Tech
Do You Need A DEXA BD/BC Scan?
For most people, though, “if results are strong, maybe you don’t need another scan for five years,” says Wagner. “If they’re lower, lifestyle interventions can help, and you may want to recheck in a year.”
Radiation exposure is negligible, less than a chest x-ray. But the psychological impact can be more complicated. For some, the numbers motivate: “When I did a body composition test at 36, I had way more body fat than I expected,” Cheema says. “That pushed me to change my workouts and eating patterns in ways that improved my health—something BMI alone wouldn’t have prompted.”
For others, especially those with histories of disordered eating or body image issues, it can be destabilizing and overwhelming. Numbers can become another metric to obsess over rather than a tool for health. “It can be overwhelming if you don’t have a clinician to interpret the results,” Gidwani says. “That’s why I review all of my patients’ scans with them.”
Cheema agrees: “Too much detail without guidance risks overwhelming people with information that isn’t clinically actionable.”
“I don’t think DEXA gives too much information compared to, say, a whole-body MRI, which can reveal incidental findings that can cause anxiety and lead to unnecessary interventions,” says Gidwani. “Its data points are actionable: decrease body fat, reduce visceral fat, increase muscle.”
Experts emphasize that actionability is key. “The most important metrics are visceral adipose tissue and total body fat percentage, especially when tracked over time,” Cheema says. “But DEXA also breaks things down by arms, legs, trunk, etc. That can veer into aesthetics rather than health.
Should You Get One?
If you’re 65 or older, or at risk for osteoporosis, your doctor may already recommend a DEXA scan for bone health. For women in perimenopause, when bone density can drop by as much as 20 percent, an early baseline scan could flag risks years before they become urgent.
DEXA also detects sarcopenic obesity, where muscle loss occurs alongside high body fat. “Someone may look normal weight on a scale, but a DEXA can reveal poor muscle-to-fat balance,” Gidwani says.
Beyond those groups, the use case narrows. Athletes, bodybuilders, and people on GLP-1 medications may find the data genuinely useful. For generally healthy adults who exercise, eat decently, and check in with a doctor, many clinicians are indifferent.
“For a healthy individual, I wouldn’t universally recommend it,” Cheema says. “Lifestyle changes and basic care may matter more than getting a DEXA.” There are alternatives—bioimpedance scales, Bod Pods, and AI-enabled wearables—but none are as accurate as DEXA. For now, it remains the most precise, if expensive, tool available.
Final Takeaways
My DEXA results were somewhat humbling. Despite near-daily workouts and a decent diet, the scan flagged more body fat than I expected and the beginnings of osteopenia in my spine. The bright side was an “excellent” visceral fat score, something I’ll be bragging about indefinitely.
Catching early bone loss feels actionable; I can tweak my workouts to prioritize strength and mobility. But the body fat percentages have lived in my brain rent-free ever since, without offering much in return. I don’t plan to shell out a few hundred dollars for another scan anytime soon, so I may never know if my adjustments are actually working.
That’s the paradox of DEXA. For those with medical risks, it can be invaluable. For athletes chasing marginal gains, it’s another knob to turn. But for the rest of us, it’s a reminder that data is only as useful as what you’re willing or able to do with it. In the end, DEXA doesn’t promise longevity so much as it promises numbers, and numbers alone don’t add years to your life.
Meet the Experts
- Jennifer Wagner, MD, MS, chief health and performance officer, Canyon Ranch in Tucson, Arizona.
- Josh Cheema, MD, medical director of Northwestern Medicine Human Longevity Clinic in Chicago, Illinois.
- Pooja Gidwani, MD, MBA, board-certified physician in internal medicine and obesity medicine in Los Angeles, California.
Tech
Netflix Says if the HBO Merger Makes It Too Expensive, You Can Always Cancel
There is concern that subscribers might be negatively affected if Netflix acquires Warner Bros. Discovery’s streaming and movie studios businesses. One of the biggest fears is that the merger would lead to higher prices due to less competition for Netflix.
During a US Senate hearing Tuesday, Netflix co-CEO Ted Sarandos suggested that the merger would have an opposite effect.
Sarandos was speaking at a hearing held by the US Senate Judiciary Committee’s Subcommittee on Antitrust, Competition Policy, and Consumer Rights, “Examining the Competitive Impact of the Proposed Netflix-Warner Brothers Transaction.”
Sarandos aimed to convince the subcommittee that Netflix wouldn’t become a monopoly in streaming or in movie and TV production if regulators allowed its acquisition to close. Netflix is the largest subscription video-on-demand provider by subscribers (301.63 million as of January 2025), and Warner Bros. Discovery is the third (128 million streaming subscribers, including users of HBO Max and, to a smaller degree, Discovery+).
Speaking at the hearing, Sarandos said: “Netflix and Warner Bros. both have streaming services, but they are very complementary. In fact, 80 percent of HBO Max subscribers also subscribe to Netflix. We will give consumers more content for less.”
