water, lecithin, phospholipids, sodium citrate, citric acid, potassium sorbate, maltodextrin, methylparaben, propylparaben, and natural and artificial flavors. These serve various formulation and preservation roles; sensitivity to an ingredient is personal.
Two buyer questions remain: are the printed blend units correct, and are there independent purity, identity, or microbiological test reports? We have not received such reports. Neither absence of a report nor inclusion on a label proves the product is unsafe; it means verification is incomplete.
Sources and verification
We distinguish the supplied NeuroQuiet packaging and seller descriptions from independent research. Sources relevant to this page include the NIH Office of Dietary Supplements , NIDCD tinnitus overview , and published research on Mucuna supplement labeling . See our full source notes.
Reviewed: October 11, 2026. Our findings reflect available sources at that time. This site is independent and may earn affiliate commissions.
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