Instant coffee is making a comeback among younger audiences, yet recent studies suggest it may carry unexpected risks for eye health.
Originally developed in the early 1900s and later gaining traction during World War II due to rationing, instant coffee has been a common choice in many American homes. However, new research is indicating a potential connection between instant coffee and age-related macular degeneration (AMD), a major cause of vision impairment.
A recent study from Hubei Medical University and Taihe Hospital in China, published in the June 2025 issue of Food Science & Nutrition, explored how instant coffee might impact eye health.
Researchers identified a genetic link between instant coffee consumption and dry AMD, which wasn’t found with regular or decaffeinated coffee. While the study doesn’t claim that instant coffee directly causes AMD, it does recommend that individuals at higher risk of the condition should reduce their intake.
The researchers concluded, “Instant coffee may increase the risk of AMD, and reducing its intake may help prevent dry AMD.” They specifically advised those at risk to avoid instant coffee.
This study arrives just as more people in the U.S. are turning to instant coffee for their morning fix. Interestingly, experts point out that it’s the Millennials and Generation Z who are largely shifting this trend. Nielsen IQ reported that though only 15% of consumers currently prefer instant coffee for breakfast, younger generations are changing these dynamics.
Additionally, Nielsen IQ noted instant coffee accounts for nearly 20% of growth in the packaged coffee market, which makes you think twice in light of the new findings.
Consulting Dr. James Dello Russo, an optometrist from New Jersey, he noted that while the study presents a correlation and not a direct cause, the degree of risk calls for caution. AMD affects the macula, the part of the retina crucial for clear vision necessary for activities like reading or driving.
Dello Russo explained, “While peripheral vision remains, AMD seldom leads to complete blindness but can significantly affect your quality of life and independence.” Symptoms may include blurred central vision and difficulty reading, along with straight lines appearing warped.
The optometrist further mentioned that the dehydration process used for instant coffee can generate compounds leading to inflammation and oxidative stress, which are major contributors to AMD. “While this study shows correlation rather than definitive causation, the magnitude of the risk does require caution,” he reiterated.
He recommended that patients consider switching to brewed coffee, especially if they have additional risk factors, and that early detection is vital in managing AMD.
If anyone is noticing symptoms such as blurred vision or difficulty reading, Dello Russo suggested scheduling an eye exam promptly.
