Does Vitamin D Really Prevent Everything It's Marketed For?
Verdict IT DEPENDS
01 Nutrition
Is Coffee Actually Good for You Now?
Coffee has been called both a health risk and a health food. We trace why the headlines kept flipping and where the evidence has cautiously settled.
- The claim
- Is Coffee Actually Good for You Now.
- The verdict
- IT DEPENDS
Today’s verdicts
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02Supplements -
01Nutrition Is Gluten Bad for People Without Celiac Disease? What the Evidence Says
Verdict IT DEPENDS
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04Myths & Facts Are "Superfoods" Actually Super, or Just Marketing?
Verdict MYTH
Latest
The full index- 02Supplements
Does Vitamin D Really Prevent Everything It's Marketed For?
Vitamin D does a few specific things well. The longer list of diseases it was supposed to prevent did not hold up when the large trials finally ran.
- 01Nutrition
Is Gluten Bad for People Without Celiac Disease? What the Evidence Says
Gluten-free diets have spread far beyond celiac disease. We explain what controlled trials actually show about non-celiac gluten sensitivity and where the placebo signal is strong.
- 04Myths & Facts
Are "Superfoods" Actually Super, or Just Marketing?
The word superfood has no scientific or regulatory meaning. We trace how a marketing label ended up on everything from blueberries to cacao, and what the evidence actually supports.
- 03Hydration
Do "Detox" Drinks and Cleanses Actually Flush Toxins?
Detox drinks promise to flush toxins, but your liver and kidneys already do that job. We explain what detox really means and the risks of extreme cleanses.
- 02Supplements
Best Electrolyte Supplements in 2026: An Evidence-Based Ranking
Five electrolyte powders ranked against what the evidence actually says about absorption, the sodium-potassium ratio, ingredient red flags, and label transparency.
- 01Nutrition
Does Lemon Water First Thing in the Morning Do Anything?
Lemon water is sold as a morning ritual that detoxes, alkalizes, and boosts metabolism. We check what the hydration and the vitamin C actually deliver.
- 04Myths & Facts
Does Apple Cider Vinegar Actually Do Anything for Your Health?
Apple cider vinegar has a long list of wellness claims attached to it. We separate the small, measurable effects from the much larger marketing halo.
- 03Hydration
Can You Really Be Dehydrated Without Feeling Thirsty?
Is thirst too late a signal? We examine how thirst regulation works, the subtler signs of dehydration, and who is most at risk of missing them.
- 02Supplements
Are "Natural" Supplements Automatically Safe?
The word natural is reassuring, but it says nothing about safety, dose, or interactions. We explain why, and how to vet a supplement sensibly.
- 01Nutrition
Is Intermittent Fasting Better Than Just Eating Less?
Head-to-head trials keep landing in the same place: when calories are matched, fasting schedules do not clearly beat plain calorie restriction.
- 04Myths & Facts
Does Sugar Make Kids Hyperactive?
One of the most-tested beliefs in nutrition. We look at the blind-test studies, why parents still see a sugar buzz, and what's really going on at the party.
- 03Hydration
Is Coconut Water a Superior Sports Drink?
Coconut water is marketed as nature's sports drink. We compare the marketing to its actual electrolyte profile and where plain water wins.
- 02Supplements
Collagen Supplements: Do They Do Anything for Skin and Joints?
Collagen supplements are booming. We check the trend against what's actually been measured for skin and joints, and where claims outrun evidence.
- 01Nutrition
Is Red Meat Bad for You? Sorting Signal From Headline
Red meat headlines can sound alarming. We read past them to the actual size of the risk and what "moderation" really means.
- 04Myths & Facts
Is Sitting Really "The New Smoking"?
A viral comparison examined for what's fair and what's overblown. We weigh the sitting research, the strained smoking analogy, and the useful takeaway.
- 03Hydration
Does Drinking Water Help You Lose Weight?
Water is often sold as a weight-loss tool. We take a measured look at appetite, metabolism, and where the water-for-weight claim is oversold.
- 02Supplements
Is Magnesium the Answer to Better Sleep?
Magnesium has become a go-to sleep aid online. We weigh the buzz against a fairly thin evidence base and look at food sources versus pills.
- 01Nutrition
Does Eating Late at Night Make You Gain Weight?
The late-eating debate is really a question about timing versus total intake. We separate the clock from the calories and explain what drives the effect.
- 04Myths & Facts
Do We Only Use 10% of Our Brains?
A stubborn pop-science myth, debunked with basic neuroscience. We trace where it started, what brain imaging shows, and why it refuses to die.
- 03Hydration
Do You Really Need 8 Glasses of Water a Day?
The 8x8 rule is everywhere, but its origins are murky. We track down where it came from and what hydration guidance actually says.
- 02Supplements
Do You Really Need a Daily Multivitamin?
We look at who plausibly benefits from a daily multivitamin, who probably doesn't, and what the data says about the popular insurance-policy idea.
- 01Nutrition
Is "Natural" Sugar Better Than Refined Sugar?
Honey, maple, and other natural sweeteners carry a health halo. We test that halo against how the body actually handles different sugars.
- 04Myths & Facts
Does Going Outside With Wet Hair Make You Sick?
A grandmother-approved myth, examined. We separate viruses from cold air and explain why colds really rise in winter, and the grain of truth involved.
- 02Supplements
Does Vitamin C Actually Prevent Colds?
The belief that vitamin C wards off colds is decades old. We revisit it against the trial evidence and the key difference between prevention and duration.
- 01Nutrition
Are Eggs Bad for Your Cholesterol? What the Evidence Now Says
Egg advice has flipped over the decades. We explain the difference between dietary and blood cholesterol and where the science has settled.
- 04Myths & Facts
Will Cracking Your Knuckles Give You Arthritis?
A classic warning, checked against surprisingly clear evidence. We explain what the cracking sound is and what the research actually found.
- 01Nutrition
Is Breakfast Really the Most Important Meal of the Day?
We trace the famous breakfast slogan back to its roots and weigh what the evidence actually supports about the morning meal.
Sections
- Nutrition What the research actually says about food, diets, and eating well. 9 explainers
- Supplements Clear-eyed reviews of what works, what's hype, and what to skip. 7 explainers
- Hydration Fluids, electrolytes, and the evidence behind staying hydrated. 5 explainers
- Myths & Facts Debunking wellness claims and separating real science from marketing. 7 explainers
Standards & corrections. Wellness Explained is an independent publication. Every explainer is reviewed against primary sources and written to answer a single question plainly. Our articles are general information, not medical advice — consult a qualified clinician about your individual circumstances. Spotted an error? Write to corrections@wellnessexplained.org.