Vitamin D is one of the essentials for strong bones, but what many may not know is that its impact on immune system is also as important.

But, could it also play a role in lowering your risk of contracting or developing severe COVID-19?

How vitamin D helps with immune system

Vitamin D regulates the body's response and reduces harmful inflammation. Research has proven that it enhances the function of T cells and macrophages—immune cells. These cells are known to combat pathogens effectively.

Low vitamin D levels are also linked to an increased susceptibility to respiratory infections like tuberculosis, asthma, and chronic obstructive pulmonary disease (COPD). Whereas sufficient vitamin D is known to promote a better lung health.

A study that analyzed 11,321 participants across 14 countries showed that supplementing with vitamin D reduced the risk of acute respiratory infections by 12%, with the most significant benefit seen in those who were deficient.

So, will it also work and protect against COVID-19?

Reducing Respiratory Risks: Vitamin D supplementation is known to bolster immune defense, which could mitigate the severity of respiratory infections, including those caused by SARS-CoV-2.

Cytokine Storm Prevention: Vitamin D may help regulate cytokine activity. These are proteins that are essential for the immune system. A "cytokine storm," that happens due to excessive pro-inflammatory cytokine release, is a hallmark of severe COVID-19. It is seen and has been analyzed in studies that those with COVID-19 produce these proteins that lead to a "cytokine storm", which is immune system's natural response. This has also been seen in complications like acute respiratory distress syndrome (ARDS). Studies have found that vitamin D deficiency could exacerbate these immune responses, while supplementation might help counter them.

At this point, there are clincal trials, which are investigating the effects of vitamin D supplementation (dosages up to 200,000 IU) in people with COVID-19.

Who’s Most at Risk of Vitamin D Deficiency?

Vitamin D deficiency is widespread, especially among:

• Older adults are most vulnerable to severe COVID-19 outcomes.
• People who are not often exposed to sun, or people with darker complexion, as their body produces less vitamin D naturally.
• Those who are overweight or have issues with weight management may also have the risk of being vitamin D deficient, as it throws off the body's natural vitamin D metabolism.

What is healthy and what is not?

Too much or too little of anything is not good for your health. Thus, there are levels of how much vitamin D should one maintain. Maintaining vitamin D levels between 30–60 ng/mL is ideal for immune health, and is accepted by most healthcare professionals too. For many, a daily dose of 1,000–4,000 IU is sufficient, but individuals with deficiencies may require higher amounts under medical supervision.

Supplementation, when combined with other preventive measures like vaccination, proper hygiene, and mask-wearing, can enhance overall immunity.

Best Sources of Vitamin D

As per the British Heart Foundation: The best food sources of vitamin D are oily fish, including salmon, mackerel, and sardines. Other sources include egg yolks, red meat, and liver. Vitamin D is added to some foods too, including breakfast cereals, plant milks and fat spreads. Check information on-pack to see if this applies to the products you buy.

Hair loss in men is often blamed on genetics, age, or stress. But as lifestyle-linked health problems grow, doctors are taking a closer look at everyday dietary habits, including the regular consumption of sugar-sweetened beverages. While these drinks are not a direct cause of baldness, emerging evidence suggests they may quietly worsen hair loss in men who are already genetically predisposed.

“Hair loss is rarely caused by a single factor,” says Dr. Vineet Malhotra, Head of Urology and Director at VNA Hospital. “But excessive sugar intake can act as an important trigger, especially in men prone to androgenetic alopecia.”

How Sugary Drinks Disrupt Hormones Linked to Hair Loss

Sugar-sweetened beverages such as sodas, packaged fruit juices, energy drinks, and sweetened teas cause a rapid spike in blood glucose levels. To manage this surge, the body releases insulin. When this happens repeatedly over time, it can lead to insulin resistance.

“Chronic insulin resistance is known to disturb hormonal balance,” explains Dr. Malhotra. “It can increase circulating androgens and speed up the conversion of testosterone into dihydrotestosterone, or DHT.”

DHT is the hormone most strongly associated with male pattern baldness. Higher levels of DHT cause hair follicles to shrink, shorten the hair growth cycle, and gradually turn thick hair into finer, weaker strands.

