Middle Layer: This layer of the aloe vera leaf is found underneath the rind and houses the bitter-tasting yellow sap known as aloe latex or aloin. It’s yellow in color and has a bitter taste. Aloe latex, or juice, seeps from the leaf when cut. Carefully follow the dosage information when taking aloe vera gel or latex internally. When ingesting aloe, the gel is the safest part of the plant. After a few weeks of use, take a break for at least one week. Limit your use to small periods of time. History of Aloe Vera. Aloe latex can cause some side effects such as stomach pain and cramps. The Aloe Vera plant produces two substances in its leaf, the first one is the gum/ gel which is sticky and transparent in nature and is found inside the inner side of the aloe vera plant leaf and the other part is the aloe latex, which is found inside the … Aloe is a latex plant and the allergy is called an aloin allergy. The latex has laxative properties and can cause serious health complications if used too often. Taking aloe latex 1 … Long-term use of large amounts of aloe latex might cause diarrhea, kidney problems, blood in the urine, low potassium, muscle weakness, weight loss, and heart disturbances. Many aloe gels have not done enough to keep the latex portion of the plant out of their gels, and as such many people react to aloe vera in their skin care products. This sticky substance contains anthraquinones, which are compounds that have a laxative effect.