Belly Fat: What Actually Works, and What Is Sold to You

There is a version of this article on almost every health site, and it usually contains green tea, thyme and the claim that laughing burns calories.

Ours used to as well. We have rewritten it, because the real answer is more interesting than the marketing one and considerably more useful.

There Are Two Kinds of Belly Fat

This distinction is missing from almost everything written on the subject, and it changes what you should care about.

Subcutaneous fat sits under the skin. It is the part you can take hold of. It is less risky, though not harmless.

Visceral fat sits deeper, around and inside the organs. You cannot pinch it, you cannot see it directly, and it is the one that tracks with blood pressure, blood sugar and cardiovascular risk.

Which means a person can look much the same and be in a very different position, and it means the mirror is a poor instrument for the thing that actually matters.

It also means the honest goal is not a flatter stomach. It is less fat in the places you cannot see.

The Mechanism That Makes This Worth Doing

Here is the part that changed how we think about all of this.

Fat does not only sit in fat cells. It also accumulates inside muscle cells, and when it does, it interferes with the signal that tells those cells to let sugar in from the blood.

It happens quickly. At the Pennington Biomedical Research Center, ten healthy young men, average age 23, were put on a diet drawing half its calories from fat, with no extra calories. After three days, genes that build the cell’s energy machinery were turned down by 20 to 25 percent.

And it reverses. In Rome, eight people with severe obesity were studied six months after an operation that blocks most fat absorption. The fat inside their muscle cells fell by about 87 percent and their insulin resistance returned to normal, even though they were still in the obese range. A group who lost weight on an ordinary low-calorie diet saw much smaller changes, so this shows what removing fat can do, not how fast a normal diet does it.

The point is that the cells started working properly while the people were still well above a healthy weight.

It is one reason the bathroom scale is a slow and incomplete signal.

What Actually Helps With Belly Fat

1. Change the density of the food, not the quantity

Your stomach measures volume. There are stretch receptors in the wall of it, and when enough bulk arrives they report that you have eaten.

Vegetables carry one to two hundred calories a pound. Potatoes and oatmeal carry about 300 to 400, beans and rice about 550 to 600. Oil carries about four thousand.

Build meals from the middle of that range and you can eat until you are full without the arithmetic working against you. The four numbers are here, and they are the most useful thing we ever learned about eating.

2. Eat an apple first

This is one of the most practical findings in the research, and it is rarely written up properly.

In the Penn State preloading experiments, people were given a pasta lunch and told to eat freely. They ate around 900 calories.

• A low-calorie salad first cut the whole meal by 7 to 12 percent.
• A whole apple first meant people ate about 15 percent less at that meal overall, apple included.
• The same apples as applesauce did about half as well.
• The same salad with a fatty dressing and shredded cheese reversed the effect entirely. The meal ended up bigger.

And the timing study that matters most. In a three-month trial in Iran, people on a reduced-calorie diet who ate salad, yogurt and water fifteen minutes before lunch and dinner lost more weight than a group who ate the same foods alongside their meals.

Same food. Same calories. Different order.

The rule that falls out of it: a preload has to be under about 100 calories a cup to be worth it. Drown it in dressing and you have made a starter, not a preload.

3. Blend it

Women who started lunch with a casserole and a glass of water ate about a quarter more at the meal that followed than when the same water was cooked into the casserole as soup.

Identical ingredients, and the only difference was the physical form. A separate MRI study showed that blended soup stays in the stomach longer.

The reason is mechanical. Water sitting beside solid food gets strained through the stomach quickly. Water bound into the food empties slowly. Which is why soup is the workhorse of this entire way of eating.

4. Water is good for you, not an appetite trick

Water drunk alongside a meal does not make you feel fuller or eat less.

Water is good for you, but we no longer suggest it as a way to eat less. Drink when you are thirsty.

5. Sleep, which is not a filler tip

Short sleep makes you hungrier on the same food, and it weakens the part of the brain that runs deliberate decisions.

In controlled trials, people ate noticeably more after short nights, and the extra came mostly from fattier foods. That is an experimental finding, not a comment on anybody’s character.

6. Beans, for a reason that has nothing to do with your waist

Across five separate populations on different continents, legumes were the most reliable dietary predictor of survival in older people: a 7 to 8 percent lower death rate for every 20 grams eaten daily. Twenty grams is two tablespoons.

We include it here because it is a better reason to change your dinner than a waistband is, and because reasons that outlast January are the ones worth having.

What Does Not Work, Including Things We Used to Recommend

• Fat-burning foods. No food burns fat. Thyme does not. Cayenne does not. Grapefruit does not.
• Green tea as a fat burner. Tea is a good drink. The measured effects on body fat are small enough that you would never notice them, and they do not survive contact with an ordinary diet.
• Flushing toxins. Your liver and kidneys do the clearing. There is nothing to flush and water does not flush it.
• Targeted exercise. Crunches build the muscle underneath. They do not thin the layer above. Why spot reduction does not work.
• Six small meals a day. Fine if you like eating that way. It does not raise metabolism, and grazing makes it harder to notice hunger at all.
• Laughing. We genuinely had this in the previous version of this article. Laughing is good for plenty of things, but its measured effect on energy use is tiny.

If You Change One Thing

Put a real starch at lunch.

If evenings are hard, look at lunch first. A small lunch tends to come back as hunger after dinner.

• Easy Red Lentil Soup
• Bean Stuffed Sweet Potatoes
• Oil-Free Roasted Potatoes

Venny is a medical doctor and a specialist in Nutrition and Dietetics; Andy holds a master’s degree in psychology. This is general information rather than medical advice. If you take medication for blood pressure or blood sugar, changes of this kind can move those numbers quickly enough to need your doses reviewed, so your doctor should be involved before you start rather than afterward.

And, always, seek health consciously.

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