skydog 发表于 4-3-2014 10:06 AM 
请问有没有长期食入这些化学品的研究呢？还有，要如何去回应那些反对食用这些东西的论点呢？
在我提到的link里面就有。
Glyphosate
Animals
Researchers gave beagle dogs capsules containing 0, 20,100, or 500 mg/kg/day of glyphosate for one year. No effects were observed;
Male rats were fed a diet containing glyphosate at 89, 362, or 940 mg/kg/day and females were similarly fed at concentrations of 113, 457, or 1183 mg/kg/day for 2 years. In the high-dose female group, researchers observed decreased body weight gain. In the high-dose male group, researchers observed decreased urinary pH, increased evidence of cataracts and lens abnormalities, and increased liver weight. No effects were observed in the low-dose and mid-dose groups.
Humans
Researchers collected urine samples over 8 months from workers at two forestry nurseries where glyphosate was used for weed control. No glyphosate was detected in any of the 355 urine samples.
Five forestry workers sprayed glyphosate for 6 hours a day over the course of a week. No statistically significant differences were found in medical examinations and laboratory testing performed on the workers following pesticide application.
Researchers collected urine samples from farm families in South Carolina and Minnesota as part of the Farm Family Exposure Study. On the day of application, 60% of farmers had a detectable level of glyphosate in their urine of at least 1 ppb. The geometric mean of glyphosate detected was 3 ppb, with a maximum value of 233 ppb. Mean urinary concentrations of glyphosate were higher in farmers who did not use rubber gloves during application.31
Bacillus Thuringiensis
No complaints were made after eighteen humans ate one gram (g) of commercial B.t. preparation daily for five days, on alternate days. Some inhaled 100 milligrams (mg) of the powder daily, in addition to the dietary dosage . Humans who ate one g/day of B.t.k. for three consecutive days were not poisoned or infected
Single oral dosages of up to 10,000 milligram per kilogram (mg/kg) of body weight did not produce toxicity in mice, rats or dogs
No complaints were made by eight men after they were exposed for seven months to fermentation broth, moist bacterial cakes, waste materials, and final powder created during the commercial production of B.t.
There is no evidence of chronic B.t. toxicity in dogs, guinea pigs, rats, humans or other test animals. Thirteen-week dietary administration of B.t. to rats at dosages of 8,400 mg/kg did not produce toxic effects
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发表于 4-3-2014 09:31 AM
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