Can anyone who is 25 or older still can increase his height?

Yes! "Scientifically speaking, the universal notion that at or about the age of 24 the joints have attained their permanent condition of growth is now seen to have been erroneous." Anthropologists of the noted Smithsonian Institute said.

Recent evidence was confirmed by the noted anthropologist, Dr. Ales Hardlickas, indicating that growth can continue until age 40 or shortly thereafter.