Track TB4‑Sulfoxide in Peptimes™
TB4-Sulfoxide is thymosin beta-4 with its methionine oxidized to methionine sulfoxide. A 1999 study found that monocytes make it in the presence of glucocorticoid hormones. (Source: PubMed.)
Is TB4-Sulfoxide FDA-approved?
No. TB4-Sulfoxide isn't FDA-approved, and Drugs@FDA lists no application with it as an active ingredient.
TB4-Sulfoxide
Also: thymosin beta-4 sulfoxide, Tβ4-SO
- Status label in the Peptimes Library
- Not FDA-Approved
- Routes in Peptimes
- SubcutaneousIntramuscularOralSublingualNasalTopicalOther
- Updated
- 1 Nov 2026
US regulatory status
What studies have looked at
Each point says who or what was studied and what the study reported, with its source and the date we checked it. These are findings from the sources cited, not advice or a promise of any result.
- In animals or the lab
In lab tests, thymosin beta-4 sulfoxide inhibited neutrophil chemotaxis. In mice it strongly inhibited inflammatory paw swelling, while the non-oxidized form did not.
Source: PMID 10581087, checked 1 Nov 2026
- In animals or the lab
In wounded zebrafish it triggered the clearing of inflammatory macrophages from the injury, an effect the authors also saw in mice after heart injury. In cultures of human immune cells it lowered interferon-γ.
Source: PMID 23820300, checked 1 Nov 2026
How to track it in Peptimes
Add TB4-Sulfoxide in My Protocols and set the schedule you already follow: days of the week, times of day and a start date. Peptimes never suggests an amount when you log or schedule a dose. Its Library entry shows the status label “Not FDA-Approved”. It is a separate Library entry from TB-500.
- Routes: the app lets you record whichever route you used; none is established. Its routes are subcutaneous, intramuscular, oral, sublingual, nasal, topical and Other.
- Logging: the amount you took, the route and how you feel.
- Injection sites: subcutaneous and intramuscular doses record the site, and Insights shows where you’ve injected and how recently. It never suggests where to inject next. Other routes skip this step.
- Reminders and history: reminders at your times, Dose History, the Calendar and CSV or JSON export work as described on the peptide tracker app page.
Peptimes is a tracking app, not medical advice. Talk to a licensed clinician about your treatment. Peptimes doesn’t sell TB4-Sulfoxide or any other compound.
More sources
- FDA, Global Substance Registration System, Thymosin beta-4, checked 1 Nov 2026: the sequence of the unoxidized peptide. The registry has no separate record for the sulfoxide.
- NIH, ClinicalTrials.gov, search for thymosin beta-4 sulfoxide, checked 1 Nov 2026: no registered study.