| | Family Health | Toddlers Health What is the healthy amount of phosphorus a 14-year-old should take each day? According to the National Institutes of Health (NIH), the recommended daily intake of phosphorus for a 14-year-old is 1,250 milligrams. Toddlers Health - Related Articles Herbs for Cellulite Can temporal lobe seizures cause sudden drop in blood sugar or pressure? Can a blood test predict flu virus or cold? Eosinophilic Folliculitis HIV Symptoms Grief Camp Activities How to Take Liquid Milk Thistle Is Your Vacuum Cleaner Making Allergies Worse?