Elizabeth Borelli
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March 11, 2026

Walk into any health food store and you’ll find shelves stacked with capsules, powders and tinctures promising sharper thinking, stronger immunity, better sleep and less inflammation. Americans spend tens of billions of dollars a year on dietary supplements, often hoping for a simple shortcut to better health.
But the science behind many of the most popular products is surprisingly thin.
That doesn’t mean these plants or compounds are useless—many come from traditional herbal systems and may have subtle benefits. The problem is that the bold claims printed on supplement bottles often outpace the research supporting them. And in some cases, the most effective versions of these ingredients are simply the ones found in everyday foods.
Here are seven widely marketed supplements that experts say may not be worth the price tag.
Functional mushrooms have exploded in popularity in recent years. And I was a hardcore believer. Until I a chance meeting with Gordon Walker, Ph.D. Biochemistry, Molecular, Cellular and Developmental Biology, aka Dr. Fun Guy at a press event. I asked him about the healing benefits of powders and capsules made from varieties like Reishi, Lion’s Mane and Turkey Tail promise everything from immune support to sharper brain function.
These mushrooms do contain interesting compounds, including beta-glucans and other polysaccharides that may influence immune activity, but the plethora of research has yet to prove whether a mushroom capsule will actually deliver noticeable health benefits.
In other words, the marketing has raced far ahead of the evidence. If you enjoy mushrooms in your meals, great—they’re nutritious foods. But expensive powders promising dramatic effects may not live up to the hype.
The golden spice Turmeric has been celebrated for centuries in traditional cooking and medicine, and it’s true that curcumin—its main active compound—has anti-inflammatory properties. Another chance encounter with a medical professional at a yoga retreat prompted me to second guess my belief in the health benefits of this trendy “superfood”.
The supplement industry has turned turmeric into a massive business, selling concentrated capsules designed to deliver high doses of curcumin.
But here’s the catch: curcumin is poorly absorbed by the body. Many supplements add black pepper extract or other compounds to try to improve absorption, but research results are still mixed. For most people, using turmeric regularly in cooking—think curries, soups and roasted vegetables—may provide just as much benefit as popping an expensive pill.
Few supplements have generated as much buzz in recent years as Cannabidiol, commonly known as CBD.
Derived from hemp, CBD is marketed as a natural solution for anxiety, pain, sleep problems and inflammation. While some early studies suggest it may help with certain medical conditions, the evidence for many everyday wellness claims remains limited.
Another issue is quality control. Because the CBD market grew so quickly, studies have found that some products contain far less—or far more—CBD than their labels claim. Until research and regulation catch up, consumers may want to approach the trend with caution.
For decades, the herbal supplement Ginkgo biloba has been promoted as a memory booster.
The idea sounds appealing: take a daily capsule and improve circulation to the brain, potentially protecting against age-related cognitive decline. But large studies examining ginkgo’s effects on memory and dementia prevention have produced inconsistent results.
Some people report feeling sharper when taking it, but overall, the scientific consensus suggests ginkgo is unlikely to provide the dramatic brain boost that marketing often promises.
The herbal remedy Echinacea has long been associated with immune support, especially when cold season arrives.
Many people start taking echinacea at the first sign of a sniffle, hoping it will shorten the duration of illness. But research results are mixed. Some studies show modest effects, while others find no significant difference compared to a placebo.
It’s not necessarily harmful, but it may not be the cold-fighting miracle the supplement aisle suggests.
Drinking green tea is widely associated with health benefits, thanks to its rich supply of antioxidants. But capsules containing concentrated Epigallocatechin gallate—often marketed as green tea extract—promise something more dramatic: weight loss and faster metabolism.
Unfortunately, the research supporting those claims is weak. While green tea itself can be a healthy beverage, high-dose extracts haven’t consistently produced meaningful weight-loss results. In some cases, concentrated extracts have even been linked to liver problems when taken in large amounts.
The safest bet may simply be enjoying a cup of green tea.
Perhaps the most controversial category on supplement shelves is Homeopathy.
Homeopathic remedies are based on the principle that extremely diluted substances can stimulate the body’s healing response. The dilution process is so extreme that many products contain little or no measurable amount of the original ingredient.
Large scientific reviews have repeatedly found no convincing evidence that homeopathic remedies work beyond placebo effects. Yet they remain widely available in pharmacies and health stores.
None of this means supplements are useless. Certain vitamins and minerals—like vitamin D, B12 or iron—can be important when deficiencies exist. But the booming wellness marketplace often encourages people to chase health in a bottle rather than focusing on proven foundations.
Regular movement, balanced meals, quality sleep and social connection remain some of the most powerful predictors of long-term well-being.
In other words, the simplest strategies are often the most effective—and the least expensive.
Before adding another supplement to your routine, it may be worth asking a simple question: could the same investment be better spent on fresh food, a yoga class or a walk along the coast?
Sometimes the best health upgrade isn’t found in a capsule at all.
