From Joyce Smith
Researchers at Harvard Medical School who have genetically engineered mice with a gene from a nematode worm to enrich their tissues and milk with omega-3 (7 February, p 18) may be unaware of the research done in the UK at the Institute of Grassland and Environmental Research in Aberystwyth, which has found that grazing animals produce more omega-3 than housed animals.
Also, Heide Dorte-Matthes of the University of Rostock in Germany has shown that pasture-fed beef has three to four times as much omega-3 as intensively fed beef. The least favourable values were found in meat from animals raised on intensive feed lots in North America.
Witney, Oxfordshire, UK
