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TB-500 Blueprint

A bold panel-by-panel digest of the TB-500 / thymosin beta-4 research record — what the actin-binding heptapeptide is, where its repair and neuro findings come from, and how compounded and regulatory access actually stands.

STUDY AMOUNTS / QUESTION 04

Is there an approved TB-500 dosage?

No. The animal tests and a Phase 1 safety check studied the full protein, leaving you without an approved schedule for the fragment.

What study amounts do and don't tell you about TB-500

What TB-500 amount can a doctor give you? None. There's no approved human amount. In rodent studies of full thymosin beta-4, middle amounts helped while higher ones failed [4].

In mice with muscle trouble, researchers used 150 micrograms of thymosin beta-4 twice a week [11]. In rat wound tests, as little as 10 picograms helped skin cells close a wound [3]. One picogram is one trillionth of a gram. Neither test predicts your result.

The only finished human test sent full thymosin beta-4 through a vein and into the blood. In that early Phase 1 safety test, doctors gave healthy adults 42, 140, 420, or 1260 milligrams each day for up to 14 days while watching for bad reactions [6]. Those adults had no major harm, but the test can't show whether the protein helps any illness.

The TB-500 dosage in research numbers don't apply to the sold fragment. You need to know that the fragment wasn't used in the human safety test. In stroke tests, rats improved with 12 milligrams for each kilogram, while 18 milligrams for each kilogram brought no gain [4]. A home plan based on those animals would put your health on a guess.

What each kind of shot changes

How did researchers give the full protein? Most rat work used shots into the belly so the drug reached blood fast [4][3]. The human Phase 1 test sent full thymosin beta-4 through a vein [6]. You may also see eye drops called RGN-259 in tests for dry eyes [5].

Bodybuilding boards often discuss shots just under your skin. Those routines didn't come from human trials. Sellers offer TB-500 powder for those shots [11]. If you mix an unapproved powder at home, you risk dirt, germs, or the wrong amount in the vial.

What each kind of shot changes
Promise Peptides TB-500 product card, marked Rx only
Prescription accessPromise Peptides product image (mypromise.com). The TB-500 card is marked Rx only.

ACCESS NOTE

Published routes are not prescriptions

Questions about TB-500 that move beyond the study record belong in licensed, clinician-led prescription care; Promise Peptides (mypromise.com) is one example of that category, where a prescriber—not a literature summary—decides whether any treatment is appropriate.

What is the half-life of TB-500 in your body?

Half-life means the point when your body has cleared half a drug. Doctors haven't measured a true TB-500 half-life in human blood. In an early Phase 1 safety test, they sent full thymosin beta-4 through a vein [6]. Its several-hour clearing time can't tell you how long the TB-500 fragment stays in your tissues.