Journal of the International Society of Sports Nutrition 2010,
7:31doi:10.1186/1550-2783-7-31 Published:8 October 2010-Eric E Noreen , Michael J Sass , Megan L Crowe , Vanessa A Pabon ,Josef Brandauer and Lindsay K Averill
Department of Health Sciences, Gettysburg College, Gettysburg Pennsylvania, USA
Effects of supplemental fish oil on resting metabolic rate, body composition, and salivary cortisol in healthy adults
CONCLUSION:
-6 weeks of supplementation with Fish Oil significantly increased lean mass and decreased fat mass.
-These changes were significantly correlated with a reduction in salivary cortisol following Fish Oil treatment.
Abstract (provisional)
Background
To determine the effects of supplemental fish oil (FO) on resting metabolic rate (RMR), body composition, and cortisol production in healthy adults.
Method
A total of 44 men and women (34+13y, mean+SD) participated in the study. All testing was performed first thing in the morning following an overnight fast.
Baseline measurements of RMR were measured using indirect calorimetry using a facemask, and body composition was measured using air displacement plethysmography.
Saliva was collected via passive drool and analyzed for cortisol concentration using ELISA.
Following baseline testing, subjects were randomly assigned in a double blind manner to one of two groups: 4g/d of Safflower Oil (SO); or 4g/d of FO supplying 1,600mg/d eicosapentaenoic acid (EPA) and 800mg/d docosahexaenoic acid (DHA).
All tests were repeated following 6wk of treatment. Pre to post differences were analyzed using a treatment X time repeated measures ANOVA, and correlations were analyzed using Pearson’s r.
Results
Compared to the SO group, there was a significant increase in fat free mass following treatment with FO (FO= +0.5 +/- 0.5kg, SO= -0.1 +/- 1.2kg, p=0.03), a significant reduction in fat mass (FO= -0.5 +/- 1.3kg, SO= +0.2 +/- 1.2kg, p=0.04). and a tendency for a decrease in body fat percentage (FO= -0.4 +/- 1.3% body fat, SO= +0. 3 +/- 1.5% body fat, p=0.08).
No significant differences were observed for body mass (FO= 0.0 +/- 0.9kg, SO= +0.2 +/- 0.8kg), RMR (FO= +17 +/- 260kcal, SO= -62 +/- 184kcal) or respiratory exchange ratio (FO= -0.02 +/- 0.09, SO= +0.02 +/- 0.05).
There was a tendency for salivary cortisol to decrease in the FO group (FO= -0.064 +/- 0.142ug/dL, SO= +0.016 +/- 0.272ug/dL, p=0.11).
There was a significant correlation in the FO group between change in cortisol and change in fat free mass (r = -0.504, p=0.02) and fat mass (r = 0.661, p=0.001)
URL Link: http://www.jissn.com/content/7/1/31
another good article in the Journal of Surgical Neurology April 2006, by one of the surgeons for Pittsburgh Steelers https://adjust2it.wordpress.com/category/fish-oil-neurosurgeon-for-the-pittsburg-steelers/
Side Note: Buy from reputable companies! It doesn’t pay to find the cheapest fish oil products. You wouldn’t shop for cheapest heart surgeon for a loved one would you? Read this link on fish oil lawsuit in 2010. https://adjust2it.wordpress.com/category/fish-oil-lawsuit-2010/
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