Weight loss plateau? Fatima Cody Stanford on why it happens

A weight loss plateau happens because the body adjusts to a lower weight. A smaller body burns a little less, and appetite rises, until what you eat and what you burn meet again. That's expected, and it doesn't mean you failed. Instead of cutting harder, count holding steady as a result, keep the habits you'd keep anyway, take a weekly look, have a step ready for when weight creeps up, and keep moving.

Fatima Cody Stanford didn't always see it that way. "I was part of that camp that believed that it was just about how much exercise you did, how you ate," she told the American Medical Association's podcast in 2023. "And I would even say this to my patients in the past" (AMA Update). Early on, when patients told her what they hoped to weigh, she'd tell them about her own workouts; looking back, she says she wasn't empathizing.

Today she describes a moment many readers will know. You change how you eat, the weight comes off, you're "feeling really great," and then, lower down, "your body is resisting it." The scale stops, or turns. "And you're like, well, wait a minute, but I'm doing all the right things." In her account, that happens "not because you did something wrong, but because it deviated from where the brain felt it should be."

Hers is a clinician's view, and one part of it goes further than the research, as you'll see. The core, that the body pushes back, holds up well. Below: why the scale stops, what's true about set points and "starvation mode", and what to do instead of eating less and less.

Why has the scale stopped?

1. A smaller body needs less, so the gap closes

Kevin Hall, a nutrition scientist who spent 21 years at the US National Institutes of Health, describes "two sort of parallel negative feedback circuits." One lowers the calories the body burns, the other raises appetite, and together they decide "how much weight we lose and where we'll end up plateauing at a lower weight" (Guardian Science Weekly, 05:19).

Part of the first circuit is plain arithmetic: a smaller body burns less, so the eating that once left a gap now roughly matches what you burn. In The Lancet, Hall and colleagues wrote that official advice "erroneously" promised steady weekly loss from a fixed cut in calories. In their model, the body responds to a lasting change in eating slowly, "with half times of about 1 year": half of the eventual change takes a year to arrive (Hall et al., 2011).

The 2013 US guideline on weight management sums up diet trials this way: average weight loss "is maximal at 6 months," with slow regain after that (Jensen et al., 2014). Leveling off some months in is the usual course.

2. Appetite rises, and stays up

The second circuit is the one people feel. In one study, 50 adults with overweight or obesity lost weight on a ten-week, very-low-energy diet. A year later, several hormones that drive appetite still hadn't returned to their starting levels, and people still rated themselves hungrier than before (Sumithran et al., 2011; only the summary of this paper is in our sources). Hall describes the same pattern from lab studies: as people lose more weight, "their appetite increases above where they started."

This is the part that's easiest to mistake for weakness. France's national care guide tells clinicians to explain these changes after weight loss precisely to limit guilt and self-blame, which it calls important reasons people lose motivation (Haute Autorité de Santé). Our guide to always feeling hungry covers what helps with hunger day to day.

3. Think of a "set range", and hold the idea loosely

Stanford prefers another word. "I know set point sounds better, but it's more of a set range," she said. Most people, she notes, stay within a fairly narrow band; after a holiday season, the body "kind of recalibrates" and drifts back. And the range can move: "The set point can be changed."

The neuroscientist Sandra Aamodt, in a 2013 TED talk, also calls it a range and compares the brain to a thermostat: "Your brain also has its own sense of what you should weigh" (TED, 01:41).

The evolutionary anthropologist Herman Pontzer is more cautious. He says that "as a general rule of thumb, yeah, the set point is real," but that it "doesn't hold super well scientifically." The body may not be tracking its weight at all, he suggests, but other signals, such as hunger and fullness, which settle at a weight we then call a set point (A Whole New Level, the podcast of Levels, a company that sells glucose monitors). So use the set range as a way to picture the push-back, not as a number your body is guarding.

Is "starvation mode" real?

4. The slowdown is real, smaller than its reputation, and not what decides regain

Here is where Stanford's account goes further than the studies. She says that near a lower weight "your resting metabolic rate drops dramatically." Research on ordinary diets paints a milder picture.

In Trondheim, Norway, 71 adults with obesity followed a strict low-calorie diet for eight weeks, held their weight steady for four, then joined a program to keep it off (Martins et al., 2020). Right after the diet, they burned a little less at rest than their new size predicted. After four steady weeks that gap had roughly halved, and a year on, among the 45 measured every time, it couldn't be detected. Its size wasn't linked to how much weight people regained. The authors' title calls it "an illusion," which overstates it: a small gap remained after the four steady weeks.

