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Effect of an oral supplementation with a formula containing R-lipoic acid in glaucoma patients

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Objective: To analyse the safety and effectiveness of the oral administration of a commercialised supplement containing R-alpha lipoic acid (ALA), taurine, vitamins C and E, lutein, zeaxanthin, zinc, copper and docosahexaenoic acid (DHA), in patients with primary open angle glaucoma (POAG), and in control subjects. Material and methods: A prospective study of cases and controls was carried out, including 30 participants of both genders that were divided into: POAG Group (n = 15) and a control group (CG; n = 15), assigned to the oral intake of NuaDHA preparations Vision® (1 pill/day) + NuaDHA 1000 (2 pills/day) for 6 months. Participants were interviewed, ophthalmologically examined, and peripheral blood was taken for routine analysis and the determination of the pro-oxidant [malondialdehyde (MDA)] and total antioxidant status (TAS). Statistical analysis was performed using the SPSS 22.0 program. Results: After 6 months of supplementation, there was a significant increase in the plasma TAS (1.073 ± 0.090 mM vs 1.276 ± 0.107 mM, P = .028), along with a parallel decrease in MDA (7.066 ± 1.070 μM vs 2.771 ± 0.462 μM, P = .005) in the POAG group. The MDA also decreased in the control group (6.17 ± 1.336 vs. 2.51 ± 0.391, P = .028). The Schirmer test improved (20–30%) and the subjective dry eye signs/symptoms noticeably decreased in the POAG group versus the CG. Conclusions: Formulations containing antioxidant vitamins, ALA and DHA, administered for 6 consecutive months, counteracted the oxidative stress by further stabilising the morphological/functional parameters of both the ocular surface and the glaucoma, without presenting with adverse effects or intolerances.
Objetivo: analizar la seguridad y efectividad de la administración oral de un suplemento comercializado que contiene ácido alfa-R-Lipoico (ALA), taurina, vitaminas C y E, luteína, zeaxantina, zinc, cobre y ácido docosahexaenoico (DHA) en pacientes con glaucoma primario de ángulo abierto (GPAA) y sujetos control. Material y Métodos: se realizó un estudio prospectivo de casos y controles que incluyó 30 participantes de ambos sexos, divididos en: pacientes con GPAA (GGPAA; n = 15) y sujetos sanos (GC; n = 15) asignados a tomar durante 6 meses los preparados NuaDHA Visión® (1 comp./dia) + NuaDHA 1000 (2 comps./dia). Los participantes fueron entrevistados, examinados oftalmológicamente, extrayendo sangre periférica que fue procesada para analítica convencional y determinación de actividades pro-oxidante [malonildialdehido (MDA)] y estado antioxidante total (EAT). El análisis estadístico se realizó mediante el programa SPSS 22.0. Resultados: tras 6 meses de suplementación los niveles plasmáticos de EAT aumentaron significativamente 1,073 ± 0,090 mM vs 1276 ± 0,107 mM, p = 0,028, disminuyendo en paralelo los de MDA 7,066 ± 1,070 μM vs 2761 ± 0,462 μM, p = 0.005 en el GGPAA. El MDA también descendió significativamente en el GC 6,17 ± 1336 vs 2,51 ± 0,391, p = 0,028. Los pacientes con GPAA mostraron valores del test de Schirmer notablemente mayores 20-30%) y mejoraron subjetivamente los signos/síntomas de ojo seco, frente a los resultados del GC. Conclusiones: las formulaciones que contienen vitaminas antioxidantes, ALA y DHA administradas durante 6 meses consecutivos contrarrestaron el estrés oxidativo, y estabilizaron los parámetros morfológicos/funcionales de la superficie ocular y del glaucoma, sin presentar efectos adversos o intolerancias.
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Received 1 September 2019, Accepted 19 November 2019, Available online 5 February 2020.
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