What is the life expectancy of a reindeer?

In the wild, reindeer typically have a lifespan of 12-15 years. However, some captive reindeer have been known to live up to 20 years. The main factor that affects the lifespan of a reindeer is the environment in which it lives. Reindeer that live in harsh conditions, such as the Arctic tundra, have a shorter lifespan than those that live in more temperate climates. The diet of a reindeer can also affect its lifespan. Reindeer that eat a diet that is high in protein and low in carbohydrates are more likely to live longer than those that eat a diet that is high in carbohydrates and low in protein.