Consider the following factors when shopping for milk alternatives: Calcium content: Choose a milk alternative that has at least 120g of calcium in every 100 ml or 3.4 ounces. Added sugar: Go for the unsweetened brands rather than those loaded with flavors. Take note and avoid those with sugar as one of their top three ingredients. Cost: Compare several brands and consider picking the one that is most nutritious but at an economical cost.  Vitamin B12: Look for brands that include vitamin B12 among their ingredients. Vitamin B12 occurs naturally in milk and is essential for a strong immune system and a healthy brain.