I take spirulina and it's great for me. I also have used wheat grass but for me spirulina is better. I've not had any of the things that others in here mention.

It does taste a bit ordinary - you can make a smoothy with some LSA, yoghurt and berries and that makes a very nutritious drink that tastes yummy. Or as someone else said just down it fast with a chaser of water!

I recommend it personally.