During the hearing, Democratic senator Amy Klobuchar of Minnesota asked Sarandos how Netflix can ensure that streaming remains “affordable” after a merger, especially after Netflix issued a price hike in January 2025 despite adding more subscribers.
Sarandos said the streaming industry is still competitive. The executive claimed that previous Netflix price hikes have come with “a lot more value” for subscribers.
“We are a one-click cancel, so if the consumer says, ‘That’s too much for what I’m getting,’ they can cancel with one click,” Sarandos said.
When pressed further on pricing, the executive argued that the merger doesn’t pose “any concentration risk” and that Netflix is working with the US Department of Justice on potential guardrails against more price hikes.
Sarandos claimed that the merger would “create more value for consumers.” However, his idea of value isn’t just about how much subscribers pay to stream but about content quality. By his calculations, which he provided without further details, Netflix subscribers spend an average of 35 cents per hour of content watched, compared to 90 cents for Paramount+.
The Netflix stat is similar to one provided by MoffettNathanson in January 2025, finding that in the prior quarter, on average, Netflix generated 34 cents in subscription fees per hour of content viewed per subscriber. At the time, the research firm said Paramount+ made an average of 76 cents per hour of content viewed per subscriber.
Downplaying Monopoly Concerns
Netflix views Warner as “both a competitor and a supplier,” Sarandos said when subcommittee chair Republican senator Mike Lee of Utah asked why Netflix wants to buy WB’s film studios, per Variety. The streaming executive claimed that Netflix’s “history is about adding more and more” content and choice.
During the hearing, Sarandos argued that streaming is a competitive business and pointed to Google, Apple, and Amazon as “deep-pocketed tech companies trying to run away with the TV business.” He tried to downplay concerns that Netflix could become a monopoly by emphasizing YouTube’s high TV viewership. Nielsen’s The Gauge tracker shows which platforms Americans use most when using their TVs (as opposed to laptops, tablets, or other devices). In December, it said that YouTube, not including YouTube TV, had more TV viewership (12.7 percent) than any other streaming video-on-demand service, including second-place Netflix (9 percent). Sarandos claimed that Netflix would have 21 percent of the streaming market if it merged with HBO Max.
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Tech
Measles Is Causing Brain Swelling in Children in South Carolina
Some children affected by measles in the ongoing South Carolina outbreak have developed a serious complication of the disease called encephalitis, or swelling of the brain, state epidemiologist Linda Bell said on Wednesday.
The South Carolina measles outbreak began in October with a handful of infections. As of February 3, cases have climbed to 876, with 700 of those being reported since the beginning of the year. The surge could mean another bad year of measles for the United States, which had more than 2,267 cases—the highest in 30 years—in 2025. Declining vaccination rates across the country are driving the resurgence.
Encephalitis is a rare but severe complication of measles that can lead to convulsions and cause deafness or intellectual disability in children. It usually occurs within 30 days of an initial measles infection and can happen if the brain becomes infected with the virus or if an immune reaction to the virus causes inflammation in the brain. Among children who get measles encephalitis, 10 to 15 percent die.
It’s not known how many children in South Carolina have developed this serious complication. Under state law, measles cases must be reported to the South Carolina Department of Public Health, but measles hospitalizations and complications do not need to be disclosed.
“We don’t comment on the outcomes of individuals, but we do know that inflammation of the brain, or encephalitis, is a known complication of measles,” Bell told reporters during a media briefing on Wednesday. “Anytime you have inflammation of the brain, there can be long-term consequences, things like developmental delay and impacts on the neurologic system that can be irreversible.”
The department is aware of 19 measles-related hospitalizations in the state, including some due to pneumonia, which occurs in about one in 20 children with measles and is the leading cause of death for children who get measles.
Bell also said that several pregnant women who were exposed to the virus required administration of immune globulin, a concentrated solution of antibodies. It provides temporary protection against measles for unvaccinated individuals. Measles exposure during pregnancy can cause preterm birth or miscarriage.
A rarer type of brain swelling called subacute sclerosing panencephalitis, or SSPE, can occur years after a measles infection. In September, the Los Angeles County Department of Public Health reported the death of a school-age child due to SSPE. The child was originally infected with measles as an infant before they were old enough to receive the measles vaccine, the first dose of which is recommended for children between 12 and 15 months old.
After recovering from the initial measles illness, the child developed SSPE, in which the virus remains dormant in the brain before triggering an inflammatory response that destroys brain tissue over time. The condition usually appears seven to 10 years after a person appears to recover from the initial measles infection. An estimated two in 10,000 people who get measles eventually develop SSPE.
The measles, mumps, and rubella (MMR) vaccine is the best way to prevent measles and serious complications associated with it.
Over 7,000 more doses of the MMR vaccine were given statewide in South Carolina this January compared to January 2025, a 72 percent increase. In Spartanburg County, the center of the outbreak, over 1,000 more doses were given this January compared to January 2025, a 162 percent increase. So far, January was the best month for measles vaccination during the outbreak, Bell said.
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