However, there are cases where the color may appear yellowish, sometimes referred to as âyellow spermâ or âyellow semenâ. The cause of yellow sperm is uncertain but it is believed that it can be caused by infection, or foods which are rich in sulfur such as garlic and onions.Another possible cause for yellow semen could be the natural thickening of semen; especially if you have not ejaculated for quite some time.he cause of yellow sperm is uncertain but it is believed that it can be caused by infection, or foods which are rich in sulfur such as garlic and onions.
Red dye or purple dye masks the lining of the colon and can interfere with getting accurate results. Here is a Top Five list of red and purple foods and drinks to avoid before your colonoscopy: Jell-OâAvoid strawberry, raspberry, cherry or black cherry and grape. PopsiclesâAvoid any red or purple in a variety pack. Try the natural frozen fruit bars made with real fruit juice.
The Family Health Guide. If you shudder at the thought of having a colonoscopy to check for hidden colon cancer, chances are it's the prep that's stoking your apprehension.he day before the colonoscopy. Don't eat solid foods. Instead, consume only clear liquids like clear broth or bouillon, black coffee or tea, clear juice (apple, white grape), clear soft drinks or sports drinks, Jell-O, popsicles, etc.