v3.26.3
Cover - shares
 6 Months Ended
Jun. 30, 2026
Sep. 21, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-41488  
Entity Registrant Name SHUTTLE PHARMACEUTICALS HOLDINGS, INC.  
Entity Central Index Key 0001757499  
Entity Tax Identification Number 82-5089826  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 401 Professional Drive  
Entity Address, Address Line Two Suite 260  
Entity Address, City or Town Gaithersburg  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 20879  
City Area Code (240)  
Local Phone Number 403-4212  
Title of 12(b) Security Common Stock, par value $0.00001 per share  
Trading Symbol SHPH  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   4,764,696