Vegan Diet (Credit: Canva)
Vegan diets are a plant-based nutrition programme, which involves eating solely plant-based foods such as vegetables, fruits, nuts, seeds and whole grains. Following this kind of diet means refraining from all types of animal products like eggs, dairy, meats etc. Advocates of this diet across the world argue that a well-balanced vegan diet not only protects people from chronic diseases such as cancer and heart disease but also saves animals from the pain and terror of slaughter and factory conditions. A vegan diet also contributes to the environment by significantly decreasing the emission of greenhouse gasses.
A 2023 study, published in the journal Nature, elucidated how different diet types influence an individual's microbiota composition. Research indicates that there is a significantly higher diversity of gut bacteria, like Bifidobacterium and Lactobacillus, capable of breaking down fibres found in vegan and vegetarian diets compared to the bacteria needed to metabolize the fats and proteins from animal-based diets. This suggests that plant-based diets promote a more varied and beneficial gut microbiome, which can enhance digestive health and nutrient absorption. The greater abundance of fiber-digesting bacteria may also contribute to improved overall health outcomes, as these microbes are linked to better metabolic functions and reduced inflammation.
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A common vegetable has been found to help reduce blood pressure in older adults, according to a new study. Beetroot juice can lower blood pressure in people aged 60 and above by targeting certain potentially harmful bacteria in the mouth. Researchers at the University of Exeter studied how younger and older adults responded to beetroot juice, which is rich in dietary nitrates. These nitrates are converted by the body into nitric oxide, a compound that relaxes and widens blood vessels, helping to lower blood pressure.
The study included 39 adults under the age of 30 and 36 adults in their 60s and 70s. For two weeks, each group received shots of beetroot juice. After a two-week break, during which participants used antiseptic mouthwash daily, they were given a placebo juice without nitrates for another two weeks.
Researchers analyzed the bacteria in participants’ mouths using gene sequencing. In both groups, the oral microbiome—the community of microorganisms in the mouth—changed after drinking nitrate-rich juice, though the effects were different depending on age. In older adults, there was a reduction in common bacteria that can sometimes cause infections and an increase in bacteria that support health. The older participants also showed lower blood pressure after two weeks of drinking the nitrate-rich juice.
Professor Andy Jones of the University of Exeter said, “This study shows that nitrate-rich foods can change the oral microbiome in ways that may reduce inflammation and lower blood pressure in older adults. This opens the door for larger studies to examine how lifestyle factors and biological sex affect responses to dietary nitrate supplements.”
It may be possible to drink beet juice while taking blood pressure medications. However, it’s important to consult a doctor before making any changes to a treatment plan for high blood pressure.
A doctor can advise whether combining beet juice with blood pressure medication could lower blood pressure too much. If this happens, a person may experience symptoms such as:
Low blood pressure (hypotension) can be serious. If someone experiences severe symptoms that do not improve when sitting or lying down, they should seek immediate medical attention.
Eating beets may help reduce blood pressure, but most research has focused on beet juice rather than whole beets.
Currently, there isn’t enough scientific evidence to confirm that eating beets has the same effect as drinking beet juice.
If someone wants to explore dietary changes to manage their blood pressure, it’s best to consult a doctor before making adjustments.
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Protein powder lead consumer reports: Some protein powders and shakes have been found to contain unsafe amounts of lead, according to a recent Consumer Reports investigation. The report, released Tuesday, analyzed 23 protein products, including dairy, beef, and plant-based supplements and revealed that over two-thirds contained more lead per serving than what experts consider safe, which is around 0.5 micrograms a day.
With growing concern over heavy metal contamination in protein powders, it’s worth exploring healthier, safer alternatives to meet your protein needs.
“Protein powders and shakes have become incredibly popular among people looking to add more protein to their diet,” said Brian Ronholm, director of food policy at Consumer Reports, in a news release. “Our tests found that toxic heavy metal contamination in protein supplements is widespread and has worsened since we first examined these products 15 years ago.”
According to the findings, plant-based protein powders had the highest levels of lead, averaging about nine times more than dairy-based options like whey and twice as much as beef-based products.
Among the products tested, Naked Nutrition’s Vegan Mass Gainer and Huel’s Black Edition were identified as containing the highest levels of lead and were listed under “products to avoid.” The full list of tested brands is available in the report.
