The healthiness of a smoothie depends on various factors, including the ingredients and portion sizes used. Both water and almond milk can be used as bases for smoothies, and their impact on healthiness can vary. Water is a low-calorie option and can help keep the smoothie's overall calorie content lower, which can be beneficial for those watching their calorie intake. Almond milk, on the other hand, adds creaminess and can contribute to a richer flavor profile. However, it's important to choose unsweetened almond milk to minimize added sugars. Ultimately, the healthiness of a smoothie is determined by the overall balance of ingredients, including fruits, vegetables, protein sources, and any additional sweeteners or additives.