Over-the-counter multivitamins are available in drop form for infants. Beginning in the first two months of life, a minimum of 200 IU of vitamin D per day promotes optimal baby development, Greer tells WebMD. This should continue throughout childhood and adolescence.
A kidney stone, also known as a renal calculus or nephrolith, is a solid piece of material which is formed in the kidneys from minerals in urine.Kidney stones typically leave the body in the urine stream, and a small stone may pass without causing symptoms.rinary stones are typically classified by their location in the kidney (nephrolithiasis), ureter (ureterolithiasis), or bladder (cystolithiasis), or by their chemical composition (calcium-containing, struvite, uric acid, or other compounds).
Some stones grow very large and fill the entirety of the kidney collecting system. They are called staghorn calculi (calculus = stone) because they look like antlers. While most kidney stones are made up of calcium oxalate crystals, this type of stone is a composite of struvite, carbonate, and apatite. They are usually the result of recurrent urinary tract infections, in which the bacteria produce ammonia, allowing chemicals in the urine to form the nidus for stone formation.