Optic Nerve Support Supplements: What the Research Actually Shows

No supplement has been proven to protect or repair the optic nerve. The nutrients researchers study most for optic nerve health are two forms of vitamin B3 (nicotinamide and nicotinamide riboside), pyruvate, ginkgo biloba, and CoQ10, mainly because the nerve cells involved use so much energy. The strongest human evidence so far is for nicotinamide, alone or paired with pyruvate, and even that is early, short-term, and still being tested in large trials.

If you searched "optic nerve support supplement" after an eye exam, you are in good company. This guide walks through what each nutrient is, what the studies actually found (including the ones that came up empty), and what to bring to your eye doctor.

Key Takeaways

• The optic nerve is built from retinal ganglion cells, some of the most energy-hungry nerve cells in the body. That is why researchers look at nutrients involved in cellular energy.
• Nicotinamide (vitamin B3) has the most human data: two small, short trials (about 2 to 3 months) showed changes on retinal function or visual field tests. Large phase 3 trials are still running.
• A 24-month trial of nicotinamide riboside (NR) at 300 mg a day, reported as a 2025 conference abstract, found no slowing of glaucoma progression compared with placebo.
• Ginkgo biloba studies are mixed: one small 2003 trial showed visual field changes, while later trials using the same or higher doses did not.
• None of these nutrients is approved to treat any eye disease. High-dose nicotinamide carries a liver-safety warning, so talk to your eye doctor before trying anything.

What Is the Optic Nerve, and Why Does Nutrition Come Up?

The optic nerve is the cable that carries visual signals from your eye to your brain. It is made of more than a million long fibers, and each fiber belongs to a retinal ganglion cell that sits in your retina.

Those cells are energy hogs. Their fibers are long and thin, and they fire constantly from the moment you open your eyes. Think of a long-distance power line that has to stay energized all day: any dip in supply shows up at the far end first.

That is the reason nutrition enters the conversation. Researchers have found that energy metabolism inside these cells can falter with age and under stress. So they ask a simple question: could nutrients that feed the cell's energy machinery, its mitochondria, help these cells cope? It is a reasonable question. It is not yet a proven answer.

Which Nutrients Do Researchers Study for Optic Nerve Health?

Four groups of nutrients come up again and again in optic nerve research. Here is a quick side-by-side before we get into the studies.

Nutrient	Why researchers are interested	Best human evidence so far	Main limit
Nicotinamide (vitamin B3)	Raises NAD+, a molecule cells need to make energy	Two small trials of 2 to 3 months showed changes on retinal function and visual field tests	Short trials; high doses need liver monitoring; phase 3 results pending
Nicotinamide riboside (NR)	Another NAD+ building block	One 24-month trial (300 mg/day) found no slowing of progression	Strong animal data has not carried over to people so far
Pyruvate	Feeds the mitochondria; levels dropped in the retina in animal glaucoma models	Tested only in combination with nicotinamide in people	Its effect on its own is unknown in humans
Ginkgo biloba	Antioxidant compounds; studied for blood flow	Mixed: one positive small trial, later trials found no difference	Small studies; can affect bleeding risk
CoQ10	Part of the mitochondrial energy chain and an antioxidant	Mostly lab and animal research plus small early human studies	No large human trials

What Does the Research Show for Vitamin B3 (Nicotinamide and NR)?

Vitamin B3 has the most research behind it, but the results depend a lot on which form was tested and for how long. Both nicotinamide and nicotinamide riboside are building blocks for NAD+, the molecule your mitochondria use to turn food into usable energy.

The animal research that started it

In a 2017 study in Science, Williams and colleagues worked with mice bred to develop glaucoma-like nerve damage as they age. They found that NAD+ dropped in the retina with age, and that high doses of nicotinamide in the animals' drinking water kept most treated eyes from developing the damage seen in untreated mice. This was mouse research, at doses far higher than a typical supplement, so it pointed researchers toward human trials rather than answering the question.

The small human trials of nicotinamide

In a 2020 crossover trial in Clinical & Experimental Ophthalmology, Hui and colleagues enrolled 57 people already being treated for glaucoma; each took nicotinamide (working up to 3 grams a day) and a placebo for 12 weeks apiece. A measure of inner retinal function improved by about 14.8% on nicotinamide (P = .02). Eye pressure and nerve fiber thickness did not change, and 12 weeks is far too short to show anything about long-term vision.

A 2022 phase 2 trial in JAMA Ophthalmology (De Moraes and colleagues) gave 32 people with treated glaucoma either nicotinamide plus pyruvate or placebo for about two months. The treatment group had more improving spots on their visual field test (median 15 vs. 7, P = .005), but broader measures such as mean deviation did not differ. Because the two nutrients were given together, the trial cannot say which one did what.

