7. Food Preservative 

Make your fruits taste fresh and last a few days longer. This tip is great for many other fruits as well. Add a bit of lemon juice to apples, potatoes and cauliflower to prevent them from browning. You’ll be able to enjoy your guacamole for longer too if you use lemon juice as a preservative. The acids kill harmful bacteria and slow down oxidation.

8. Teeth Whitener

This tip is well-known all around the globe. That’s one of the cheapest and most affordable methods of whitening teeth at home. You’ll need some lemon juice and soda. Prepare a paste and apply it on your teeth using a Q-tip. This method is harsh if used too often. Be careful and do not ruin your tooth enamel. The longest you can leave the paste on your teeth is no more than one minute. Thoroughly wash your mouth with warm water after the procedure.