Fish oil may or may not help you with weight management, or more specifically, fat management. Several factors come into play, some of which can enhance the positive effects of fish oil and others of which can undermine them.
Many studies have looked into the potential role of fish oil weight loss. Unfortunately, very few have explored the effects of other factors on their results, either negatively or positively. This explains why so many reports on PubMed, our national medical database, have contradictory conclusions.
One of the better studies, published in the American Journal of Clinical Nutrition in 2007, shows that fish oils can reduce fat mass and increase lean mass, whereas vegetable oils can do just the opposite. This and similar reports point to the positive effects of omega-3 fatty acids from fish and the negative effects of omega-6 fatty acids from vegetable oils.
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.
The bottom line among all the seemingly contradictory results of studies that entail the effects of fish oil on weight loss can be summarized in four take-home lessons:
1) The overabundance of omega-6 fatty acids from vegetable oils negates the benefits of omega-3 fatty acids from fish oil. Our modern dietary intake of omega-6 and omega-3 fatty acids is in a ratio of about 20:1. It should be closer to 2:1. Consume less vegetable oil and more fish oil.
2) The benefits of dietary fish oil for fat loss and lean body mass are boosted by even moderate exercise. Such benefits are insignificant in the absence of exercise.
3) The benefits of fish oil can be completely undermined by dietary sugar. Indeed, fructose and its occurrence in so many foods and beverages can be especially harmful against the otherwise beneficial effects of fish oil.
4) The minimum intake of fish oil should be at least 1.5 grams per day, with 2-3 grams being even better. The best fish oil supplements offer the highest amounts of the two main omega-3 fatty acids from fish - i.e., EPA and DHA.
Many studies have looked into the potential role of fish oil weight loss. Unfortunately, very few have explored the effects of other factors on their results, either negatively or positively. This explains why so many reports on PubMed, our national medical database, have contradictory conclusions.
One of the better studies, published in the American Journal of Clinical Nutrition in 2007, shows that fish oils can reduce fat mass and increase lean mass, whereas vegetable oils can do just the opposite. This and similar reports point to the positive effects of omega-3 fatty acids from fish and the negative effects of omega-6 fatty acids from vegetable oils.
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.
The bottom line among all the seemingly contradictory results of studies that entail the effects of fish oil on weight loss can be summarized in four take-home lessons:
1) The overabundance of omega-6 fatty acids from vegetable oils negates the benefits of omega-3 fatty acids from fish oil. Our modern dietary intake of omega-6 and omega-3 fatty acids is in a ratio of about 20:1. It should be closer to 2:1. Consume less vegetable oil and more fish oil.
2) The benefits of dietary fish oil for fat loss and lean body mass are boosted by even moderate exercise. Such benefits are insignificant in the absence of exercise.
3) The benefits of fish oil can be completely undermined by dietary sugar. Indeed, fructose and its occurrence in so many foods and beverages can be especially harmful against the otherwise beneficial effects of fish oil.
4) The minimum intake of fish oil should be at least 1.5 grams per day, with 2-3 grams being even better. The best fish oil supplements offer the highest amounts of the two main omega-3 fatty acids from fish - i.e., EPA and DHA.
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