Generally, most people don't grow taller after the age of 18 to 20, but there are exceptions.
Why Height Changes Typically Stop After 20
For most individuals, the growth plates in their bones, which are responsible for height increases, close around the age of 18 to 20. Once these growth plates have fused, further height increases through bone lengthening are no longer possible.
Exceptions to the Rule
Although uncommon, there are situations where someone could potentially grow taller after 20:
- Delayed Growth Plate Closure: According to studies (36, 37), some people experience a delayed closure of their growth plates. If these plates remain open past the typical age range of 18-20, height increases can still occur. This is, however, an infrequent situation.
- Gigantism: While rare, conditions such as gigantism can cause excessive growth due to the overproduction of growth hormone. Gigantism usually starts in childhood, but its effects can extend beyond the typical growth years.
Summary
| Factor | Typical Outcome | Exception |
|---|---|---|
| Growth Plate Closure | Closes around 18-20, stopping height gain | Delayed closure allows for continued growth |
| Hormonal Conditions | Normal growth patterns | Gigantism (excess growth hormone) can lead to continued height increase, but this is a pathological, and relatively rare, condition. |
In conclusion, while most people won't experience height increases after their early twenties, exceptions related to delayed growth plate closure or certain medical conditions (like gigantism) can lead to further growth.