The large, lasting slowdown in the headlines comes from 14 contestants of The Biggest Loser, an extreme TV competition, who six years later still burned far less at rest than expected (Fothergill et al., 2016). That's 14 people after an extreme program, with no comparison group, and even there the slowdown at the end of the competition wasn't linked to how much weight came back.

So the "starvation mode" that says your body stops losing, or hoards fat, because you ate too little isn't what these studies show. They show a modest drop in energy use, appetite that stays higher, and a body that responds slowly. Eating even less fixes none of that.

What to do on a plateau

The best long-term picture of people who keep weight off comes from the US National Weight Control Registry. Its members volunteered after losing at least 30 pounds and keeping it off for a year, so they're a self-selected group, and their weights are self-reported. In a ten-year follow-up of 2,886 members, most of the weight lost stayed off, and those whose activity and weighing dropped off tended to regain more (Thomas et al., 2014). Another registry study found small regains common and recovery rare: of those who gained any weight in a year, only 11% were back at or below their weight at the start of the study a year later (Phelan et al., 2003).

5. Count holding steady as a result

The French care guide puts it plainly: keeping weight stable "est déjà un succès en soi", is already a success in itself (Haute Autorité de Santé). Germany's national obesity guideline notes that within the first year after weight loss, most patients regain 30 to 50% of what they lost (German S3 guideline, 2024). Holding at a lower weight is beating that curve, even while the scale says nothing new.

And it may get easier: registry researchers Rena Wing and Suzanne Phelan reported that after two to five years of keeping weight off, the chance of longer-term success "greatly increases" (Wing & Phelan, 2005).

6. Keep the habits you'd keep anyway, and don't start a stricter diet

A plateau tempts people to cut harder or switch diets. Stanford is "not a fan of going on a diet." She starts instead from food quality fitted to the person, activities they enjoy "so that they can do them long-term," and sleep, whose quality and duration she says play "a large role." Those are her clinical views; our article on sleep deprivation covers what's known about short sleep.

So keep what's working, as something you'd do even if the scale never moved again. Our guides to the best diet for weight loss and all-or-nothing eating explain why switching plans rarely helps. Stanford also notes that some prescribed medicines can shift weight. If a stall or a gain began with a new medicine, talk to your doctor before changing anything.

7. Take a weekly look, and decide what the scale is for

A review of 17 studies of adults in weight programs found that weighing more often went with more weight loss and less regain, with no sign of harm to mood in the studies that looked (Zheng et al., 2015). These were associations, and the authors couldn't say whether daily or weekly is best. Some trials of regular weighing, including STOP Regain below, left out people with a history of eating disorders.

So if you weigh, pick one day a week and treat the number as information. Then ask the question that matters more: which habits held this week? If the scale starts to feel like a verdict, stop weighing and keep the habits.

8. Have a "back on track" step ready before you need it

The best-tested version of this is STOP Regain, a trial of 314 adults who had lost at least a tenth of their weight (Wing et al., 2006). Participants learned to use a scale and a color-zone system like a thermostat, to tell when their eating and activity needed adjusting. Over 18 months, 72% of a comparison group who got only newsletters regained about 5 pounds or more, against 46% in the face-to-face program. The program included regular meetings, so the scale alone can't take the credit.

The lesson: decide in advance what you'll do, so a small regain doesn't become starting over. Here's a simple rule of our own, untested: if two weekly looks in a row show your habits slipping, go back to your first two habits for a week. Don't start a new plan.

9. Keep moving, because that may be where exercise helps most

Hall says people often quit exercise because "they don't see the scale budge very much." Its "superstar qualities," in his words, are "the ability to maintain the weight loss over long periods of time" (Guardian Science Weekly, 08:36). Judge your walk by whether it happened, not by the next weigh-in. Our article on walking for weight loss goes further.

You're probably not doing it wrong

On a plateau, "I'm doing all the right things" starts to sound like an excuse, even to yourself. The research says the body is doing what bodies do after weight loss. Stanford's test for a good visit is whether a patient leaves feeling "that I am not necessarily the problem, and that there's part of my biology that's working with this problem." If you do one thing this week, write down the habits that got you here, and plan to keep them. Our guides to losing weight sustainably and eating at night go further.

