Milk is the cheapest source of protein. Powdered milk is much more affordable than fresh milk, and has the advantage of not needing refrigeration. You can therefore keep a box at work. Go for larger packs and low fat versions, which are more economical. Buy yogurt in big pots and compare the price per 100g on supermarket labels to make the best choice. When it comes to cheese, the only economical variety is own brand cheddar. Note that most cheeses can be frozen.
The last tip to save even more is to plan meals depending on supermarket offers and what you find in your fridge and your pantry, to reduce waste. Did you know that between 15-25% of food purchases end up in the bin each week?
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