STUDY AMOUNTS / ANIMALS AND PEOPLE
Is there a proven TB-500 dosage for people?
No. The amounts below came from animal work or whole-protein studies. They aren't a dose or schedule for you, and human research hasn't measured the time the small copy remains in your body.
What TB-500 dosage numbers don't tell you
TB-500 dosage numbers in papers aren't a plan for a person. Some rodent heart and brain work used 6–12 milligrams per kilogram of rat weight. In a rat stroke test, researchers tried 2, 12, and 18 milligrams per kilogram; a dose chart predicted 3.75 milligrams per kilogram [4]. One beta-4 mouse study used 150 micrograms twice a week for 6 months [5], while 10 trillionths of a gram only moved skin cells grown in dishes [3].
The human amounts came from the beta-4 protein, not TB-500. Phase 1, an early safety test, tried four rising amounts in a vein: 42, 140, 420, and 1260 mg. Each person got one amount and then daily amounts for 14 days, with no serious harm reported [6]. Animal tests also put the whole protein inside the abdomen, on skin, and in eyes [5].
Some users call a larger starting amount "loading" before taking less, but controlled human trials haven't tested that plan [5]. In the stroke test, 18 milligrams per kilogram gave no help, while 2 and 12 milligrams per kilogram did [4]. For my own family, I wouldn't turn that animal finding into a plan. These numbers don't give your body a safe amount or schedule.
What changes when a study uses a different kind of dose
The result can change with the way a drug enters the body. Rodent muscle, wound, and stroke tests injected the beta-4 protein into the space around the organs in the abdomen [3][4][5]. Phase 1, an early human beta-4 safety test, used a vein, as did some heart teams [6][5]. Other tests put the beta-4 protein on skin or eyes [5], while user reports describe injections into muscle or just below skin [5].
Those ways aren't equal. An amount inside a rat's abdomen can't stand in for a human vein dose. Neither amount was tested for TB-500. One number can mislead you when the animal and the method are left out.
The gap is wider in a dish. About 10 trillionths of a gram made skin-cell movement rise 2–3-fold, meaning the movement doubled or tripled [3]. Tiny lab amounts of beta-4 also stirred cells at hair roots [5]. A dish isn't a whole animal, so neither result gives you an amount for your injury.
Lab suppliers may sell TB-500 samples as freeze-dried powder for research, not patient care; labs mix in clean water, then chill the sample [5]. Warming and freezing can harm it, and the label may not tell you what's in a vial [5]. That makes reports from two users hard to compare. Your route into the body changes what reaches you, so your doctor can't swap the figures.
What the TB-500 half-life still can't tell you
TB-500 half-life means the time your body may take to clear half of it. Nobody has measured that time in a human study [5]. In Phase 1, an early safety test, the body cleared the whole protein more slowly when the amount rose [6]. Horse drug tests looked for TB-500 after use, but they weren't built to time it in people [5].
From its chemistry, the small copy may be harder to break down than the whole beta-4 protein. Your body can still break it down, and warming or freezing can damage it [5]. Any human half-life number you see for the copy is an estimate. It isn't a measured fact.
What the TB-500 half-life means for your plans
There isn't a proven human half-life for TB-500 [5]. The whole beta-4 protein lasted longer at higher amounts in a Phase 1 test [6]. That early test left out the small copy, while horse tests only showed that labs could find it. Your doctor can't use that guess to time your care or know your result or risk.