Safety, Ingredients, Mechanism of Action, and Manufacture

ACEMg formula

ACEMg, the first evidence-based formulation in the emerging field of auditory micronutrition, contains four nutrients in a patented combination and ratio. Each softgel capsule contains:

  • Provitamin A (beta-carotene) – 7500 mcg RAE
  • Vitamin C (as calcium ascorbate) – 250 mg
  • Vitamin E (as dl-a-tocopheryl acetate) – 133.5 mg
  • Magnesium (as Magnesium oxide) – 157.5 mg

The recommended daily dose is two capsules. See the full Supplement Facts label provided below for detailed nutritional information.

Supplement Facts for Soundbites ACEMg. A serving is two softgel capsules, and each bottle holds 56 capsules, a four-week supply. One serving provides 15,000 mcg RAE provitamin A (as beta-carotene), 500 mg vitamin C (as calcium ascorbate), 267 mg vitamin E (as dl-alpha tocopheryl acetate) and 315 mg magnesium (as magnesium oxide). Select the label to view it enlarged.
Soundbites ACEMg inner ear supplement label. Supplement Facts, serving size two softgel capsules, 28 servings per container. Per serving: provitamin A (as beta-carotene) 15,000 mcg RAE, vitamin C (as calcium ascorbate) 500 mg, vitamin E (as dl-alpha tocopheryl acetate) 267 mg, magnesium (as magnesium oxide) 315 mg. 56 softgel capsules, a four-week supply.

Safety

ACEMg (Soundbites) is a supplement regulated by the FDA. It is not a drug, is inherently safe, and is available without a prescription. If you are a smoker, or if you are pregnant, nursing, taking medications, or have an existing medical condition, please consult your healthcare provider before use. Always use as directed. Sensitive individuals may experience mild gastrointestinal discomfort when taking two capsules simultaneously. If this occurs, we recommend splitting the dosage by taking one capsule in the morning and one in the evening. If symptoms persist, try reducing intake to one capsule per day. For further personal guidance, please contact hello@soundbites.com.

Mechanistic background, composition and manufacture

Extended ACEMg Mechanistic Background

Free Radical Theory of Hearing Loss

The free radical theory of cellular aging, first proposed in 1954 (Harman, 1992), provides the theoretical foundation for understanding the mechanisms of sensorineural hearing loss and the potential protective effects of antioxidant supplementation. Reactive oxygen species (ROS), including superoxide anion (O2•−), hydrogen peroxide (H2O2), hydroxyl radical (•OH), and singlet oxygen (1O2), are produced as byproducts of mitochondrial oxidative phosphorylation and other cellular processes.1

Under normal physiological conditions, endogenous antioxidant system, including superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx), and the glutathione redox system, maintain ROS at levels compatible with cellular function. However, when ROS production exceeds antioxidant capacity, the resulting oxidative stress damages cellular macromolecules, including lipids, proteins, and nucleic acids.2, 3, 4, 5

Cochlear Vulnerability to Oxidative Stress

The cochlea is particularly vulnerable to oxidative damage due to several factors:

  1. High metabolic demand: Outer hair cells (OHCs) and inner hair cells (IHCs) require substantial ATP for mechanoelectrical transduction, generating significant ROS as a metabolic byproduct.
  2. Noise-induced metabolic stress: Acoustic overstimulation dramatically increases cochlear energy demand, amplifying ROS generation beyond normal antioxidant buffering capacity.
  3. Limited regenerative capacity: Unlike other sensory epithelia, mammalian cochlear hair cells do not regenerate, making oxidative damage cumulative.
  4. Vascular dependence: The stria vascularis, which maintains the endocochlear potential essential for hair cell function, is susceptible to ischemia-reperfusion injury and vasospasm.
  5. Delayed ROS production: Research by Yamashita et al. (2004) demonstrated that noise exposure triggers delayed free radical production peaking 7-10 days post-exposure, extending the window for potential intervention.

Pathways to Oxidative Cochlear Damage

Oxidative stress damages cochlear structures through multiple interconnected pathways:

Lipid Peroxidation: ROS attack polyunsaturated fatty acids in cell membranes, initiating chain reactions that generate lipid hydroperoxides. This process compromises membrane integrity, affecting ion channel function and cellular signaling. Ohinata et al. (2003) demonstrated that noise-induced lipid peroxidation in the cochlea correlates with hair cell loss.

Mitochondrial DNA Damage: ROS that penetrate the outer mitochondrial membrane damage mtDNA, leading to expression of abnormal proteins and further mitochondrial dysfunction. This creates a vicious cycle of increasing oxidative stress and declining energy production.

Apoptotic Pathway Activation: Sustained oxidative stress upregulates pro-apoptotic genes and activates caspase cascades. Research by Op de Beeck et al. (2011) documented the programmed cell death pathways involved in both genetic and acquired hearing impairment.

Vascular Dysfunction: Noise-induced vasospasm reduces cochlear blood flow, causing ischemia. Subsequent reperfusion generates additional ROS through xanthine oxidase and NADPH oxidase pathways. Eisenhut (2019) provided evidence supporting inflammation-induced vasospasm as a key mechanism in acquired SNHL.

Mechanisms of ACEMg Component Activity

Each component of the ACEMg formulation contributes distinct and complementary mechanisms for cochlear protection:

Beta-carotene (Provitamin A): Functions as the primary singlet oxygen quencher in the formulation. Singlet oxygen (1O2) is highly reactive and initiates lipid peroxidation; beta-carotene physically quenches singlet oxygen by energy transfer, preventing chain initiation. Schafer et al. (2002) confirmed beta-carotene’s superior singlet oxygen scavenging compared to other lipophilic antioxidants.

