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The National Academy of Sciences (...) has concluded there is no safe level of trans fat consumption. There is no adequate level, recommended daily amount or tolerable upper limit for trans fats.

V'nishmartem meod l'nafshoseichem! How can kashrus-organizations endorse percentages that many governments have forbidden?

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  • @ShmuelBrin That doesn't justify (implicit) endorsement.
    – Adám
    Aug 6, 2013 at 22:23
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    Why do you interpret kashrus certification as a recommendation to consume the product?
    – Double AA ♦
    Aug 6, 2013 at 22:46
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    Evaluating claims in the realm of dietary science is not among the areas of expertise claimed by kashrut certification organizations. They also (generally) don't claim expertise in, and therefore don't certify companies for, matters of business ethics, even though these are also regulated by Halacha. We have other experts (scientists and our own doctors) for determining the health effects of trans fats and we have other means of determining which products contain how much trans fats (government-mandated labeling).
    – Isaac Moses ♦
    Aug 7, 2013 at 3:07
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    @NBZ Do they check that the company didn't steal the food? I don't know that any major kashrus organizations do that, yet it would make the food very prohibited to buy (CM 356:1).
    – Double AA ♦
    Aug 7, 2013 at 6:25
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    @IsaacMoses I agree that none of those things are usually areas of expertise claimed by the organizations, but that doesn't mean they couldn't be. I'd prefer the Hechsher to tell me I can buy it and eat it, not that I don't violate a prohibition of Maachalot Asurot. They're now doing only half the work.
    – Double AA ♦
    Aug 7, 2013 at 7:37

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Since eating one unit of the item in question will not cause you to get sick there is no Issur. I am basing this on a reply I got from a Dayan when I asked him if it was permitted to provide a lighter to a smoker when requested.

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    Just like a diabetic doesn't make bracha acharona on sugary foods if the large amount harms him. Mashehu doesn't, and therefore requires a bracha.
    – Adám
    Aug 7, 2013 at 13:43
  • What about the poskim who say that smoking is assur?
    – user3318
    Dec 20, 2013 at 21:30
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    @NBZ I just heard your comment today in the name of Reb Elyashiv OB"M.
    – eramm
    Jul 22, 2014 at 8:48

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