Cut off two bottom leaves off the aloe vera plant – the leaves all the way at the bottom of the aloe plant are the most mature and will contain more pulp.
Once cut, place them in a bowl with the cut side down so that the resin will drain. This resin can stain the skin and also irritate it, so leave it to dry for about 10 minutes.
Once the resin has drained, go ahead and peel the leaves using a vegetable peeler of a knife. If using a knife, make sure to be careful not to cut yourself, and always slice away from your body. Peel off both sides of the leaves, which will leave you with only the gel part of the aloe.
Using a small spoon, scoop out all of the gel from the leaf. The gel should easily come off with a spoon. Place the gel into a bowl.
If you intend to make a bigger batch, consider adding a natural preservative. This will ensure that your aloe vera gel will keep for a month or two. Mix in 500mg of powdered vitamin C or 400iu vitamin E for every 1/4 cup of gel. Place all ingredients in a blender and blend until smooth.
If you're not using a preservative, the gel will keep for a week or two. In either case, the aloe vera gel should be kept in a clean, airtight jar or container in the refrigerator.