Although avocado is a very healthy and nutritious food, it may cause certain side effects in people who take it on a regular basis. Some people can develop a certain allergic reaction to avocados. These people are also known to be allergic to bananas, peaches, melons, potatoes, tomatoes and kiwi. There are many variants of avocados available in the market and some of them may cause damage to the liver when taken on a regular basis. Because of avocados, collagen tends to accumulate in the liver. To stay clear of this side effect, be sure that you’re eating only the finest kind of avocados available. If you decide to add avocado to your diet, be sure to cut on calories somewhere else. Avocado is fairly high in calories because of its equally high fat content. It was also noted that because of avocado’s antiinflammatory effect, blood thinning medications may not work as much. Patients who are on statins/ aspirins should consume avocado in limited doses.