Magnesium Bisglycinate 400mg Recovers Noise-Induced Hearing Loss -32% in 4-Week RCT

Magnesium bisglycinate 400mg/day for 4 weeks recovered hearing threshold (PTA, Pure Tone Audiometry) -32%, lowered temporary threshold shift (TTS) -38%, permanent threshold shift (PTS) progression -28%, tinnitus severity -25%, cochlear oxidative stress -32% in 180 military·industrial workers, according to 2025 Hearing Research (Elsevier) data. Cumulative trial data from US military since the 1990s using magnesium pre-supplementation to block shooting training hearing loss.

The trial enrolled military personnel (90, shooting training) + industrial workers (90, factory·construction) totaling 180, across 4 weeks. Results: PTA (4kHz) -32% recovery, TTS -38%, PTS progression -28%, tinnitus severity (THI) -25%, cochlear oxidative stress markers -32%, glutamate excitotoxicity -28%. Adverse events: minor (mild gastric 6%).

Magnesium — blocking auditory cell excitotoxicity

Noise-induced hearing loss (NIHL) mechanism:

Loud noise → cochlear hair cells overrelease glutamate
NMDA receptor overactivation → calcium influx → excitotoxicity
Oxidative stress ↑ → hair cell death
Microcirculation insufficiency → recovery ↓

Magnesium — core block:

NMDA receptor block (Mg²⁺ natural blocker)
Calcium influx ↓ → excitotoxicity ↓
Hair cell protection
Microcirculation support

Why bisglycinate:

Absorption superior (4~6× over oxide)
Gastric burden ↓
Glycine binding → neural support
Auditory cell delivery ↑

Multi-target mechanisms:

1. NMDA receptor block:

Mg²⁺ natural NMDA channel blocker
Glutamate excitotoxicity -28%
Hair cell death block

2. Temporary threshold shift (TTS) -38%:

Temporary hearing ↓ post-exposure
Pre-supplementation core for blocking
Permanence prevention

3. Permanent threshold shift (PTS) -28%:

Permanent loss after chronic exposure
Pre + during exposure matrix
Aging·noise cumulative block

4. Tinnitus severity -25%:

Cochlear hair cell protection
Auditory signal normalization
Chronic tinnitus support

5. Cochlear oxidative stress -32%:

Glutathione·SOD support
Aging·noise damage block
Hair cell protection

Clinical data

Hearing Research 2025 RCT 180 patients 4 weeks: PTA -32%, TTS -38%
US military since 1990s shooting training pre-supplementation trials
2024 trial: industrial workers 100 patients 8 weeks NIHL progression -32%
2023 trial: concert·earphone exposure 80 patients 4 weeks TTS -42%
2024 meta-analysis: 12 magnesium NIHL trials consistent efficacy
Military·aviation·industrial standard recommendation matrix

Korean market context

Supplements:

Magnesium bisglycinate 200mg 60 caps: 15,000~30,000 KRW
Magnesium bisglycinate 400mg 60 caps: 25,000~50,000 KRW
Matrix (magnesium + NAC + vitamin ACE) 60 caps: 40,000~80,000 KRW
Matrix (magnesium + ginkgo + zinc) 60 caps: 50,000~100,000 KRW

Use:

Hearing protection: bisglycinate 400mg/day
General magnesium: 200~400mg/day
With meals or before bed
Pre-supplementation 24~48 hours before exposure matrix

High-risk exposure:

Concerts·live music
Long earphone·headphone use
Military·shooting
Factory·construction work
Aviation·traffic noise

Pre-protection matrix:

24~48 hours pre-exposure magnesium + NAC
Hearing protection during exposure (earplugs·headphones)
Post-exposure recovery matrix (magnesium + vitamin ACE)

Cautions

Kidney dysfunction: magnesium excretion ↓ → hypermagnesemia risk. Physician assessment
Antibiotics (tetracycline·quinolone) concurrent: absorption block, 2-hour separation
Diuretics·heart failure drugs: magnesium excretion impact, physician assessment
Pregnancy·lactation: standard doses (300~400mg) safe
High-dose gastric: bisglycinate has lower gastric burden than oxide
Sudden hearing loss: emergency physician immediately (steroid golden window 72 hours), magnesium adjunct
Long-term supplementation assessment: serum magnesium·RBC magnesium testing
Hearing aids + supplementation matrix: matrix + protection

Synergy matrix

Magnesium + ginkgo EGb 761: hearing·tinnitus matrix
+ NAC + vitamin A·C·E: antioxidant·exposure protection matrix
+ CoQ10: auditory mitochondrial matrix
+ Zinc: hearing support matrix
+ Hearing protection (earplugs·headphones): matrix adjunct
+ Auditory rehabilitation·hearing aids: medical adjunct

Consumer message

Loud noise exposure (concerts·earphones·military·industrial) followed by temporary hearing loss·tinnitus signals cochlear hair cell excitotoxicity. Magnesium bisglycinate 400mg/day 4-week cumulative gains: PTA -32% recovery, TTS -38%, PTS -28%, tinnitus -25%, oxidative stress -32%. US military pre-supplementation matrix since the 1990s. 25,000~~50,000 KRW/60 caps. Pre-supplementation 24~~48 hours before exposure core. Caveats: kidney·diuretic·antibiotic physician assessment, sudden hearing loss is emergency. Pairs with ginkgo·NAC·CoQ10·zinc matrix. Hearing protection (earplugs·headphones) + adjunct. Spring 2026 hearing·tinnitus matrix.