Discussion in 'Biology & Genetics' started by eddymrsci, Aug 2, 2004.
Why are human feces generally yellow in colour?
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Broken down proteins. Bilirubin is one source of pigmentation.
thanks blue, for the info
then what is happening when the feces appear dark yellow or generally darker in colour.
Then you have eaten too much chocolate. Please Register or Log in to view the hidden image!
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Several factors can cause that.
1. You might simply be eating less protein. You only need about 45 grams a day, which accounts for less than 400 calories. The rest of your diet can be anything that makes you happy and healthy.
2. You might be eating a lot of processed foods. Artificial coloring, and to a lesser extent natural dyes, often sail through the digestive tract without much attrition from chemical breakdown.
3. Other components of your diet are passing through without being totally digested. Even with that incredibly long small intestine, human digestion is remarkably inefficient. Some nutritionists claim that more than half the mass of complex nutrients we eat (anything bigger than a sugar molecule, which means pretty much everything else) is not digested. Individual results may vary greatly. Something as simple as not having enough bacterial culture in your intestines can exacerbate this -- which is easily corrected by adding yogurt to your diet. Still not all differences in individual digestion are easily explained. I eat about 3,500 calories a day, my life is not particularly active, yet I don't have a weight problem. (Don't envy me, nobody gets a perfect life and you wouldn't want to trade for some of my other health problems. Trust me on this.) Clearly a whole bunch of my food is not being digested and I have no idea why.
4. I'll say the following just because it would be irresponsible not to, but please don't overreact to it. Blood in your stomach will make your stool darker, even black. This can come from a fondness for raw or rare meat, or the blood soup that is a delicacy on some Chinese menus. Or it can come from bleeding ulcers. It happened to me so I had to give up aspirin, ibuprofen, and all non-steroid anti-imflammatory drugs (NSAID's). Now I get to take Darvon, which is a nice high, so I'm not complaining. If you have really dark stools, and I mean literally black, see your doctor right now. But what you've described doesn't fit this category.
Is it not brown?!
Sounds like you have something of a 'pale' stool eddymrsci Please Register or Log in to view the hidden image!
Just to make you feel better about it here are some possible reasons for you shitting yellow.
Celiac Disease, Cholangitis, Cholecystitis, Gallstones, Giardia intestinalis infection, Hepatitis (all types) and a variety of Lipid malabsorption syndromes.
Hope this helps!
its true that a lot of faeces are yellow in colour as described by the pigmentation above but there are also black components in blood which mix to give brown Please Register or Log in to view the hidden image!
Stools - pale or clay colored
no actually this has nothing to do with my bowel movements, I eat healthy normal diets and my feces are perfectly normal as far as I am concerned, it was just a thought that popped up when I was in the washroomPlease Register or Log in to view the hidden image!
but thanks for the responses
If you don't want to die then you'd better see a doctor...
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