Health Claims

If elite male cyclists eat a super high-fat diet for 6 days before carb-loading for a day, they’ll feel just as fast over a long 100-km ride — but they’ll have less power for short, intense sprints compared to when they eat a high-carb diet first.

Elite race walkers who follow a keto diet for 3 weeks start burning fat for fuel during intense exercise, and their bodies show signs of ketosis — like having 1 mmol/L of ketones in the blood — even when working hard.

Elite race walkers who eat lots of carbs or time their carb intake during intense training get about 5-6% faster in a 10 km race, but those on a keto diet don’t get any faster.

Even if elite race walkers don't change their diet, their stamina can still improve after a few weeks of intense training, as long as they're eating enough calories.

Even though elite race walkers get better at using oxygen overall on a keto diet, the diet makes their bodies use more oxygen during race pace, so their performance doesn’t actually improve after 3 weeks.

Elite race walkers who eat a super low-carb, high-fat diet for 3 weeks start burning fat like crazy when they exercise — one of the highest fat-burning rates ever seen in top athletes.

If untrained guys eat a high-fat diet for 7 weeks, their muscles use less stored sugar during medium-intensity exercise compared to eating a high-carb diet — it’s like saving their fuel — but their legs still take up the same amount of glucose from the blood.

If untrained guys eat a high-fat diet for 7 weeks, they burn more fat during exercise than if they eat a high-carb diet.

If untrained guys eat a high-fat diet for 7 weeks, their bodies get better at burning fat from the blood during exercise compared to eating a high-carb diet.

For endurance athletes, switching to a high-fat diet for six days and then loading up on carbs doesn’t seem to boost performance in a one-hour cycling test compared to sticking with a high-carb diet.

Even after endurance athletes eat lots of carbs for a day, their bodies still burn more fat than usual if they recently spent a week on a high-fat diet.

When endurance athletes eat a high-fat diet for 6 days, their bodies burn less carbs during a long bike ride compared to when they eat a high-carb diet — showing their metabolism switches to using more fat for fuel.

If endurance athletes eat a high-fat, low-carb diet for just 6 days, their bodies burn way more fat during a long bike ride — about 50 grams more over 4 hours — compared to when they eat lots of carbs, even if they're used to carb-heavy diets.

When these lab mice are exposed to a chemical called BDE-47, it might slow down their liver's ability to burn fat, leading to fat buildup that could cause a type of liver disease.

In these lab mice, a chemical called BDE-47 turns up a protein that pulls more fat into the liver, which can lead to fatty liver disease.

In mice, being exposed to a chemical called BDE-47 might cause their livers to store more fat and not burn it properly, leading to fatty liver and signs of liver damage — a possible early sign of a liver disease linked to metabolism problems.

Probiotics might help with weight loss by changing how your body burns energy, turning certain genes on or off, and shifting the balance of gut bacteria—like boosting good bacteria (Bacteroidetes) and reducing others (Firmicutes).

Taking a mix of good bacteria and fiber every day for three months might help obese women eat less and feel better about their bodies, leading to weight loss.

Taking a probiotic called Bifidobacterium breve B-3 daily for three months might help reduce body fat and improve cholesterol levels in people who are slightly overweight.

Taking a mix of good bacteria for six weeks might help lower bad cholesterol and inflammation while improving good cholesterol and blood sugar control, especially if also taking fish oil.

Taking a specific probiotic every day for three months might help people who are overweight lose belly fat and weigh less.

A type of industrial chemical might turn on a certain human cell signal at high levels, but actually turns it off at lower levels that are more like what people are exposed to.

When liver cells are exposed to a common pollutant at a certain level, they start changing how they make energy — switching from their normal method to one usually seen in cancer cells, even though they're not cancerous.

Being exposed to a certain chemical (SCCPs) at a specific level seems to mess up how liver cells burn fat, based on lab tests with human liver cells in a dish.