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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 28, 2022
Jun. 30, 2021
Document and Entity Information      
Entity Registrant Name Annovis Bio, Inc.    
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
Entity File Number 001-39202    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 26-2540421    
Entity Address, Address Line One 1055 Westlakes Drive, Suite 300    
Entity Address, City or Town Berwyn    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19312    
City Area Code 610    
Local Phone Number 727-3913    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol ANVS    
Security Exchange Name NYSE    
Entity Current Reporting Status Yes    
Entity Well Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
Entity Shell Company false    
Entity Public Float     $ 481,819,080
ICFR Auditor Attestation Flag false    
Entity Common Stock, Shares Outstanding   8,163,923  
Entity Central Index Key 0001477845    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name WithumSmith+Brown, PC    
Auditor Location East Brunswick, New Jersey    
Auditor Firm ID 100