one small scalp study and no firm answer
One Small Study Drives Thymulin Hair Loss Claims
Everyone knew which spray they received. No fair comparison group or second research team has confirmed hair growth.
One weak study started the thymulin hair claim
Nearly every thymulin hair loss claim leads to one small scalp-spray study. It covered common pattern hair loss. Everyone knew which spray they received. No other group received a different spray for a fair check.
The paper reported no clear trouble from the spray. Some websites quote exact percentages for new hair. The available paper didn't give enough support to check those figures. One small report isn't a result you can rely on.
The thymulin hair study can't prove new growth
The scalp report found no clear harm
One small study gave people with pattern hair loss a zinc-thymulin spray. The author called the work an early test. The report said the spray caused no clear trouble. This is all the direct human hair work available.
No comparison group got another spray without knowing which one it was. No second team has repeated the test. The paper didn't firmly support the exact growth figures quoted online. Thymulin isn't approved for hair loss.
The spray wasn't tested against a fair comparison
Hair counts can change on their own. People may also judge growth differently when they know which spray they got. Without a hidden, fair comparison, the study couldn't prove that the spray caused a change. Its small size left more room for chance.
One author wrote the report. It didn't appear in a well-known medical journal, and no other team confirmed the result. The paper raises a question worth testing. Hair growth from thymulin remains unproved.
Zinc may have caused part of any hair change
The scalp spray contained both zinc and thymulin. In cell tests, thymulin did nothing until zinc was attached [1][2]. Zinc can also affect hair and skin on its own. The study didn't test a zinc-only spray.
Any change could have come from thymulin, zinc, both, or neither. The thymulin study page explains why those effects are hard to separate. One small test with two active parts can't tell you which one mattered. A fair test would need a zinc-only group.
A fair trial could answer the hair-loss question
A stronger test would place people into groups by chance. Nobody counting hair would know which spray each person got. One group would get a placebo, a spray with no thymulin. A zinc-only group would show what zinc did alone.
No such test has happened. Thymulin and hair loss still rest on one small study where everyone knew the spray. Stronger work could change the answer. The thymulin side effects page covers the wider safety gap.