To build this around your own days, try the 1h Protocol to Lose Weight Sustainably. The first chapter is free: a few questions find your pattern and give you one first step. The full program is practical education and takes about an hour. It walks through one day with you, and you leave with a page of habits built from your own answers, a plan for the "just one" moment, a moment card for your lock screen, a fourteen-day sheet, and day-7 and day-14 reviews in your calendar. It includes a weekly look at which habits held and, for adults who switch it on, a weekly weigh-in the program never reads or stores. You can write your own goal, a number included; the program never sets one. Short check-ins follow by email on days 1, 7, 14 and 30. Start free

Frequently asked questions

Why has my weight loss stopped?

Because the body adjusts. A smaller body burns a little less, and appetite rises after weight loss, so the eating that made a gap now roughly matches what you burn. In diet trials, loss is usually greatest at about six months (Jensen et al., 2014). It isn't a sign you've done something wrong.

How long does a weight loss plateau last?

No study in our sources gives it a fixed length. Weight responds slowly to a lasting change in eating: in Hall's model, about half of the full change takes a year (Hall et al., 2011). If weight has held on habits you can keep, France's care guide calls that a success in itself.

Is "starvation mode" real?

Not in the popular sense. After an ordinary eight-week diet, the drop in energy burned at rest was small, halved once weight held steady, and couldn't be detected a year later; it didn't predict regain (Martins et al., 2020). The large, lasting slowdown in the headlines came from 14 contestants of an extreme TV competition.

What is a set point?

An idea some experts use to explain why weight drifts back: the body tends to settle within a range. Fatima Cody Stanford calls it a "set range" that can change; Herman Pontzer says it "doesn't hold super well scientifically." Treat it as a picture of the push-back, not a fixed number.

How do people keep weight off?

In the National Weight Control Registry, a self-selected group of people who had kept weight off, most of the weight stayed off over ten years, and people whose activity and self-weighing dropped off tended to regain more (Thomas et al., 2014). Keep the habits, look weekly, act early on small regains, and keep moving.

Sources

This article draws on Fatima Cody Stanford's interview on AMA Update, Kevin Hall's on Guardian Science Weekly, Herman Pontzer's on A Whole New Level, Sandra Aamodt's TED talk, two national guidelines and a care guide, and the studies listed below.

• Obesity, weight loss treatments, set point theory and more with Fatima Cody Stanford (video and podcast interview, AMA Update, 2023)
• The real science of weight loss with Kevin Hall (podcast episode, Guardian Science Weekly, 2025)
• Sandra Aamodt, Why dieting doesn't usually work (TED talk, 2013)
• Why You Can't Exercise Your Way to Weight Loss, with Herman Pontzer (podcast write-up, A Whole New Level, Levels, 2026)
• Jensen et al, 2013 AHA/ACC/TOS Guideline for the Management of Overweight and Obesity in Adults (US clinical guideline, 2013 edition, published 2014)
• Hall et al, Quantification of the effect of energy imbalance on bodyweight (modeling study, The Lancet, 2011)
• Sumithran et al, Long-term persistence of hormonal adaptations to weight loss (study of 50 adults followed for a year, NEJM, 2011; abstract only)
• Martins et al, Metabolic adaptation is an illusion, only present when participants are in negative energy balance (analysis of 71 adults in a Norwegian trial, 2020)
• Fothergill et al, Persistent metabolic adaptation 6 years after The Biggest Loser competition (follow-up of 14 contestants, 2016)
• Haute Autorité de Santé, Guide du parcours de soins: surpoids et obésité de l'adulte (French national care guide, updated 2024)
• German S3 guideline on the prevention and treatment of obesity, Version 5.0 (national guideline, 2024)
• Thomas et al, Weight-loss maintenance for 10 years in the National Weight Control Registry (registry cohort of 2,886 adults, 2014; abstract only)
• Phelan et al, Recovery from relapse among successful weight maintainers (registry cohort of 2,400 adults, 2003)
• Wing & Phelan, Long-term weight loss maintenance (review of registry findings, 2005)
• Zheng et al, Self-weighing in weight management: a systematic literature review (systematic review of 17 studies, 2015)
• Wing et al, A self-regulation program for maintenance of weight loss (randomized trial, 314 adults, STOP Regain, NEJM, 2006)