No, overripe avocados are generally safe to eat, but you should avoid eating ones that are rotten or moldy. Here are the key points:
Overripe vs Rotten Avocados Overripe avocados are very soft and mushy when squeezed, but still edible if they don't smell or taste off. They may have some brown spots that can be cut away.
Rotten avocados, on the other hand, have a sour smell, dark stringy flesh, and mold growth, indicating they have spoiled and should not be eaten. Discard any avocados that smell sour or rancid.
Nutritional Changes As avocados ripen, their nutrient content doesn't change significantly. The healthy fats, fiber, vitamins and minerals remain intact even when overripe.
The texture becomes softer and easier to mash or purée when overripe, which can be desirable for certain recipes like guacamole.
Potential Risks Eating a small amount of overripe avocado is unlikely to cause any ill effects, but consuming large quantities may lead to digestive upset in some people due to the high fat content.
Individuals with latex allergies may be more prone to avocado allergies and should be cautious.