The Inflammation Link: Why the Scalp Suffers

High sugar intake is also closely tied to low-grade systemic inflammation. While this inflammation may not be immediately noticeable, it affects blood vessels throughout the body, including the tiny capillaries that supply oxygen and nutrients to hair follicles.

“When microcirculation is compromised, follicles do not receive adequate nourishment,” says Dr. Malhotra. “This can slow hair growth and increase hair shedding.”

Read: South Korean President Says Baldness Is The 'New Enemy'; Wants Insurance To Cover Hair Loss Treatment

Inflammation can also push hair follicles out of the growth phase and into the resting phase prematurely. The result is often diffuse thinning rather than patchy bald spots, something many men notice before visible hair loss becomes obvious.

Metabolic Health, Gut Health, and Nutrient Deficiencies

Frequent consumption of sugary drinks is linked to weight gain, fatty liver, and metabolic syndrome, all of which can disrupt hormonal balance. Poor metabolic health can alter cortisol levels and insulin-like growth factors, both of which influence how hair follicles function.

Equally important is what high-sugar diets tend to replace. “Men who consume a lot of sugary drinks often miss out on nutrient-dense foods,” Dr. Malhotra notes. This increases the risk of deficiencies in zinc, iron, biotin, protein, and other nutrients essential for healthy hair structure and growth.

What Studies Are Showing So Far

Recent observational studies have found a higher prevalence of early-onset hair loss in young men who consume sugar-sweetened beverages daily compared to those who drink them occasionally. While these studies do not prove a direct cause-and-effect relationship, the association is strong enough to raise concern.

“The impact appears more pronounced in men with a family history of baldness,” says Dr. Malhotra. “In such cases, diet may accelerate hair loss rather than initiate it.”

Sugar Is Not the Only Culprit, But It Matters

It is important to note that sugary drinks alone do not cause hair loss. However, when combined with genetic susceptibility, high stress, poor sleep, smoking, and physical inactivity, excessive sugar intake can significantly worsen scalp health and hair thinning.

Reducing sugar-sweetened beverages, improving overall diet quality, maintaining stable blood sugar levels, and supporting metabolic health may help slow hair loss and promote healthier hair over time.

Why Doctors Are Now Asking About Diet

In clinical practice, men presenting with unexplained or rapidly worsening hair loss are increasingly being asked about their dietary habits, alongside hormonal and nutritional evaluations.

“Cutting back on sugar-sweetened drinks benefits the heart and metabolism,” Dr. Malhotra says. “But it may also offer long-term support for hair health, especially in men at risk of early hair loss.”

While genetics may set the stage, everyday choices often decide how quickly the story unfolds.

Soup debate between chicken and tomato may have come to an end, with a dietitian telling us which one is the healthier option. For many Americans, January is the National Soup Month, which means they go back to their comfort and easy to make food like soup. With the surge in flu activity in the US, people are consuming soup to get relief. Amid all this, Vandana Sheth, a plant-based dietitian and a diabetes expert tells Fox News the better option. The California-based dietitian says that both soups could be comforting. However, she points out, the nutrition profiles could vary based on the preparation.

Chicken Soup Vs Tomato Soup

Soup's nutrition profile runs through a spectrum of healthy to fatty and caloric. "Choose versions with no added sugars, minimal saturated fat and lower sodium to keep them healthy. When able, enjoy homemade or minimally processed options with fresh vegetables, lean protein and other fiber-rich options," she said.

Also Read: NHS England Expands Access To Life Saving Prostate Cancer Drug

What Is In A Chicken Soup?

Michelle Routhenstein, a New York-based cardiologist, as reported by Fox News, said a standard serving size of chicken noodle soup, which is around one cup, usually contains somewhere around 100 to 150 calories, with 6 to 10 grams of protein, and 500 to more than 1500 milligrams of sodium.

However, Routhenstein also says that homemade chicken soup could also provide lean protein, B vitamins, and immune supporting zinc. There have been studies that show that chicken soup have eased many from their cold symptoms, like nasal congestion and anti-inflammatory effects. However, not all chicken soups are safe. Commercially prepared soups may have a higher level in sodium, which could have a negative impact on blood pressure.

What Should One Keep In Mind?

