Regarding the yellowing, are you noticing it anywhere else, such as your skin? I found this from the Intelihealth site, about beta carotene, so this is probably what is causing the yellow "output":
Quote:
Warnings:
Do not take large doses of beta-carotene unless your doctor told you to.
Possible side effects: Some side effects are not serious. However, tell your doctor if these bother you or do not go away: More common -- Yellowing of palms, hands, soles of feet, or face (this may be a sign that your dose of beta-carotene as a dietary supplement is too high) Rare -- Diarrhea; dizziness; joint pain; unusual bleeding or bruising Also tell your doctor if you have any other side effects.
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Dr Weil says beta carotene is a safe form of Vitamin A, which is good news at least.
Quote:
The form of vitamin A I recommend in our Vitamin Advisor is beta-carotene PLUS other mixed carotenoids. The body can make all the vitamin A it needs from beta-carotene, which is not toxic, unlike the animal forms of vitamin A. Carotenoids are plant pigments found in orange and yellow fruits and vegetables and dark leafy greens. Unlike vitamin a, beta-carotene is water-soluble and does not accumulate in the body (although very high intakes – 100,000 IU or more a day -- can cause an orange tint to your skin). Aside from being unsightly, this side effect is innocuous.
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Oh, this reminds me of when I was a kid... I was hooked on Spaghettios, ate them every day for lunch. Mom used to tell me that I would turn orange if I didn't stop eating them so much and I thought she was kidding. But I did, my face turned orange, being darkest around my mouth!