| Document And Entity Information | Sep. 21, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | FitLife Brands, Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Sep. 21, 2023 |
| Entity, File Number | 000-52369 |
| Entity, Incorporation, State or Country Code | NV |
| Entity, Tax Identification Number | 20-3464383 |
| Entity, Address, Address Line One | 5214 S. 136th Street |
| Entity, Address, City or Town | Omaha |
| Entity, Address, State or Province | NE |
| Entity, Address, Postal Zip Code | 68137 |
| City Area Code | 402 |
| Local Phone Number | 884-1894 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | FTLF |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001374328 |
