LOL.The glutathione is just plain nasty! I was doing collagen and glutathione together with the lemon juice but it was just too much to handle. I haven't tried lime, lemon is a little bit sweeter than lime, I think, and I use almost a whole lemon...and down it like a shot. I don't like putting the collagen into smoothies all the time because you should take it on an empty stomach more often than with food, so the lemon juice works well for me first thing in the morning right before my coffee, I use 2 tbsp. collagen, and then later when I break my fast, I will have another tbsp. in a smoothie.