Is TB-500 the same as thymosin beta-4?

No. TB-500 is a synthetic fragment; thymosin beta-4 is the full natural protein. Human evidence exists only for limited uses of the full protein.

Is TB-500 legal in Canada?

TB-500 is not authorized by Health Canada for any use, so it cannot legally be sold for human use in Canada. Health Canada has warned that 'research use only' labels do not exempt a product.

Can a Canadian doctor prescribe TB-500?

There is no authorized TB-500 product with a DIN in Canada. Ask a licensed healthcare professional about approved options for your situation.

Is TB-500 approved as a medicine?

No major regulator has approved it as a medicine for the uses marketed online. Most evidence is preclinical or anecdotal.

Does this page say where to buy or how to dose?

No. We do not publish sourcing, vendors, prices or dosing. We remove those from submissions.

Canada \u00b7 TB-500

TB-500 in Canada: the legal status and user reports.

TB-500 shows up often in Canadian peptide searches, usually next to shop listings. This page is non-commercial: what Health Canada says, what the science does and doesn't show, and what anonymous users report.

Health Canada's position

Injectable peptides are generally regulated as prescription drugs and must be authorized before sale. TB-500 has no authorization and no DIN in the Drug Product Database. Health Canada's April 2026 advisory warns that unauthorized peptides bought online can be contaminated, mislabelled or the wrong strength. More:are peptides legal in Canada?

What the evidence says

TB-500 refers to a thymosin beta-4 fragment researched for tissue repair in animals. It is not authorized in Canada, and WADA prohibits related substances in sport. Human data is sparse.

What TB-500 users report

29 published anonymous TB-500 confessions; 4 mention at least one side effect.

Most-mentioned side effects (share of TB-500 confessions):

Anxiety or panic: 3.4% (1)
Cramps: 3.4% (1)
Heart rate or palpitations: 3.4% (1)
Injection-site reaction: 3.4% (1)
Low mood or anhedonia: 3.4% (1)

Counts are phrase mentions in anonymous accounts, not diagnoses or clinical rates. Full breakdown and methodology: TB-500 hub.

TB-500 vs thymosin beta-4

	Thymosin beta-4	TB-500
What it is	Natural 43-amino-acid protein	Synthetic fragment marketed as its active region
Human studies	Small trials on eye and skin wound healing	None published
Canada	Not an authorized drug	Unauthorized; Health Canada advisory
Sport	Prohibited	Prohibited

Most claims about tendon and muscle healing come from animal studies of thymosin beta-4, not TB-500. Because it promotes cell migration and blood-vessel growth, people with cancer are usually advised to avoid it. See thymosin beta-4.

Last reviewed October 15, 2026against Health Canada's Drug Product Database and Health Canada and published studies.

Frequently asked questions

Is TB-500 the same as thymosin beta-4?: No. TB-500 is a synthetic fragment; thymosin beta-4 is the full natural protein. Human evidence exists only for limited uses of the full protein.
Is TB-500 legal in Canada?: TB-500 is not authorized by Health Canada for any use, so it cannot legally be sold for human use in Canada. Health Canada has warned that 'research use only' labels do not exempt a product.
Can a Canadian doctor prescribe TB-500?: There is no authorized TB-500 product with a DIN in Canada. Ask a licensed healthcare professional about approved options for your situation.
Is TB-500 approved as a medicine?: No major regulator has approved it as a medicine for the uses marketed online. Most evidence is preclinical or anecdotal.
Does this page say where to buy or how to dose?: No. We do not publish sourcing, vendors, prices or dosing. We remove those from submissions.

Sources

General information only — not medical, legal or regulatory advice. Peptide Confessions does not sell, source or recommend any product or vendor, and nothing here is dosing guidance. Speak with a licensed Canadian healthcare professional or pharmacist about any medication. Editorial process →