Objective:

To explore specific micronutrients and dosages that may benefit patients with diabetes, particularly in relation to diabetic retinopathy (DR) and overall ocular health.

Key Findings:

• Vitamin C supplementation may improve islet cell function but should be limited to <500 mg/d to avoid interference with glucose monitoring.
• Vitamin D levels <18.6 ng/mL are associated with increased severity of DR; supplementation of at least 5000 IU/d is recommended.
• Deficiencies in B vitamins (B1, B6, B9, B12) are linked to higher incidence of DR, with benfotiamine showing promise in reducing retinal injury.
• Minerals like chromium, magnesium, and zinc are important for insulin production and sensitivity; deficiencies correlate with DR severity.
• Omega-3 fatty acids from fish oil are associated with reduced risk of sight-threatening DR.
• Plant-based compounds like French Maritime Pine bark and curcumin show potential benefits in managing DR, supported by clinical evidence.

Interpretation:

Micronutrient supplementation may play a critical role in managing diabetes and its ocular complications, particularly DR, by addressing deficiencies and supporting metabolic health, with a focus on ocular outcomes.

Limitations:

• The article primarily discusses observational studies and interventional trials, which may have varying levels of evidence.
• Individual responses to supplementation can vary significantly, and not all patients may benefit equally; personalized approaches are essential.

Conclusion:

Ocular nutritional supplementation could be a valuable adjunctive strategy in the management of diabetes and prevention of diabetic retinopathy, warranting further research and individualized patient recommendations based on specific health profiles.