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The NAD+ Supplement Everyone Is Taking Doesn’t Work the Way Influencers Claim. A COVID Drug Prevents Infection. And a Plant Just Revealed It Uses the Same Math as City Planners.
A reality check on one of the most hyped supplements of 2026, a clinical trial result for COVID prevention, and a finding from nature that nobody was expecting.
NAD+ Supplements: The Science Is Real, the Marketing Has Run Way Ahead of It
NAD+ — nicotinamide adenine dinucleotide — is a molecule involved in cellular energy production and DNA repair. It declines with age. And it has become one of the most aggressively marketed longevity supplements in the wellness industry, with products claiming to reverse aging, restore energy, and extend lifespan. NPR this week reported that experts say the marketing claims have run significantly ahead of what the science actually shows.
The research interest in NAD+ is legitimate — preclinical studies in animals have shown significant effects, and the biology is sound. But translating that to humans is where the evidence becomes much thinner. Oral NAD+ precursors like NMN and NR do raise NAD+ levels in the blood. Whether those elevated blood levels translate into meaningful benefits in human tissue and cellular function at the doses available in supplements is much less established than the product labels suggest. The FDA is also reviewing whether these compounds can remain in supplements at all, with one possible outcome being tighter regulation.
The practical reality: NAD+ precursors are not dangerous at typical supplement doses. But the specific anti-aging and longevity effects being marketed are not supported by human clinical trial evidence at the level the industry implies. If you’re taking them, you’re probably not being harmed. You are, however, likely spending significantly more than the evidence justifies.
A COVID Antiviral Can Now Prevent Infection — Not Just Treat It
A Phase III randomized controlled trial published this week found that ensitrelvir — an antiviral developed by Shionogi — prevents COVID-19 infection in household contacts of confirmed cases when given within 72 hours of the index patient’s symptom onset. This is a meaningful shift in how antivirals can be used: not just to treat people who are already sick, but to stop infection from occurring in people who have been exposed.
Post-exposure prophylaxis — preventing disease after a known exposure — is already established for HIV and some other viruses. Applying it to COVID changes the practical calculus for households with vulnerable members: elderly relatives, people who are immunocompromised, or those for whom COVID carries elevated risk. The drug is currently approved in Japan and under regulatory review in other markets. It is not yet available in the U.S., but the trial results will accelerate that timeline.
A Houseplant Is Using the Same Geometry as City Planners — and Scientists Just Noticed
Scientists mapping the internal structure of the Chinese money plant discovered that its leaf tissue is organized using Voronoi diagrams — a geometric pattern in which space is divided into regions based on proximity to a set of points, such that every location within a region is closer to its central point than to any other. This pattern is used by urban planners to organize service areas, by engineers to design load-bearing structures, and by computer scientists in network design. It shows up in giraffe coat patterns, dragonfly wings, and the structure of soap bubbles.
The finding is more than a curiosity. It suggests that the Chinese money plant has independently evolved a near-optimal geometric solution to the problem of distributing resources across a leaf surface — one that mathematicians arrived at through formal proofs and that engineers use in structural design. Nature, it turns out, has been solving the same optimization problems that humans formalize through mathematics — and in many cases reached the same answers millions of years earlier.
The Week Ahead→ Nvidia earnings Wednesday May 20 — $78.5B expected, 77% year-over-year growth. The most watched report of the quarter. History: Nvidia has risen after every first-quarter report in recent years→ SpaceX IPO filing expected this week — projected at $1.75 trillion, which would make it the largest public offering in U.S. history. Prospectus expected before Wednesday→ Iran: Strait of Hormuz reopening timeline — China committed to facilitating reopening after the Beijing summit. Energy markets are watching for concrete signals this week. Gas prices at the pump follow oil moves by 2–3 weeks→ Retail earnings week — Walmart, Home Depot, and Target all report this week. Their results will give the clearest picture yet of how American consumers are absorbing 3.8% inflation in their actual spending behavior
Sources: NPR · ScienceDaily May 14, 2026 · Medical Xpress · Motley Fool · CNBC
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