Eye Conditions

The APOE4 gene variant and myelin may be connected in ways that affect brain health. New research suggests that cells that produce myelin may play an important role in how the APOE4 variant influences Alzheimer’s disease risk. Myelin is also essential to the optic nerve, which carries visual information from your eyes to your brain.

APOE4 is a genetic risk factor, not a diagnosis. Many people who carry the variant never develop Alzheimer’s disease. Other genes, ancestry, age, cardiovascular health, and environmental factors may also influence a person’s risk. ¹

Researchers are now investigating why APOE4 affects people differently. Recent findings point toward oligodendrocytes, which are specialized brain cells that make myelin. The results do not prove that protecting myelin will prevent Alzheimer’s disease. However, they provide another clue about how APOE4 may affect the aging brain.
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Sugary drinks and eye health may seem unrelated, but what you sip each day can affect much more than your thirst. A new long-term study found that people who consumed at least one sugar-sweetened drink daily had more than twice the risk of developing stomach cancer compared with people who rarely drank them. The study does not prove that sugary drinks caused the cancer, but the size of the association deserves attention.

Sodapop is not the only drink worth examining. Fruit punches, lemonades, sports drinks, energy drinks, sweetened coffees, and some electrolyte beverages can contain surprising amounts of added sugar. Cutting back does not mean that you should automatically switch to diet beverages containing artificial sweeteners. There are better everyday choices, including water, lemon water, coffee, tea, green tea, and drinks lightly sweetened with stevia.

How much sugar is hiding in your favorite drink? When do you actually need electrolytes? Are diet drinks a healthy substitute? This article examines the new stomach cancer research, the relationship between sugary drinks and eye health, the proper use of electrolyte beverages, and practical ways to reduce sugar without giving up every occasional treat.

What Counts as a Sugary Drink?

A sugar-sweetened beverage is any drink containing sugar that was added during manufacturing or preparation. Common examples include:
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Brain fog can make it hard to recall words, concentrate, or complete everyday tasks. Even after spending enough time in bed, you might feel exhausted. Your eyes might feel dry, burn, or have trouble shifting focus.

What causes brain fog? Poor or broken sleep is one common cause. Sleep problems can affect your energy, memory, attention, and eye comfort. They can leave you feeling mentally cloudy and physically drained during the day.

Sleep problems are not the only possible explanation for tired eyes and brain fog. Diabetes, anemia, thyroid disorders, medications, nutritional deficiencies, and other health conditions can cause similar symptoms. In this article, we talk about symptoms of brain fog, poor sleep, and why tired eyes and brain fog often occur together. We also point out how excessive screen time can lead to brain fog. And we offer practical tips: eye exercises, easy lifestyle changes, nutritional support, and when to call a doctor.
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Want to support healthier vision and improve your overall health as you age? One practical place to begin is to eat fewer ultra-processed foods and choose more whole or minimally processed foods. You do not need a perfect diet, nor do you need to eliminate every packaged product. Small, consistent substitutions can improve the quality of your diet while reducing ingredients and processes that promote inflammation, oxidative stress, poor blood sugar regulation, diabetes, heart disease, and cancer.

A diet dominated by ultra-processed foods may raise the risk of serious age-related eye conditions, including macular degeneration, cataracts, and glaucoma. These products may contribute to high blood sugar, inflammation, and oxidative stress that damage delicate cells and blood vessels in the eyes. A diet lacking essential fatty acids and other nutrients may also interfere with healthy tear production and contribute to dry eye. When you choose these foods, you miss out on crucial nutrients. And, many ultra-processed foods are high in calories while providing few useful nutrients. Hence the term “junk food.” ^{1 2}

What Are Ultra-Processed Foods?

Ultra-processed foods are industrial formulations made from extracted ingredients and additives rather than intact foods. They often undergo processes such as molding, pre-frying, or chemical modification and may contain flavors, colors, sweeteners, emulsifiers, or other substances that are rarely used in a home kitchen. ³
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Detoxification is essential for maintaining health. It is the body’s natural process of identifying, breaking down, and eliminating potentially harmful substances. The liver does most of this work, while the kidneys, digestive system, lungs, skin, and lymphatic system help remove waste through urine, stool, breath, and sweat. The body continuously detoxifies itself; it does not require special cleanses or extreme diets to perform these essential functions. Several mechanisms in the body accomplish this work.

