No. In fact, some berries are actually poisonous. You can safely eat about 1 out of 10 types of white and yellow berries, 1 out of 2 types of red berries, and 9 out of 10 types of berries that are blue, purple, or black.
In general, you should avoid consuming any berry found in the wild unless you can confidently identify it. Some types of berries are quite common, such as holly berries are commonly used in Christmas decor, yet they’re poisonous to both people and animals if eaten. Likewise, mistletoe berries are poisonous and can cause organ damage to your heart, kidneys, or stomach. Additionally, ivy berries — which grow on poison ivy — should be avoided not only due to the dangers of eating the berries but also the itchy rash that comes with contact with the plant’s leaves.