The present invention addresses the problem of providing a safe and novel powdered milk product which is useful in the prevention and treatment of various bone disorders such as osteoporosis, bone fractures, rheumatism, and arthritis when taken on a daily basis. A powdered milk product containing 1.4 to 24 mg/15 g of angiogenin and/or an angiogenin degradation product, and lactoperoxidase and/or a lactoperoxidase degradation product at a mass ratio of 0.35 to 10 relative to the angiogenin and/or angiogenin degradation product. It is possible to strengthen bones and to prevent and treat various bone disorders such as osteoporosis, bone fractures, rheumatism, and arthritis by taking said powdered milk product.