Andrew Mock, MD, MPH, a preventive and lifestyle medicine specialist at Loma Linda University Health and also California’s Strongest Man says the flood of protein products in the fitness market can often lead people to spend large sums on items that may not be beneficial, necessary, or even safe.
“For a non-active adult, about 0.8 grams of protein per kilogram of body weight is enough to prevent deficiency,” Mock explains. “For those who exercise regularly, the target should be 1.2 to 1.6 grams per kilogram daily. Higher amounts can be safe, but most people don’t actually need that much.”
Although protein shakes are convenient, nearly half of Americans (46%) drink them regularly Mock notes that they are not essential.
“You can easily meet your protein needs with regular food,” he says. “Protein powders and ready-to-drink shakes are helpful for busy days, but they shouldn’t be treated as dietary must-haves.”
Whole food protein sources include:
When time allows, homemade protein shakes made with natural ingredients are another safe and nutritious choice.
While supplement companies are required to register with the U.S. Food and Drug Administration (FDA), the agency doesn’t routinely test their products. This lack of regular oversight raises safety issues, including contamination.
“It’s surprisingly common for even well-known supplement brands to contain harmful ingredients,” Mock warns. “These can include heavy metals, anabolic steroids, or other banned substances. One study even found that one in eight supplements contained illicit materials.”
Contamination has been detected across various products, from protein powders and multivitamins to herbal capsules with some not even containing what their labels promise.
To reduce these risks, Mock advises checking packaging for third-party testing certifications, which confirm that a product meets strict safety standards.
“Look for labels such as the National Science Foundation (NSF) mark, or certifications like Informed for Sport and Certified for Sport,” he says. “Another key label is current Good Manufacturing Practice (cGMP), which means the supplement is produced under proper safety and hygiene conditions monitored by the FDA.”
These certifications offer a level of reassurance that a supplement has been independently tested and verified. By checking for them, consumers can make smarter and safer choices when buying protein powders or other health products.
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Consumer Reports Protein Powder: The Consumer Reports Protein Powder Investigation, titled 'Protein Powders and Shakes Contain High Levels of Lead', revealed, as the name suggests that some of the most popular and widely known protein powder were found with leads and other metal contents. The report was published on Tuesday, which analyzed 23 protein powder and shakes. The range included dairy, beef and plant-based protein supplements. The analysis found that more than two-thirds of the products contained more lead in a single serving than what experts consider to be safe, around 0.5 micrograms per day.
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Brian Ronholm, director of food policy at Consumer Reports in a news release said, "Protein powders and shakes have become immensely popular and are part of a daily routine for many people who are focused on consuming more protein in their diet. Protein powders and shakes have become immensely popular and are part of a daily routine for many people who are focused on consuming more protein in their diet."
On average, the lead levels in plant-based products were the highest. The report revealed that it was nine times the amount found in dairy-based proteins, like whey. When compared to beef-based products, the plant-based powders had twice as much lead in it.
The Consumer Reports also published a list of products to avoid, among them, at the top were two plant-based protein powders by the brand Naked Nutrition Vegan Mass Gainer and Huel Black Edition. The former one contained 1,572% more lead than the level approved, while the latter one contained 1,288% over the approved level. The Consumer Report suggested that these powders should not be consumed at all, while for other products, it did provide the servings per week limit.
The categories are:
The Consumer Reports provided that Muscle Tech Mass Gainer showed no lead in its product, thus no limit was placed on it.
The Consumer Reports in its report writes that they purchased multiple samples of each product, including two to four distinct lots, over a three-month period beginning last November. These products were brought anonymously from online retailers and food stores. The samples from multiple lot were tested for levels of protein, arsenic, cadmium, lead, and other elements. However the report notes: "the results are based on an average of these samples, which were collected over a specific period of time, they may not mirror current contaminant levels in every product. Even so, the findings highlight why consumers should carefully consider the role of protein powders and shakes in their diet."
7 of the 23 companies did not respond for comments, but those who responded said that lead is a naturally occurring element that is difficult to avoid, especially in plant-based products. Eight companies, namely: Equip Foods, Garden of Life, KOS, Momentous, Muscle Meds, Muscle Tech, Orgain, and Vega, said they test both their ingredients and finished products for heavy metals.
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