When buying chicken soup, one should always check labels for its sodium content and ensure it must be under 500 milligrams per servings. Sheth also suggests looking out for added sugars and flavors. Sheth also said if the soup is made with lean chicken, vegetables and has a light broth, it can by more nutrient rich. She also recommends to avoid cream-based broth, which could be higher in saturated fat.

What Is In A Tomato Soup?

Tomato soups have a completely different nutrition profile. "Per 1 cup serving, you will get 70–150 calories depending on [whether] it's broth-based or cream-based, lycopene and vitamins A and C, which can help support eye health and immunity," Sheth said. The sodium content could be lower than in chicken soup, somewhere between 400 to 900 milligrams, especially in canned versions.

Sheth said that when compared to chicken soup, tomato soup trails on protein scale. While Routhenstein highlighted lycopene, as one of the biggest benefits of tomato soup. It is an antioxidant that "may help with reducing inflammation, heart disease and immune health".

"Lycopene has also been studied for its benefit [in reducing the] risk of prostate cancer. Tomato soup is also rich in vitamin C and potassium, which also protect heart and immune health," she added.

Which Soup Is Better?

Routhenstein says for her, it is tomato soup, because of antioxidant content. However, when it comes to protein and keeping you full, Sheth says chicken soup is a better option.

A key ingredient found in a common breakfast food may play an important role in supporting heart health and keeping blood sugar levels steady. Fibre is an essential part of a balanced diet, and the NHS recommends that adults aim for at least 30g of fibre each day. Despite this, many people still fall short of the daily target, often without realising the long-term impact on their health.

Why Fibre Matters For Heart And Blood Sugar Health

Fibre is not a single substance. It exists in two main forms, and each affects the body in a different way. Insoluble fibre does not dissolve during digestion. Instead, it passes through the gut largely unchanged, adding bulk to stools and helping the bowels move regularly. This can lower the risk of constipation and reduce the chances of developing intestinal blockages.

How Soluble Fibre Helps Control Blood Sugar Levels

Soluble fibre behaves differently. When it comes into contact with water in the digestive system, it forms a gel-like substance. This slows the digestion and absorption of carbohydrates, helping to prevent sudden rises in blood sugar after meals. Because of this effect, soluble fibre can be particularly useful for people managing blood sugar conditions, including diabetes.

What Makes Beta-Glucan Especially Good For The Heart?

Beta-glucans are a specific type of soluble fibre that have attracted attention for their heart-protective benefits. According to the British Heart Foundation, beta-glucan is naturally present in all porridge oats and wholegrains. A standard 40g serving of porridge oats contains around 2g of beta-glucan, making it an easy addition to a heart-friendly diet.

Research suggests that beta-glucan may help improve blood sugar control over time. Studies have found that consuming up to 3.5g of beta-glucan daily can lower blood sugar levels and support better long-term glucose management in people with type 2 diabetes. A higher intake of beta-glucan has also been linked to a reduced risk of developing type 2 diabetes, likely due to its ability to slow sugar absorption.

Beta-Glucan And Its Link To Lower Cholesterol

Another study has highlighted the connection between regular beta-glucan intake and improved heart health. The findings showed that eating just 3g of beta-glucan each day for eight weeks led to a noticeable reduction in cholesterol levels. High cholesterol is a well-known risk factor for heart disease, so even small daily amounts of beta-glucan may offer meaningful benefits.

Sources Of Beta-Glucan

Beta-glucan is found in a wide range of natural foods, including:

• Oats
• Rye
• Shiitake mushrooms
• Peas
• Seaweed
• Yeast
• Reishi mushrooms
• Apples
• Algae
• Barley
• Wheat

Including a variety of these foods in meals can help increase fibre intake in a balanced way.

Possible Side Effects Of Increasing Fibre Intake

As beta-glucan is a form of fibre, increasing intake too quickly can cause mild digestive discomfort. Some people may experience bloating, wind, or constipation, especially in the early stages. These symptoms can often be reduced by staying physically active and drinking enough fluids throughout the day.

If you are concerned about how fibre affects your body, it is advisable to speak with your GP or a qualified health professional. They can offer guidance tailored to your needs. More information on increasing fibre intake and its health benefits is also available on the NHS website.