Drs. Gerson, Singh, Gioia, and Rafieetary discuss the role of B vitamins in managing age-related macular degeneration (AMD).
Jeffry Gerson, OD, FAAO, is an optometrist at Grin Eye Care. Neda Gioia, OD, CNS, FMCP, FOWNS, is an integrative optometrist, functional medicine practitioner, and the founder of Integrative Vision Corp. Mohammad Rafieetary, OD, FAAO, practices at the Charles Retina Institute, which serves East Tennessee, West Arkansas, and North Mississippi. Rishi Singh, MD, is the chair of ophthalmology at Mass Eye and Ear in Boston, Massachusetts.
Management of early-stage AMD
When a patient is initially diagnosed with early-stage AMD, it often raises questions about treatment options. There exists a notable “gap” in care for these early-stage patients, as the AREDS and AREDS 2 studies mainly focus on intermediate and advanced stages of the disease.
“When you look at the AREDS studies, they have obviously been well indicated for those patients with either intermediate AMD in both eyes or advanced AMD in one eye.”
As a result, clinicians tend to emphasize lifestyle changes and nutritional interventions alongside patient education and family involvement during the early stages to prevent further progression of the condition. However, there has historically been hesitancy among clinicians to prescribe intensive, long-term supplements to younger patients, underscoring the need for safe and effective preventive measures.
The biological rationale for B vitamins
B vitamins play a vital role as essential cofactors for many enzymatic reactions and are crucial for overall cellular function. They are especially important for maintaining mitochondrial health, which is essential given the high-energy demands of ocular tissues, including the macula. Emerging research increasingly suggests a link between dietary intake or circulating levels of B vitamins and the risk of AMD.1
“There are studies that show B vitamins can help prevent or decrease the risk of developing advanced AMD, help decrease the risk of mild progressing, or, in some cases, can decrease the risk of developing AMD in the first place. That's the ultimate in primary prevention.”
One important function of B vitamins is their ability to help manage homocysteine levels; elevated homocysteine is associated with a higher risk of AMD and retinal vascular diseases. Specifically, vitamin B6 contributes to the production of glutathione, a master antioxidant that supports cellular function within the eyes.
Additionally, vitamin B12 plays a critical role in addressing the vascular aspects of AMD, including hypoxia and choroidal blood flow.1 "AREDS did a good job talking about the antioxidant or oxidative stress of macular degeneration, but nobody's really been watching the vascular component of this and the hypoxic nature of this disease," noted Dr. Rafieetary. "I'm glad to see that now we're thinking about the vascular component of this disease."
Clinical implementation and formulations
Early intervention is essential for patients with AMD. Often, by the time many patients receive treatment, they are already in the intermediate stage, highlighting the importance of earlier risk identification and intervention. It is important to identify individuals at high risk, particularly those with a family history of AMD or certain systemic conditions—such as malabsorption disorders or those using proton pump inhibitors (PPIs)—who could benefit from early supplementation.
Specific B vitamin formulations, like PreserVision AREDS 3, may encourage patients to seek this intervention earlier. Also, the lower zinc content in these formulations can help reduce gastrointestinal discomfort, improving patient tolerance. Additionally, combining multiple science-backed nutrients into a single formulation may help simplify supplementation regimens and reduce pill burden.
"We’re treating the patient, right? Not the condition. Many of these patients also have other flags that really reflect potential B deficiencies," explained Dr. Gioia. "So whether it's another health condition or long-term PPI use, many of these factors can become apparent when we take a closer look at the patient's overall health history."
Future trends in eyecare
Eyecare professionals need to adopt a new mindset, viewing themselves as "financial advisors of sight." This perspective emphasizes the importance of long-term visual performance over decades. B vitamins may play a crucial role in establishing a standard of care for managing AMD.
Furthermore, fostering interdisciplinary collaboration is vital; primary care physicians, cardiologists, and other specialists must recognize the significant role of nutritional support in promoting eye health.
