There is a distinct correlation between comb size and bone mass in hens laying more eggs as researchers put it.
bone mass
Taking Vitamin E Supplements Lower Bone Mass, Fracture Risk Is Enhanced – Study
Vitamin E, which occurs naturally in cereals, nuts, olive oil and egg yolks, is credited with helping hold back the hands of time by ‘fighting aging from within’.
Calcium For Children : How Much Do They Need?
Children have a very active life, from the moment they start to crawl until the time they reach adolescence. They engage in rigorous physical activities such as running, jumping, climbing, etc.