Such nutrients include vitamins A, E and K, which have previously been associated with cancer prevention and improved vision.
Nutrient absorption increases proportionally to the amount of oil added.
Colorado-based Ms Wicks spoke to Healthista about the signs that you're suffering from 'stress belly', as she calls it.
Dieting alone is not enough to tackle the problem, she says – you have to combine healthy eating with stress management techniques.
They also used an electromechanical device called an accelerometers that were placed around their waists to measure how much time these people spent sitting down over the course of a week.
The researchers found that the link between visceral fat and sitting down was strongest for those those who did not meet the public health recommendation of 150 weekly minutes of moderate-intensity physical activity.
Experts say even slim-looking people can have this dangerous fat on the inside, that's wrapped around the liver, pancreas and kidneys.
Professor White said: 'The best way to explain it would be to say that adding twice the amount of salad dressing leads to twice the nutrient absorption.'Maximum absorption occurred at 32g, which is the equivalent of around two tablespoons and is the recommended daily intake according to US dietary guidelines.
Previous research reveals adding fat to vegetables in the form of oil, nuts or cheese boosts the absorption of fat-soluble nutrients, such as lycopene, which is found in tomatoes, and beta-carotene, which is abundant in carrots.
Does the rest of your body seems to be shaping up, but nothing seems to work to shift that pesky fat around your middle? That's according to health expert Jackie Wicks, co-author of new book Cheats & Eats: Lifestyle Programme.
When cortisol – the so-called stress hormone – is too high for too long, it can increase the amount of fat that's stored on your stomach, she explained.