Fish Oil Weight Loss
By Dr. Mary Butler
Fish oil can help tremendously with fat metabolism and weight loss. However, certain factors can boost these benefits and other factors can completely cancel them.
A multitude of studies have examined the potential effects of fish oil weight loss. Unfortunately, relatively few have shown how other factors might influence the results, either positively or negatively. This is why so many studies listed on PubMed, our national medical database, show contradictory results.
In examining one study that compares fish oil vs. sunflower oil, from a 2007 article in the American Journal of Clinical Nutrition, we can see why results can vary. This and other such comparative reports point out the positive effects of omega-3 fatty acids in fish oil as well as the negative effects of omega-6 fatty acids in sunflower oil.
In addition, this study also showed that a crucial factor for getting positive effects from fish oil is exercise. Even moderate exercise, such as walking for 45 minutes at 75 percent of age-predicted maximal heart rate, just 3 days each week, boosts the benefits of fish oil. In the absence of exercise, the effects of fish oil are insignificant.
In sum, piercing through all the seemingly contradictory conclusions from different studies on the effects of fish oil on weight loss, we can take away four consistent health lessons:
1) Vegetable oils undermine the benefits of fish oils. This lesson points directly to the modern intake of omega-6 to omega-3 fatty acids in a ratio of about 20:1, which should be closer to about 2:1. In other words, we should consume less vegetable oil and more fish oil.
2) Fish oil is beneficial for losing fat and building lean mass, in combination with moderate exercise. There are almost no such benefits in the absence of exercise.
3) The positive effects from consuming fish oil are also negated by dietary sugar. Fructose and its ubiquitous occurrence in foods and beverages in the form of high fructose corn syrup can be particulary powerful in undermining the benefits of fish oil.
4) The daily amount of fish oil is crucial. It should be at least 1.5 grams, with 2-3 grams being even better. It is also important to take fish oil supplements that have the highest amounts of EPA and DHA, which are the two main omega-3 fatty acids in fish oil.
A multitude of studies have examined the potential effects of fish oil weight loss. Unfortunately, relatively few have shown how other factors might influence the results, either positively or negatively. This is why so many studies listed on PubMed, our national medical database, show contradictory results.
In examining one study that compares fish oil vs. sunflower oil, from a 2007 article in the American Journal of Clinical Nutrition, we can see why results can vary. This and other such comparative reports point out the positive effects of omega-3 fatty acids in fish oil as well as the negative effects of omega-6 fatty acids in sunflower oil.
In addition, this study also showed that a crucial factor for getting positive effects from fish oil is exercise. Even moderate exercise, such as walking for 45 minutes at 75 percent of age-predicted maximal heart rate, just 3 days each week, boosts the benefits of fish oil. In the absence of exercise, the effects of fish oil are insignificant.
In sum, piercing through all the seemingly contradictory conclusions from different studies on the effects of fish oil on weight loss, we can take away four consistent health lessons:
1) Vegetable oils undermine the benefits of fish oils. This lesson points directly to the modern intake of omega-6 to omega-3 fatty acids in a ratio of about 20:1, which should be closer to about 2:1. In other words, we should consume less vegetable oil and more fish oil.
2) Fish oil is beneficial for losing fat and building lean mass, in combination with moderate exercise. There are almost no such benefits in the absence of exercise.
3) The positive effects from consuming fish oil are also negated by dietary sugar. Fructose and its ubiquitous occurrence in foods and beverages in the form of high fructose corn syrup can be particulary powerful in undermining the benefits of fish oil.
4) The daily amount of fish oil is crucial. It should be at least 1.5 grams, with 2-3 grams being even better. It is also important to take fish oil supplements that have the highest amounts of EPA and DHA, which are the two main omega-3 fatty acids in fish oil.