yellow urine is common with higher vitamin C intakes + its surely a beneficial water soluble nutrient that gets excreted + needs to be taken several times daily as the pros note. only vitamins A,D,E, + K are fat soluble + only absorbed when taken with fat + a simple tablespoon of real peanut butter or other small amounts of fat is needed for absorption. many ill advised posters need to do some time consuming extensive research not what big medial shows you!! a little note on fish oils, they contain EPA + DHA, the latter is said to be best for brain health + is usually the lesser portion as it costs more. theres even prescription fish oils, Lovasa being one my aunt took until her insurance did not cover the cost!!! for her it was the fish oil that dropped her tryglycerides that comes from carbohydrates NOT fat consumption!!