Since it's summer, I've been wanting to shed a few pounds so I've been replacing a meal with a nutritious smoothie. I try to make a new one everyday so I won't get sick of it. I collected all the smoothies I have made in this link. Click on the link to view! :) The question I have is, is this a safe diet? Thank you!
Obviously the idea is that you will lose weight by having a calorie deficit (i.e. that the smoothies will have less calories than the amount required to maintain your current weight).
Now lets look at the nutrition. Fruit is a favourite ingredient in smoothies. Beyond that, ingredient inclusion is somewhat 'random'.
1) Are you getting enough servings of vegetables? Possibly not.
2) to avoid muscle loss, protein intake should be at least 0.5g per pound of body weight. Even though there are some dairy ingredients in your smoothies, I doubt it. One way to remedy this would be to use Whey Powder (it also happens to create wonderfully creamy fruit smoothies). You don't need too much. Alternatively add beans to the diet etc.