| Document And Entity Information | Feb. 23, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | FitLife Brands, Inc. |
| Document, Type | 8-K/A |
| Document, Period End Date | Feb. 23, 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 | 991-5618 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Description | Form 8-K/A Amendment No.1 |
| Amendment Flag | true |
| Entity, Central Index Key | 0001374328 |
