What was studied?
Fourteen middle-aged people with severe chronic insomnia were studied under double-blind, placebo-controlled conditions. Measurements included laboratory sleep recordings and tests of daytime psychological state and performance.
What did the researchers report?
The authors reported improvements in nighttime sleep and daytime alertness or performance during the experimental period. Some changes persisted into the first post-treatment observation night.
What are the limits?
The very small sample and limited follow-up require caution. This publication predates the later 16-participant DSIP trial with weaker findings; the studies should be read together rather than selecting only the positive report. The results do not establish modern clinical effectiveness or a personal-use protocol.
Original editorial summary by Sulan Peptide. Based on the source abstract; consult the full paper for methods, analyses, funding and disclosures.