While it's unlikely for boys to experience significant height growth after 21, it's not entirely impossible.
Here's a breakdown:
- Growth Plates: Bone growth in length occurs at areas called growth plates (epiphyses).
- Closure of Growth Plates: For most men, these growth plates are closed by the age of 21. This means the bones generally stop increasing in length.
- Rare Exceptions: Although most growth ceases by 21, there can be exceptions where some individuals might experience slight growth into their early twenties, albeit minor.
The reference explicitly states:
Although some men may continue to grow in their 20s, most men's growth plates are closed by 21 years. Hence, it is unlikely for men to grow after 21 years, with some exceptions. In a healthy growth pattern, your bone increases in length due to the growth plates in the bone called epiphyses.
In short: While minor growth may happen in the early 20s for some, significant height increases are not typical for men past 21.
