Our environment and behavior can add to our growth. Our physical body grows to show our aging. E.g wrinkles on the face, white hairs, walking steps. I agree with you that old age is indeed a blessing. Living up to the age of 90 is a huge blessing. If someone dies at that age, people see it as a celebration of life.
To be able to live to that old age, maintaining good balance diet, not junks, and engaging in exercises will help manage old age. Success to you.