Estimation of True Calcium Absorption in Men Robert P. Heaney 1 , a , Mary Susan Dowell 1 and Randi L. Wolf 2 1 Creighton University, Omaha, NE 68131 2 Teachers College, Columbia University, New York, NY 10027 ↵ a address correspondence to this author at: Creighton University, 601 N. 30th St., Suite 4841, Omaha, NE 68131; fax 402-280-4751, e-mail email@example.com When both calcium intake and calcium absorption are measured under controlled conditions, variation in absorption efficiency explains more of the interindividual differences in balance than does actual calcium intake ( 1 ). Small wonder, therefore, that interest in measuring absorption has remained high for nearly 40 years. True calcium absorption is defined as the quantitative, unidirectional flux of calcium from intestinal lumen into the blood. It is most accurately measured by a dual-tracer method, with one tracer labeling the oral calcium load and the other labeling the miscible calcium pool into which the absorbed calcium is introduced. This approach was first developed into a practicable human test by deGrazia et al. ( 2 ). As described, it is usually time-consuming and expensive. To reduce these barriers for widespread use, Heaney and Recker ( 3 )( 4 )
Clinical Chemistry – American Association for Clinical Chemistry
Published: May 1, 2002
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera