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Astaxanthin Supplementation Does Not Augment Fat Use or Improve Endurance Performance.
MedLine Citation:
PMID:  23274592     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
INTRODUCTION: Astaxanthin is a lipid-soluble carotenoid found in a variety of aquatic organisms. Prolonged astaxanthin supplementation has been reported to increase fat oxidative capacity and improve running time to exhaustion in mice. These data suggest that astaxanthin may be applied as a potent ergogenic aid in humans. PURPOSE: To assess the impact of 4 wks astaxanthin supplementation on substrate use and subsequent time trial performance in well-trained cyclists. METHODS: Using a double-blind parallel design, 32 young, well-trained male cyclists or triathletes (age: 25±1 y, weight: 73±1 kg, VO2peak: 60±1 mL·kg·min, Wmax: 395±7 W) were supplemented for 4 wks with 20 mg astaxanthin per day (ASTA) or a placebo (PLA). Before and after the supplementation period, subjects performed 60 min of exercise (50% Wmax), followed by a ~1 h time trial. RESULTS: Daily astaxanthin supplementation significantly increased basal plasma astaxanthin concentrations from non-detectable values to 187±19 μg·kg (P<0.05). This elevation was not reflected in greater total plasma anti-oxidant capacity (P=0.90) or attenuated malondialdehyde levels (P=0.63). Whole-body fat oxidation rates during submaximal exercise did not differ between groups and did not change over time (from 0.71±0.04 to 0.68±0.03 g·min and 0.66±0.04 to 0.61±0.05 g·min in the PLA and ASTA group, respectively; P=0.73). No improvements in time trial performance were observed in either group (from 236±9 to 239±7 and from 238±6 to 244±6 W in the PLA and ASTA group, respectively; P=0.63). CONCLUSIONS: Prolonged astaxanthin supplementation does not augment anti-oxidant capacity, increase fat oxidative capacity, or improve time trial performance in trained cyclists.
Authors:
Peter T Res; Naomi M Cermak; Rudi Stinkens; T J Tollakson; Guido R Haenen; Aalt Bast; Luc J C van Loon
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-27
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Department of Human Movement Sciences, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands 2Department of Toxicology, NUTRIM, Maastricht University Medical Centre+, Maastricht, the Netherlands.
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