Yes carrot juice would be good for bodybuilding as it is low in sugar and high in vitamins. I am no expert but would think that if you made a smoothie of carrot juice, bananas and spinach that would be a great all round drink, giving many nutritional benefits. Carrot juice alone has a strong flavour so this mixture would also help. Perhaps add apples too. By the way the best juices for relief of muscle pain from weight lifting are either pineapple or cherry. You may care to read this website – http://muscle4hardgainers.com/top-reasons-why-you-should-drink-smoothies-everyday/ Remember juiced carrots are better than raw whole carrots!