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
-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.
To determine the effects of supplemental fish oil (FO) on resting metabolic rate (RMR), body composition, and cortisol production in healthy adults.
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.
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/