Why was this study done?

Determining the effectiveness of supplemental forms of nutrients is of upmost importance for the manufacture of quality supplements. This study was designed to test the effectiveness of an algae-derived beta-carotene compared to food-based (carrots).

What did the study find?

This study found that supplemental carotenes (in an oily base derived from algae) are better absorbed than those from dietary sources.

Repletion and depletion of serum alpha and beta carotene in humans with carrots and an algae-derived supplement
Authors: Jensen CD, Pattison TS, Spiller GA, Whittam JH, Scala J. Acta Vitaminol Enzymol. 1985;7(3-4):189-98.
PubMed Citation PMID: 4091148.
PDF Manuscript: Acta Vitaminol Enzymol, 1985.

Earlier Abstract:

Pattison TS, et al. Comparison of Serum Carotene Repletion with Two Levels of Carrots and an Algae-Derived Product in Healthy Adult humans. Fed Proc, 1985. 44(3):771.PDF Abstract: Fed Proc, 1985.