v3.26.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 14, 2026
Document Information Line Items    
Entity Central Index Key 0001795091  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-42195  
Entity Registrant Name OS THERAPIES INCORPORATED  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-5118368  
Entity Address, Address Line One 115 Pullman Crossing Road  
Entity Address, Address Line Two Suite 103  
Entity Address, City or Town Grasonville  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 21638  
City Area Code (410)  
Local Phone Number 297-7793  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol OSTX  
Security Exchange Name NYSEAMER  
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  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   44,538,106
Amendment Flag false  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31