- Rhodopsin Production: Vitamin A is absolutely critical for the formation of Rhodopsin, the light-sensitive protein found in the retina. A deficiency in Vitamin A can lead directly to night blindness and overall impaired vision.
- Corneal Health: Vitamin A is essential for maintaining the health and clarity of the cornea and the conjunctiva, helping to prevent dry eyes and reducing the risk of corneal damage.
The Antioxidant Powerhouse: Lutein, Zeaxanthin, and Lycopene
Guava, especially the pink-fleshed variety, is packed with carotenoids that are crucial for filtering harmful light.
- Macular Protection: Lutein and Zeaxanthin are the only dietary carotenoids that are deposited in high concentrations in the macula of the eye. They act like internal sunglasses, absorbing up to 90% of harmful blue light (the light emitted by screens) that can damage the retina. By boosting your intake of these compounds, you are literally fortifying the delicate central part of your vision.
- Fighting Free Radicals: Guava contains incredibly high levels of the powerful antioxidant Lycopene (more than many tomatoes!). Lycopene and other antioxidants fight free radicals, which are unstable molecules that accelerate cell damage, leading to age-related macular degeneration (AMD) and cataract formation. Regular intake provides crucial cellular defense.
The Vitamin C Advantage
Guava is famously one of the richest natural sources of Vitamin C, often containing more than four times the amount found in an orange.
- Collagen and Structure: Vitamin C is essential for the production of collagen, a structural protein that maintains the integrity of the blood vessels within the eye and provides shape to the cornea.
- Cataract Prevention: Studies suggest that maintaining high levels of Vitamin C in the diet can help delay the onset and progression of cataracts, a condition where the lens of the eye becomes cloudy. High Vitamin C levels are thought to help prevent the oxidation of proteins in the lens.Continue reading…
