Can You Lose Enough Weight to Change Diabetes Without Losing the Muscle You Need?

Good Morning.

Losing a substantial amount of weight can improve type 2 diabetes. But there is a complication that receives less attention.

Weight loss doesn’t come entirely from body fat.

When calories are reduced sharply, the body can lose muscle too. That matters at any age, but particularly as we get older, when maintaining muscle becomes increasingly important for strength, mobility and metabolic health.

A recent clinical trial asked whether those two goals could be pursued at the same time.

Researchers studied adults with early-onset type 2 diabetes and obesity who were not using insulin. Participants in an intensive six-month program began with a medically supervised low-calorie diet while also doing structured aerobic and resistance exercise.

By the end of the study, 54 percent of participants in the intervention group had reached diabetes remission, compared with about 4 percent receiving standard care. They also lost a substantial amount of body fat while preserving much of their lean mass.

That question has become even more relevant with the rise of GLP-1 drugs such as semaglutide and tirzepatide. These medications can produce significant weight loss, but some of that loss can come from lean tissue as well as fat. That doesn’t make the drugs harmful to muscle. It reflects a broader truth about substantial weight loss: the body doesn’t always lose only the tissue we want it to lose.

The study was small, and six months is far too soon to know how durable that remission will be. The program was also intensive enough that its results shouldn’t be interpreted as an invitation to attempt severe calorie restriction without medical supervision.

But the larger point is becoming harder to ignore.

The number on the scale doesn’t tell us what kind of weight disappeared.

That matters whether weight loss comes from diet, exercise, medication or some combination of the three.

Increasingly, the goal isn’t simply to become lighter. It’s to lose enough fat to improve health while preserving as much muscle as possible.

Longevity

The Long Game
One small thing for a longer life

Did You Know

The time of day we eat may matter more than we once thought.

Researchers studying time-restricted eating have found that keeping meals within a consistent daily window can modestly improve blood sugar regulation in some adults. In one randomized trial involving people with metabolic syndrome, an 8- to 10-hour eating window produced a small improvement in HbA1c after three months.

Part of the reason may be circadian. Our ability to process glucose changes over the course of the day, and the same meal can produce a larger glucose response when eaten later.

That doesn’t mean everyone needs to stop eating at a particular hour. But it does suggest that when we eat may matter alongside what and how much we eat.

Source: Annals of Internal Medicine, Time-Restricted Eating in Adults With Metabolic Syndrome (2024).

When and how we eat is one piece of a bigger picture. The Worthyest Longevity Index measures six factors that shape how well we age in 4 minutes. Yours, personalized.

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The Curiosity Edit

Today’s Insight: Brain Health & Aging

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The Conscious Plate:

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Final Note

This is what we leave you with. A thought to end the day, carry in your pocket, or come back to later. Nothing big. Just something to reflect on.

What Effort Looks Like From the Outside

We tend to admire people who make difficult things look easy without seeing how much effort went into making them look that way.

Skill often hides its own history. What looks natural from the outside may be the result of repetition, correction, frustration, and a great deal of practice that happened when nobody was watching.

By the time we notice the ease, most of the effort has already disappeared from view.

That can make other people’s abilities seem more effortless than they really are.

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