3-Hydroxypropionic acid and methylcitric acid are not reliable indicators of marginal biotin deficiency in humans.
 
																	
																		
																	
																		
																	
																	
																		
																	
																		
																	
																	
																			
																					
    Mock DM, Henrich-Shell CL, Carnell N, Stumbo P, Mock NI. 3-Hydroxypropionic acid and methylcitric acid are not reliable indicators of marginal biotin deficiency in humans. J Nutr. 2004 Feb; 134(2):317-20.