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Food Biotechnology Ethics. Clark Ford, Ph.D. Food Science and Human Nutrition Iowa State University. What is Food Biotechnology?. Food technology based on biology Ancient food biotechnology: Fermentation by microbes Cheese Beer Wine Bread Modern food biotechnology Tissue culture
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Food Biotechnology Ethics Clark Ford, Ph.D. Food Science and Human Nutrition Iowa State University
What is Food Biotechnology? • Food technology based on biology • Ancient food biotechnology: • Fermentation by microbes • Cheese • Beer • Wine • Bread • Modern food biotechnology • Tissue culture • Genetic engineering • Different from plant and animal breeding
Genetic Engineering • Genetic Engineering involves manipulating DNA molecules • DNA from one species is spliced into the DNA of another species • Called: Recombinant DNA • Genetically Engineered organisms are called: • Genetically Modified • Transgenic
Milestones in Food Biotechnology • 1953: Structure of DNA discovered • 1973: First gene cloned • in microbes • 1977: Asilomar Conference in USA • Recombinant DNA safety • Regulation • Risk assessment • Containment
Milestones in Food Biotechnology • 1990: Recombinant Chymosin Approved by FDA • Enzyme for cheese making • Originally from calf stomach • Bovine gene expressed in GRAS microbes • In 80% of U.S. cheese • “Vegetarian” cheese in England
Other Products from Genetically Engineered Microbes • Food enzymes • Bread • HFCS Sweeteners • Amino acids • Peptides • Nutrasweet • Flavors • Organic acids • Polysaccharides • Vitamins
Milestones in Food Biotechnology • 1994: FDA approves “Flavr Savr” Tomato • Prolonged shelf life • Improved quality • Voluntarily labeled
Other Genetically Engineered Plants • Agronomic traits • BT Corn • Roundup Ready Soy • Disease Resistance • Food quality • Nutrition • Metabolic products • Vaccines
Bt Corn • Natural insecticide from Bacillus thuringiensis • Non-toxic to humans • Target insect: corn borer • Potential to: • reduce insecticide use • reduce mycotoxins • 40% U.S. Corn crop Bt (2006)
Bt Concerns • Bt pollen harms non-target species? • Bt crops select for resistant insects • Bt pollen can drift to organic fields • Food system failed to keep BT Starlink corn out of human food products
Herbicide Resistance • Roundup Ready Soy, Corn, Canola • Allows post-emergence herbicide spraying • Increases yield • Facilitates no-till farming • 89% U.S. Soy crop (2006)
Herbicide Resistance Concerns • Encourages herbicide use • Groundwater contamination • Kills beneficial soil microbes • Cross-pollinates weeds • Fosters dependence on Agrochemcial companies
Disease Resistance • Canola • Cantaloupes • Cucumbers • Corn • Rice • Papaya • Potatoes • Soybeans • Squash • Tomatoes • Wheat Genetically engineered papaya resistant papaya ringspot virus
Health and Nutrition • Golden Rice • Vitamin A and Iron enhanced • Seeds given to the poor for free • Improved Amino Acid Balance for Soy, Maize • Banana Vaccines
Milestones in Food Biotechnology • 1999: GM corn and soybean products are present in 80% of processed foods in USA • Corn: • starch, high fructose corn syrup, oil • Soy: • oil, Lecithin, protein
Milestones in Food Biotechnology • 1999: European Union requires GM labels, blocks import of GMcorn, beans • Ban lifted 2004 but no change in anti-gm sentiment in Europe
Milestones in Food Biotechnology • 1999: Gerber and Heinz baby foods GM-free • 2000: Mc Donalds and Frito-Lay products GM-free
Milestones in Food Biotechnology • 2000: USDA Organic Foods Standards • Must be GM-free
Milestones in Food Biotechnology • 2005: 222 million acres worldwide • Planted in Genetically modified crops • 55% in USA • Soy • Corn • Cotton • India, China • Canola http://www.isaaa.org/kc/bin/briefs34/es/index.htm http://www.newscientist.com/data/images/archive/2483/24833301.jpg
Controversy over Biotech Foods • Debate pits consumer and ecology groups against Multinational Corporations • Many farmers, scientists, government agencies caught in the middle
Potential to: Increase productivity Increase purity Increase safety Improve nutrition Improve food quality Improve sustainability Benefit ecosystem Process not inherently harmful Similar to traditional Plant and Animal breeding Unless misused, outcome expected to be beneficial Is a powerful technology that could help humanity Bad ideas weeded out by the market, regulation, lawsuit Arguments for Genetically Engineered Food --Paul Thompson
Arguments against Genetically Engineered Foods • Potential safety risk for humans • Unintended Consequences • Genetic Engineering is playing God • Not Natural to move genes between species • Potential safety risk for environment • Could spread • Genetically Engineered label not required in U.S. • Benefits multinational corporations • not consumers or developing nations
Frankenstein Foods: Unintended Consequences? • Random gene insertion • Toxicity • New gene products? • Allergies • Eating DNA!
Arguments for Labeling • Not Substantially equivalent to non-GM • Must use Precautionary principle • Is uncertainty in risk assessment • Labeling indicates process used • Consumer’s right to know and choose • Country’s right to know and choose
Arguments against labeling • Suggests non-existent hazard • Expensive to segregate crops and change labels • FDA labels required if change in: • Allergenicity • Nutrition • Food Quality
Will it Feed the World? • Disease resistance will benefit developing nations • Technology requiring increased inputs benefits wealthy, multinationals, plantations • Small, subsistence farmers can’t compete, lose land • Inequity, poverty increase • Thus more food and more hunger • Green Revolution unsustainable