Vitamin E (d-alpha tocopherol): The primary chain-breaking antioxidant in lipid membranes. Vitamin E donates hydrogen atoms to lipid peroxyl radicals, terminating the propagation phase of lipid peroxidation. Located within the lipid bilayer, it provides protection at the site of membrane oxidation. Niki (1987) documented vitamin E’s role in protecting membrane lipids from oxidative damage.

Vitamin C (Ascorbic acid): Serves dual functions: (1) direct scavenging of aqueous-phase ROS including superoxide and hydroxyl radicals; and (2) regeneration of oxidized vitamin E (tocopheroxyl radical) back to its active form, maintaining the vitamin E pool. This synergistic interaction between vitamins C and E extends the effective antioxidant capacity of the formulation. Evans and Halliwell (1999) reviewed the criteria for free radical involvement in hearing loss and the rationale for combination antioxidant therapy.

Magnesium: Provides cochlear protection through vasodilatory effects independent of direct antioxidant activity. Magnesium is a natural calcium channel blocker that reduces vasoconstriction and improves cochlear blood flow. By attenuating noise-induced vasospasm, magnesium reduces ischemia-reperfusion injury, a significant source of secondary ROS generation. Le Prell et al. (2007) in the Miller lab demonstrated that the combination of antioxidants plus magnesium provided superior noise protection compared to either intervention alone.

Synergistic Effects of the ACEMg Combination

Laboratory studies demonstrated that the combined ACEMg formulation provides substantially greater protection than individual components or partial combinations. Le Prell et al. (2007) reported that ACEMg increased noise tolerance of cochlear cells by an average of 31 dB compared to control conditions, maintaining normal auditory function when sound pressure levels increased by as much as 10 times. This synergistic effect reduces hearing loss from noise by approximately 75%.

The synergy arises from complementary mechanisms: beta-carotene quenches initiating singlet oxygen species; vitamin E terminates lipid peroxidation chain reactions; vitamin C scavenges aqueous radicals and regenerates oxidized vitamin E; magnesium reduces vascular-mediated ROS generation. This comprehensive approach addresses multiple points in the oxidative damage cascade.6

ACEMg Composition and Manufacture

Formulation Design and Composition of Matter

ACEMg is a high-potency antioxidant and vasodilatory mineral supplement formulated specifically for auditory health support using a suspoemulsion liquid formulation combining solid particles (suspensions) and oil/solvent droplets (emulsions) within a water-based system, resolving the challenge of combining fat-soluble and water-soluble nutrients in a single delivery system. In the ACEMg formulation, hydrophobic lipophilic vitamins A and E are incorporated in microencapsulated form and dissolved in the softgel matrix alongside hydrophilic vitamin C and magnesium. All ACEMg active ingredients are classified as Generally Recognized as Safe (GRAS) by the FDA. This regulatory classification reflects the established safety profile of these nutrients at the doses provided in the formulation, based on extensive historical use and scientific evidence.

Manufacture

ACEMg softgel capsules are manufactured in a U.S. FDA-registered and certified facility following Current Good Manufacturing Practices (cGMP) as required by 21 CFR Part 111 for supplements. The process incorporates quality standards for verifying and documenting raw material purity, and potency; in-process controls; finished product testing; and stability.

References

  1. Jomova K, Raptova R, Alomar SY, et al. Reactive oxygen species, toxicity, oxidative stress, and antioxidants: chronic diseases and aging. Arch Toxicol. 2023 Oct;97(10):2499-2574. doi: 10.1007/s00204-023-03562-9. PMID: 37597078; PMCID: PMC10475008.
  2. Yamasoba T, Nuttall AL, Harris C, Raphael Y, Miller JM. Role of glutathione in protection against noise-induced hearing loss. Brain Res. 1998 Feb 16;784(1-2):82-90. doi:10.1016/s0006-8993(97)01156-6. PMID: 9518561.
  3. Budinger GR, Tso M, McClintock DS, Dean DA, Sznajder JI, Chandel NS. Hyperoxia-induced Apoptosis Does Not Require Mitochondrial Reactive Oxygen Species and is Regulated by Bcl-2 Proteins. J Biol Chem. 2002;277:15654-15660.
  4. Yamasoba T, Harris C, Shoji F, Lee RJ, Nuttall AL, Miller JM. Influence of intense sound exposure on glutathione synthesis in the cochlea. Brain Res. 1998;804(1):72-78.
  5. Ohinata Y, Miller JM, Altschuler RA, Schacht J. Intense noise induces formation of vasoactive lipid peroxidation products in the cochlea. Brain Res. 2000;878(1-2):163-173.
  6. Alvarado JC, Fuentes-Santamaría V, Gabaldón-Ull MC, Juiz JM. An Oral Combination of Vitamins A, C, E, and Mg++ Improves Auditory Thresholds in Age-Related Hearing Loss. Front Neurosci. 2018;12:527.

Disclaimer

ACEMg (Soundbites) is a multi-patented inner ear neuroprotectant formulated as a dietary supplement and regulated as such by the FDA. It is available without a prescription and is intended to support the normal biological function of outer hair cells and supporting cells in the cochlea, helping insulate them from oxidative stress. Our structure/function claims are consistent with FDA regulations for dietary supplements and are supported by clinical data. Soundbites is not a drug and is not intended to diagnose, treat, cure, or prevent any disease, including sensorineural hearing loss (SNHL), which is not classified as a disease. Only FDA-approved prescription drugs are permitted to make such claims. Individual results may vary.

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