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Thread: Does caffeine stop absorption of vits and mins?

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  1. #1
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    Does caffeine stop absorption of vits and mins?

    I take my supplements mid-morning (an hour or two after my coffee) because I've heard that caffeine inhibits the absorption of vitamins and minerals.

    True or false?
    "I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.

    In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."

    - Ray Peat

  2. #2
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    Not sure but I do the same thing. I think it's because I heard that coffee causes your stomach to eliminate it's contents quicker than usual so it's best to avoid drinking coffee while eating.

    I kind of took that as well.. if the vitamins aren't being broken down fully in my stomach they won't be absorbed in my intestines as well as they should be. Intuitive thinking but I could be totally wrong.

  3. #3
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    Only iron, and this is hardly a bad thing. I slam down supplements with coffee and can feel their effect in minutes. Your digestion plays a big part in how quickly you absorb supplements, so, theoretically, coffee can only help with this.
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    Quote Originally Posted by Derpamix View Post
    Only iron, and this is hardly a bad thing. I slam down supplements with coffee and can feel their effect in minutes. Your digestion plays a big part in how quickly you absorb supplements, so, theoretically, coffee can only help with this.
    Quote Originally Posted by JesseJe View Post
    Not sure but I do the same thing. I think it's because I heard that coffee causes your stomach to eliminate it's contents quicker than usual so it's best to avoid drinking coffee while eating.

    I kind of took that as well.. if the vitamins aren't being broken down fully in my stomach they won't be absorbed in my intestines as well as they should be. Intuitive thinking but I could be totally wrong.
    Two completely opposing views...both make sense. In one sense, caffeine speeds up metabolism, thereby increasing absorption. In another sense, caffeine aggravates the intestinal wall, thereby causing faster elimination of only-partially digested matter.

    I know which theory I prefer... but which is true?

    Derp, how does coffee prevent absorption of iron, but not other minerals?
    "I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.

    In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."

    - Ray Peat

  5. #5
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    Quote Originally Posted by YogaBare View Post

    Derp, how does coffee prevent absorption of iron, but not other minerals?
    It's the polyphenol compounds in coffee and tea that can impede absorption of iron when ingested at the same time

    Inhibition of food iron absorption by coffee.
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  6. #6
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    Quote Originally Posted by Derpamix View Post
    It's the polyphenol compounds in coffee and tea that can impede absorption of iron when ingested at the same time

    Inhibition of food iron absorption by coffee.
    Interesting. I did a bit of research and a ton of sites (credible ones, like LiveStrong, Men's Health, and Vegan Health Guide ) all claimed that caffeine blocked calcium absorption. I found the study they cited: Effects of caffeine on bone and the calciu... [Food Chem Toxicol. 2002] - PubMed - NCBI

    First line:
    Caffeine-containing beverage consumption has been reported to be associated with reduced bone mass and increased fracture risk in some, but not most, observational studies.

    ....The negative effect of caffeine on calcium absorption is small enough to be fully offset by as little as 1-2 tablespoons of milk......

    There is no evidence that caffeine has any harmful effect on bone status or on the calcium economy in individuals who ingest the currently recommended daily allowances of calcium.

    I guess for vegans it would be a problem, but the rest of us should be ok
    "I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.

    In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."

    - Ray Peat

  7. #7
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    Quote Originally Posted by YogaBare View Post
    Interesting. I did a bit of research and a ton of sites (credible ones, like LiveStrong, Men's Health, and Vegan Health Guide ) all claimed that caffeine blocked calcium absorption. I found the study they cited: Effects of caffeine on bone and the calciu... [Food Chem Toxicol. 2002] - PubMed - NCBI

    First line:
    Caffeine-containing beverage consumption has been reported to be associated with reduced bone mass and increased fracture risk in some, but not most, observational studies.

    ....The negative effect of caffeine on calcium absorption is small enough to be fully offset by as little as 1-2 tablespoons of milk......

    There is no evidence that caffeine has any harmful effect on bone status or on the calcium economy in individuals who ingest the currently recommended daily allowances of calcium.

    I guess for vegans it would be a problem, but the rest of us should be ok
    Yeah, usually that's the kind of trite nonsense you'll find when you research the harmful effects of coffee, because it really doesn't exist. ^-^

    30 Reasons to Quit Coffee

    Read this and have a good laugh, I know I did.
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  8. #8
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    I know caffeine can effect iron absorption quite a bit, though if you eat plenty of animal products, this is nothing to worry about. As for other nutrients, I am not as sure. My two cents is that I am drinking a fair amount of tea with meals these days and I still feel pretty good, so probably not as much.

  9. #9
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    Coffee only really has one benefit aside from being a "pleasure drug of addiction" and that is stimulating the release of Free Fatty acids through increasing stress, so if you aren't downing your coffee and then immediately going into a hard workout, then it really has no benefits and is pretty much detrimantal and yes the caffeine does affect the absorption of a variety of nutrients.

    Argueing that coffee is healthy is a relative argument, healthier than what.
    It's like the "Whole grains are healthier than processed grains" argument, but no grains are 100 times healthier.

    I do like my coffee and drink it daily, but don't delude myself, it is definately part of the 20% non primal.

  10. #10
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    Quote Originally Posted by Omni View Post
    Coffee only really has one benefit aside from being a "pleasure drug of addiction" and that is stimulating the release of Free Fatty acids through increasing stress, so if you aren't downing your coffee and then immediately going into a hard workout, then it really has no benefits and is pretty much detrimantal and yes the caffeine does affect the absorption of a variety of nutrients.

    Argueing that coffee is healthy is a relative argument, healthier than what.
    It's like the "Whole grains are healthier than processed grains" argument, but no grains are 100 times healthier.

    I do like my coffee and drink it daily, but don't delude myself, it is definately part of the 20% non primal.
    In before Derp gets crazy.

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