In 2025, the American Glaucoma Society and the American Academy of Ophthalmology issued a joint statement calling nicotinamide promising but unproven. They noted it is not approved for glaucoma, that doses of 3 grams a day or more should only be used inside monitored trials because of rare liver injury, and that niacin is not a substitute. We walked through that statement in detail in our post on what the AAO's NAD+ statement means for you.

The longer trial of nicotinamide riboside

Nicotinamide riboside looked strong in mouse studies. The first long human test was less encouraging. In the INSIGHT trial from Hong Kong, presented as an abstract at the 2025 ARVO meeting, 118 people with progressing glaucoma took 300 mg of NR or placebo daily for 24 months. There was no meaningful difference in nerve fiber thinning or visual field decline between groups. In a prespecified subgroup analysis, older participants on NR showed slightly faster thinning. That finding is small, comes from a subgroup, and has not yet appeared as a full peer-reviewed paper, but it is an important reminder that promising animal data does not always hold up in people.

What is still coming

Several large phase 3 trials are testing whether nicotinamide can slow glaucoma progression over years, including the NAMinG trial in the United Kingdom and studies in Sweden and Singapore. At the 2026 AAO meeting, glaucoma specialist Derek Welsbie, MD, summed up the field this way: the early signals are interesting, the measurements used so far are noisy, and doctors are waiting for those randomized trial results.

What About Pyruvate?

Pyruvate is the molecule your cells make when they break down glucose, and it is the main fuel handed to the mitochondria. Researchers became interested in it after a 2020 study in PNAS by Harder and colleagues found that retinal pyruvate levels fell in glaucoma-model mice before nerve damage could be detected. Oral pyruvate reduced nerve degeneration in both mouse and rat models.

In people, pyruvate has only been tested alongside nicotinamide, in the two-month trial described above. A larger phase 3 trial at Columbia and Stanford is now testing 3 grams of nicotinamide plus 1 gram of calcium pyruvate daily for 21 months; it finished enrolling in 2025 and has not reported results. For the basics of what pyruvate does in the body, see our explainer on calcium pyruvate and your eyes.

Does Ginkgo Biloba Help the Optic Nerve?

The honest answer is that the evidence is mixed. Ginkgo biloba extract contains antioxidant flavonoids and has been studied for its effects on blood flow, which is why researchers have tested it in normal-tension glaucoma, a form where nerve damage happens even with normal eye pressure.

A small 2003 crossover trial in Ophthalmology (Quaranta and colleagues, 27 patients, 40 mg three times daily for four weeks) reported improved visual field scores. But a 2014 trial in Investigative Ophthalmology & Visual Science (Guo and colleagues, 35 patients, the same dose and duration) found no difference from placebo. A 2025 study in the Canadian Journal of Ophthalmology (Hodgson and colleagues, 17 patients, 240 mg a day for four months) found no improvement in blood flow around the macula on advanced imaging. We cover all of these in our post on what ginkgo biloba actually does for your eyes.

One safety note: ginkgo can affect how your blood clots, so it matters if you take blood thinners or have a procedure coming up.

Is CoQ10 Good for the Optic Nerve?

CoQ10 is biologically relevant, but the human evidence is thin. It sits inside the mitochondria, where it helps pass electrons down the energy-making "assembly line" and works as an antioxidant right where most free radicals are made.

A 2017 review in Current Medicinal Chemistry (Zhang and colleagues) summarized lab and animal studies in which CoQ10 helped retinal ganglion cells withstand stress, along with small early human studies. There are no large human trials of CoQ10 for the optic nerve. If you want the fuller picture, our post on why your aging retina needs CoQ10 goes deeper on the biology.

How Should You Think About Supplements and Your Optic Nerve?

A calm, practical approach looks something like this:

• Keep your prescribed care. If you have glaucoma or high eye pressure, your eye drops, procedures, and regular visual field tests come first. No supplement replaces them.
• Bring your list to your eye doctor. Include doses. Your doctor can spot interactions and tell you whether anything is worth trying.
• Watch high doses of nicotinamide. The doses used in glaucoma trials are much higher than typical supplements, and the AGS/AAO statement recommends liver monitoring.
• Be careful with ginkgo if you take blood thinners.
• Be skeptical of big promises. Any product claiming to "repair," "restore," or "regenerate" the optic nerve is promising something no study has shown.

Our guide to eye supplement safety and questions to ask your eye doctor has a ready-made list for your next visit.

What This Means for You

The research on nutrients and the optic nerve is real and worth following, but it is still early. Nicotinamide has the most promising short-term human data, pyruvate has only been tested in combination, ginkgo's trials disagree, CoQ10 lacks human trials, and the one long NR trial did not show a benefit. The next two years of phase 3 results should tell us much more.

If you are looking for a daily supplement focused on cellular energy and antioxidant support for healthy ocular aging, Sight Guard is our ophthalmologist-formulated blend of nicotinamide riboside, calcium pyruvate, CoQ10, ginkgo biloba, and lutein. Talk to your eye doctor before adding any supplement, especially if you take blood thinners.

Frequently Asked Questions

What is the best supplement for optic nerve health?

