Astaxanthin Helped Artificially Aged Rats Navigate a Water Maze
Graded Preliminary — an experiment in 64 rats over nine weeks, with aging triggered artificially by a sugar; there are no human data.
Animal study. Findings may not carry over to people, which is why the grade is capped at Preliminary.
- Design
- Animal study
- Participants
- 64
- Duration
- 9 weeks
- Funding
- Key Natural Science Research Project of Higher Education Institutions of Anhui…
Astaxanthin improved learning and memory in artificially aged rats and reduced damage in their livers and brains.
Rats aged artificially with a sugar had more trouble finding their way through a water maze. When they also received astaxanthin, they did better. Astaxanthin is a natural antioxidant, a substance meant to shield cells from damage by aggressive oxygen compounds. The rats' livers and brains also showed less of this damage.
The researchers assigned 64 young male rats at random to eight groups. For nine weeks, most received high doses of D-galactose, a sugar that triggers signs of aging in rats. Some also got astaxanthin at one of three doses, others got vitamin E. With astaxanthin, protective enzymes in the liver and brain rose again, and an inflammation marker in the blood fell. One group also received a blocker of Nrf2, a switch that turns on the cell's own protective enzymes. The benefits then weakened.
This points to astaxanthin acting through that switch. But the model is artificial: the rats did not age naturally but because of the sugar. The authors themselves say the results cannot simply be applied to people and that human studies are needed. The study reports nothing about side effects.
Conflict of Interest Disclosure: Authors declare no competing interests.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.