详细法规自己查http://www.inspection.gc.ca/
唯一regulated的词就是organic。但是organic的条件比你想象要松的多。比如
6.7.3 Where preventive practices and vaccines are inadequate to prevent sickness or injury and where disease and health problems require treatment, the use of biological, cultural, and physical treatments and practices is permitted, in accordance with CAN/CGSB-32.311, Organic Production Systems - Permitted Substances Lists.

我买肉时比较注意的是荷尔蒙和抗生素两项。认证的Organic 比较贵，我有时在Farmers Market 买，有些小规模的农场没有能力做认证但坚持不用荷尔蒙和抗生素，他们的价格比大型超市好一些。和Farmer聊天时听说一般是在牛的耳朵里放荷尔蒙，两块钱的荷尔蒙可以带来35块钱的利润。

本文发表在 rolia.net 枫下论坛CANADIAN FOOD INSPECTION AGENCY, University of Guleph-FOOD SCIENCE NETWORK. 但总结最简练的是YORK UNIVERSITY 的一个PDF文档-Healthy Measures: Hormones and Antibiotics in Food Production。为方便大家，我复制在下面了。尽管也看见了有一些网上争论-industry practice，我的结论，放心使用。


Healthy Measures: Hormones and Antibiotics in Food Production
March is Nutrition Month! This year’s theme is Celebrate food…from field to table. During March, the Healthy Measures E-bulletin will feature various topics related to this theme. Today’s topic is the use of hormones and antibiotics in food production.
Hormones
Hormones occur naturally in animals, plants and humans. The Canadian Government has approved the use of hormonal growth promoters by the Canadian beef industry. However, this use has not been approved for use with pigs, poultry or dairy cows.
Not all cattle producers use hormonal growth promoters. The use of growth promoters results in leaner meat, more growth using less feed and a reduced cost of production - which means less expensive beef for the consumer.
According to Health Canada and the US Food and Drug Administration, hormonal growth promoters are considered safe to use in beef production. When used correctly, the levels found in food products such as beef are too low to be considered a risk to human health.
Antibiotics
Health Canada has approved the use of antibiotics with dairy and beef cattle, hogs, sheep, chickens and turkeys.
Beef: Antibiotic residues in beef are extremely rare and recent residue testing by the Canadian Food Inspection Agency showed 100 per cent compliance. If residue levels were detected, the meat could not be sold.
Dairy: Milk from animals treated with antibiotics cannot be offered for sale until the withdrawal period has passed. Milk is checked for quality and composition when it is picked up at the dairy farm. It is always checked for antibiotics at the dairy processing plant.
Poultry: Only healthy birds are allowed in the Canadian food supply. Antibiotics may be used on the advice of a veterinarian to maintain the health of the flocks. Some antibiotics may be added to chicken feed to prevent illness or treat disease. Poultry farmers maintain strict records, called the “flock sheet”, which provides information about the birds and medication used. Withdrawal time must be recorded and this information is sent to the processing plant. Treated birds can not be marketed unless this information has been provided.
Pork: Antibiotics are sometimes used to support the health of pigs. The Canadian Food Inspection agency screens meat products for chemical residues, including antibiotics. It is very rare that residues are found in Canadian meat, but if any is detected, the affected meat is not sold.
For more information:
Dietitians of Canada – Nutrition Month
Chicken Farmers of Canada – Antibiotics: Your Questions Answered
Beef Information Centre – Antibiotic Use in Beef Cattle Industry
Dairy Farmers of Ontario - Quality
If you have questions on nutrition and healthy eating, contact EatRight Ontario at 1-877-510-更多精彩文章及讨论，请光临枫下论坛 rolia.net