Why Testing Your Vitamin D Can Safeguard Your Sight

We explain why vitamin D3 matters for eye health, where research points across dry eye, glaucoma, macular degeneration, diabetic retinopathy, and cataracts, and how to make smart, test-guided choices. We share target intake ranges, personal practices, and a simple plan: don’t guess, test.

• vitamin D3 as a hormone shaping inflammation, immunity and oxidative stress
• widespread deficiency due to limited sun, diet and indoor life
• target serum 25(OH)D levels and common intake ranges for seniors
• links between low D and dry eye symptoms
• associations with glaucoma risk and optic nerve resilience
• protective signals in macular degeneration and retinal cells
• connections to diabetic retinopathy through vascular health
• cataract risk patterns in people with low vitamin D
• practical steps: test first, supplement with D3

Visit us at naturaleyecare.com where we can do a free basic consultation with you on the phone. If you need an individual consultation for cataracts, you can contact Dr. Grossman through his website.

If you have any questions, call us at 845 475 4158

And if you don't already subscribe to this podcast, please subscribe and review us.

Transcript

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Welcome And Podcast Focus

SPEAKER_00 0:05

This is the Natural Eye Care Podcast, hosted by leading holistic optometrist Dr. Mark R. Grossman. Senior citizens are at the highest risk of developing macular degeneration, glaucoma, cataracts, dry eye, and more. The Natural Eye Care Podcast provides complementary and natural approaches to vision problems, eye health, and overall health. Find out how lifestyle, diet, and nutrition can help maintain healthy vision and even improve eyesight. Dr. Grossman has degrees in optometry, biology, physical education, and learning disabilities. He is a New York State licensed acupuncturist. With 40 years of experience, he has co-authored the book Natural Eye Care: Your Guide to Healthy Vision and Healing.

SPEAKER_01 0:51

Dr. Grossman.

Vitamin D3 Basics And Intake

SPEAKER_01 0:52

This is Dr. Mark Grossman, integrative medical optometrist, acupuncturist, in practice for over 45 years, and author of five books on natural eye care. And today's podcast is on something I take every day, super important for your eyes and general health. That's right, vitamin D3. Vitamin D is often called the bone vitamin, but that's only part of the story. Vitamin D3 also influences systems your eyes rely on every day, especially as we get older. It affects inflammation, immune regulation, oxidative stress, and even how the body manages blood vessel growth. And here's the real-world issue: most people don't get enough vitamin D consistently. Food sources are limited, sunlight is seasonal, and modern indoor life takes care of the rest. So instead of guessing,

How Vitamin D3 Works In The Body

SPEAKER_01 2:00

the article is about a more practical approach. Understand what vitamin D3 does. See where the research is pointing for eye health and taking the simplest action that actually helps get your vitamin D levels checked. For seniors, those over 70, including myself, the recommended daily intake of vitamin D is 800 IUs to maintain bone health and prevent deficiency, with some recommendations suggesting up to 1,000 IUs daily. Up to 5,000 IUs is often recommended to supplement daily. That's what I take personally, given that a large portion of the senior population is deficient in vitamin D. A serum 25D level is greater than 50 nanometers liters, is generally considered sufficient. So what is vitamin D3? It's a hormone. It's the form your body can make when sunlight hits your skin. It is then processed by the liver and kidneys into active forms that your tissues can use.

Links To Major Eye Diseases

SPEAKER_01 3:14

Vitamin D is being studied across many eye conditions, such as dry eye, glaucoma, myopia nearsightedness, thyroid eye disease, diabetic retinopathy, macular degeneration, and cataracts. Vitamin D is not a standalone treatment for these conditions, but it's foundational, especially if you're deficient. What happens in dry eye? Dry eyes can look minor until you live with it. Burning, redness, gritty sensation, watery eyes. Studies have found that people with dry eyes have lower vitamin D levels. Correcting vitamin D deficiency may help better tear stability, reduced inflammation, and improve symptoms. And how about glaucoma? Glaucoma is one of the leading causes of irreversible vision loss. Eye pressure is a major factor, but not the whole story. Research suggests that vitamin D status may be associated with glaucoma risk. Vitamin D won't replace glaucoma eye drops or procedures, but if you've got vitamin D deficiency, you are more at risk for optic nerve degeneration. Macular degeneration. Macular degeneration affects the macula, the part of the retina responsible for sharp central vision. Studies have shown lower vitamin D levels in people with macular degeneration. So again, vitamin D has a protective effect in the retinal cells. Diabetic retinopathy. In diabetes, eye damage is driven by chronic inflammation, oxidative stress, and changes in the blood vessels. Here again, research has linked vitamin D levels with higher risk of diabetic retinopathy. Cataracts. Extremely common with age. Several studies suggest people with cataracts are more likely to have low vitamin D levels. Again, and when COVID was present, people with lower vitamin D levels were more susceptible to issues with COVID.

Test Don’t Guess And Next Steps

SPEAKER_01 5:34

So the practical bottom line is don't guess. Test. Ask your doctor to test you to see if you're deficient in vitamin D. And like I said, I myself take 5,000 IUs per day for protection and prevention. As Benjamin Franklin said, an ounce of prevention is worth a pound of cure. So please add vitamin D3, 5,000 IUs per day, and it's really great to link it with vitamin K, that's what we do at Natural Eye Care, to help protect your precious gift of sight.

Resources And Subscribe

SPEAKER_00 6:14

For more information, visit naturaley care.com and Dr. Grossman2020.com. Our email address is info at naturaleycare.com. If you have any questions, call us 845 475 4158. And if you don't already subscribe to this podcast, please subscribe and review us.