Thymalin

A thymus-derived peptide preparation from Russian research, studied for immune effects in older adults.

What research shows

Thymalin comes from one Russian research programme, where a controlled study of thymus and pineal preparations reported effects on survival measures in older people. No independent replication outside that programme was verified, and modern safety and dosing data are absent.

Evidence strength

Highest evidence grade among the graded claims: B. Grades reflect study strength, not benefit.

Safety context

See the safety section. Absence of a flag is not evidence of safety.

No endorsement

A grade reflects evidence strength, not a recommendation to use this compound; a strong grade can attach to a harmful effect.