Two of the most important are the glymphatic and lymphatic systems.

The Glymphatic System

The glymphatic system is the brain’s waste-clearance pathway. It relies on glial cells and cerebrospinal fluid to remove metabolic waste, especially during deep sleep.
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A widely used food thickener, xanthan gum, may have more complex effects on the gut than previously recognized. Xanthan gum helps give many highly processed ice creams, sorbets, and yogurts their gooey, creamy texture.* Valued for its thickening, stabilizing, and gelling properties, xanthan gum is among the food industry’s most widely used additives. It can also make liquids easier and safer to swallow for people who have difficulty swallowing, a condition known as dysphagia. The additive is common in ultra-processed foods, gluten-free products, baked goods, protein shakes, sauces, gravy, salad dressings, and supplements. 

Research from the Federal University of São Paulo (UNIFESP) in Brazil raises questions about the effects of prolonged consumption of xanthan gum.¹ Rats that received it for ten weeks developed colon inflammation, changes in their gut microbiota, and reduced intestinal barrier integrity. 
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Eye conditions such as macular degeneration can sometimes lead to visual hallucinations. A visual hallucination means seeing something that is not really there.

The eyes send visual signals to the brain, and the brain interprets them. When vision loss reduces the amount of information reaching the brain, the brain may fill in the missing visual details. This can cause a person to see grid patterns, people, lines, shapes, or other images that are not actually in front of them.

This is known as Charles Bonnet syndrome (CBS). It is linked to vision loss and does not mean that a person is losing touch with reality.

Which eye conditions can cause visual hallucinations? How can you identify and manage them? Is it possible to prevent these eye conditions in the first place? Can nutrition and supplements help?
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News for July 4, 2026. In this article:

Caffeine and Dementia Risk

Study Finds that Cannabis May Be Less Effective for Chronic Nerve Pain

Omega-3 Fish Oil Shows Promise Against Type 2 Diabetes

Can You Keep Your Telomeres Long?

Pleo Muc eyedrops for Dry Eye – BACK IN STOCK

Suggested Supplements Consider

Caffeine and Dementia Risk

Research linked daily moderate consumption of caffeinated coffee or tea to an 18% lower risk of dementia. ¹ A major JAMA study followed more than 131,000 adults for as long as 43 years, which gives this research weight. The researchers looked at coffee, tea, dementia risk, and cognitive function. They found that people who drank more caffeinated coffee had a lower risk of dementia and were less likely to report subjective cognitive decline. Caffeinated tea showed similar favorable associations, while decaffeinated coffee did not show the same connection.

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Glucosamine sulfate is one of the most popular supplements taken for joint support. More than 40 million Americans take this compound daily for stiff joints and pain associated with osteoarthritis. Eight percent of seniors report taking glucosamine, making people ages 60 and up the biggest market for this supplement. What does the research show about its effectiveness and potential side effects? In this article, we discuss these questions, and reveal a 2026 study that links accelerated dementia in glucosamine supplement users who already showed signs of dementia.

Glucosamine Studies

Glucosamine sulfate is primarily studied for its potential to relieve osteoarthritis (OA) symptoms, especially in the knees. Research also looks at its role as a potential cartilage-preserving agent, particularly in relation to osteoarthritis management.
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Vitamin C is best known for immune support, but its role in healthy aging is broader than that. Ascorbic acid, the chemical name for Vitamin C, helps the body make collagen, supports blood vessel integrity, assists wound healing, improves the absorption of iron from plant foods, and acts as an antioxidant. These functions matter throughout the body, including in the brain and eyes.

A recent large study of older adults adds another reason to pay attention to vitamin C status. Researchers found that lower plasma vitamin C levels were associated with lower gray matter volume and weaker connectivity in a major brain network involved in memory, attention, and self-reflection. The study does not prove that vitamin C prevents brain shrinkage or cognitive decline. However, it does suggest that healthy vitamin C levels may be one marker of better brain aging. ¹
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