18301
Sixty two healthy older men and women were randomly assigned to one of three meal groups : no meal , high - fat meal or low - fat meal ; each was given a monthly 50 , 000 IU vitamin D ( 3 ) supplement with the test breakfast meal ( or after a fast for the no - meal group ) and followed for 90 days .
 vitamin D ( 3 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 vitamin D ( 3 )