When cold season starts, zinc is one of the first supplements people reach for. One of the best-selling options on Amazon is a 50 mg caplet that lists 455% of the Daily Value on its label. That sounds impressive, but a big percentage is not the same as a better dose. Here’s how that number … Read more
Electrolyte powder has moved from the gym bag to the kitchen counter. People stir it into water after a run, on a hot day, or just because it tastes better than plain water. Whether you need it depends on how much you sweat and what the packet adds to your day. Here’s when electrolyte powder … Read more
The Amazon listing for one popular Akkermansia capsule says it “Increases GLP-1 Production.” It’s a bold line, especially now that GLP-1 drugs are everywhere. But the human trials behind Akkermansia tell a narrower story, and the details matter if you’re deciding whether a $2-a-day capsule belongs in your routine. This article is for general informational … Read more
There’s one number you see on turmeric supplement bottles and in ads again and again: black pepper makes curcumin absorb 2,000% better. It’s repeated so often that it feels like settled science. The original study is from 1998, though, and a newer independent trial found that adding the same black pepper compound did not help. … Read more
Two L-theanine bottles sit side by side on Amazon. Both list 200 mg. One costs $0.50 a capsule, the other $0.07. So what are you paying for? That gap is real. On a single Amazon listing in late September 2026, L-theanine products ranged from about $0.07 to $0.96 per capsule. Some of the more expensive … Read more
Take a nicotinamide riboside supplement for eight weeks and your blood NAD+ level can climb by as much as 142%. That number is real, measured, and repeated across multiple clinical trials. What’s less clear is whether a higher number on a lab readout means you’ll actually feel, move, or age any differently. This post contains … Read more
A warning label going bigger on a bottle doesn’t always mean the science behind it is solid. Case in point: the fish oil warning that tells you to check with your doctor if you’re allergic to iodine or taking blood thinners. One half of that warning is genuinely worth paying attention to. The other half … Read more
In May, biohacker Bryan Johnson announced he’d been diagnosed with autoimmune gastritis — a condition that stops his stomach from doing the two things it needs to do to absorb vitamin B12 normally. That’s a strange twist for someone whose supplement company sells a multivitamin built around, among other things, a very large dose of … Read more
Probiotic labels love to compete on one number: CFU count. But NIH’s own guidance says that number isn’t what determines whether a probiotic actually works — the specific strain is. Here’s what actually matters when you’re comparing two bottles on a shelf. This post contains affiliate links. If you make a purchase through them, we … Read more
Magnesium oils and lotions are marketed as a way to get magnesium into your body without swallowing a pill. A peer-reviewed review of the science reached a blunt conclusion: the evidence for that claim is scientifically unsupported. Here’s what the research actually found, and whether that changes anything for the leg cramps or muscle aches … Read more