No supplement has been proven to protect the optic nerve. Nicotinamide (vitamin B3) has the most human research, but the trials so far are small and short, and large phase 3 trials are still underway. Your eye doctor is the best person to help you weigh options for your situation.

Can supplements repair a damaged optic nerve?

No. There is no evidence that any supplement can repair or regrow optic nerve fibers in people. Research is focused on whether certain nutrients might help stressed retinal cells function better, which is a very different question.

Is vitamin B3 good for the optic nerve?

Vitamin B3 in the form of nicotinamide is being actively studied for glaucoma, with encouraging short-term results in small trials. It is not approved for glaucoma, and high doses (3 grams a day or more) are not recommended outside clinical trials because of rare liver injury. Niacin, another form of B3, is not a substitute.

Is nicotinamide riboside the same as nicotinamide?

No. Both are building blocks for NAD+, but they are different molecules that the body processes differently. Most of the encouraging human glaucoma data so far used nicotinamide, while a 24-month NR trial did not show a benefit. Our post on NR vs. nicotinamide explains the difference.

Should I take a supplement if I have glaucoma?

That is a decision to make with your eye doctor. Supplements are not a treatment for glaucoma and should never replace prescribed drops or procedures. If you are curious about the research, bring this article to your next appointment.

References

1. Williams PA, Harder JM, Foxworth NE, et al. Vitamin B3 modulates mitochondrial vulnerability and prevents glaucoma in aged mice. Science. 2017;355(6326):756-760. DOI: 10.1126/science.aal0092.
2. Hui F, Tang J, Williams PA, et al. Improvement in inner retinal function in glaucoma with nicotinamide (vitamin B3) supplementation: a crossover randomized clinical trial. Clinical & Experimental Ophthalmology. 2020;48(7):903-914. PMID: 32721104. DOI: 10.1111/ceo.13818.
3. De Moraes CG, John SWM, Williams PA, Blumberg DM, Cioffi GA, Liebmann JM. Nicotinamide and pyruvate for neuroenhancement in open-angle glaucoma: a phase 2 randomized clinical trial. JAMA Ophthalmology. 2022;140(1):11-18. PMID: 34792559. DOI: 10.1001/jamaophthalmol.2021.4576.
4. Shukla AG, Cioffi GA, John SWM, Wang Q, Liebmann JM. American Glaucoma Society-American Academy of Ophthalmology position statement on nicotinamide use for glaucoma neuroprotection. Ophthalmology Glaucoma. 2025;8(2):112-116. DOI: 10.1016/j.ogla.2025.01.002.
5. Leung CKS, Guo Y, Mak HK, et al. Investigation of Nicotinamide riboside Supplementation Impact on Glaucoma Health Trial (INSIGHT). Investigative Ophthalmology & Visual Science. 2025; ARVO Annual Meeting Abstract.
6. Leung CKS, Ren ST, Chan PPM, et al. Nicotinamide riboside as a neuroprotective therapy for glaucoma: study protocol for a randomized, double-blind, placebo-control trial. Trials. 2022. PMID: 35039056. DOI: 10.1186/s13063-021-05968-1.
7. Harder JM, Guymer C, Wood JPM, et al. Disturbed glucose and pyruvate metabolism in glaucoma with neuroprotection by pyruvate or rapamycin. Proceedings of the National Academy of Sciences. 2020;117(52):33619-33627. PMID: 33318177. DOI: 10.1073/pnas.2014213117.
8. Shukla AG, Tsamis E, De Moraes CG, et al. Nicotinamide and pyruvate in open-angle glaucoma: a randomized controlled trial on neuroprotection, design and methodology. Ophthalmology Glaucoma. 2026;9:241-249. PMID: 41461224. DOI: 10.1016/j.ogla.2025.12.008.
9. Quaranta L, Bettelli S, Uva MG, Semeraro F, Turano R, Gandolfo E. Effect of Ginkgo biloba extract on preexisting visual field damage in normal tension glaucoma. Ophthalmology. 2003;110(2):359-362. PMID: 12578781. DOI: 10.1016/S0161-6420(02)01745-1.
10. Guo X, Kong X, Huang R, et al. Effect of Ginkgo biloba on visual field and contrast sensitivity in Chinese patients with normal tension glaucoma: a randomized, crossover clinical trial. Investigative Ophthalmology & Visual Science. 2014;55(1):110-116. PMID: 24282229. DOI: 10.1167/iovs.13-13168.
11. Hodgson K, Palakkamanil MM, Zhang A, et al. Effect of ginkgo biloba extract on macula and peripapillary perfusion examined using optical coherence tomography angiography. Canadian Journal of Ophthalmology. 2025;60(4):e566-e571. PMID: 39961352. DOI: 10.1016/j.jcjo.2025.01.015.
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13. Gallagher J. Glaucoma neuroprotection: still searching for the right notes. Glaucoma Physician. October 12, 2026.

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