In the research, mice were fed a high-fat diet were injected with the compound AP39, which delivers hydrogen sulfide direct to mitochondria in cells The research concluded that the treatment significantly slowed the rate of weight gain, reduced by 32 per cent on average, over the 12 weeks of the study. The team also found that treatment reduced the accumulation of fat in the liver, which can be a complication of obesity and can lead to harmful inflammation.