question on smoothies

You can use them as a meal replacement if you make sure to get some protein in them. This can be in the form of greek yogurt or peanut butter, for example. So if you freeze a banana and put it in the food processor with a tbsp of peanut butter and a half cup of greek yogurt, and about a half cup of milk, that'll have fruit, protein, and dairy all at once and can be a decent breakfast. Personally I use regular cow's milk. Soy does not agree with me and coconut milk is too expensive.

You can use them as a meal replacement or snack, whichever. Like gothchiq said, though, be sure you add enough protein if you're making a meal replacement. I usually add 1 scoop of protein powder to mine, in addition to yogurt and [sometimes] peanut butter (depending on my flavor choice of the day). Frozen bags of berries are convenient, although you can find cheap fruit in the produce section and freeze it yourself to use later. I use unsweetened vanilla almond milk in my smoothies/shakes. I haven't found an unsweetened coconut milk in my area yet but I also haven't been looking very hard b/c almond milk is pretty cheap.