MAster pharma Thymosin Beta 4 (TB500) 5mg steroid

TB-500 is a synthetic peptide believed to be a fragment of the body’s own protein thymosin beta-4. It is sold primarily in the research chemicals sector. It is not an anabolic steroid or a classic hormonal stimulant. 

Anabolic profile 

• does not activate the androgen receptor 

• does not directly increase testosterone 

• does not significantly increase GH or IGF-1 

• does not induce protein synthesis like anabolic steroids 

• has no direct effect on muscle hypertrophy 

In bodybuilding, it is seen more as a regenerative peptide than a muscle growth substance. 

Indirect regenerative effects 

• support for cell migration 

• support of angiogenesis 

• accelerating the healing of tendon and muscle injuries in experimental models 

• modulation of inflammation 

These effects are mainly discussed in experimental and animal contexts. 

Combinations 

• testosterone 

• nandrolone 

• trenbolone 

The goal is not to enhance direct anabolic power, but to potentially support recovery during high training loads or during a steroid cycle. 

Expectations and risks 

• subjectively faster healing of tendons or muscle problems 

• better mobility 

• no significant direct muscle gain 

• unclear systemic effects 

• theoretical support for unwanted cell proliferation 

• risk of impure unregulated products 

• lack of long-term safety data 

Humanitarian data is very limited. 

Status and summary 

TB-500 is not approved for performance enhancement and is prohibited in competitive sports. Its place in bodybuilding is more of a restorative, not anabolic, use.