Flushing is a common side effect from taking high levels of which nutrient? umuc

The answer is Vitamin B3 (also called Niacin). To reduce flushing, it is recommended to take it in increasing doses. Its uptake in large quantities reduces cholesterol levels of the body and therefore, reduces the levels of cardiovascular diseases. However, these large quantities could also cause gastro intestinal complications, liver damage and glucose intolerance.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.