About Greater galangal (enXtra)
Greater galangal (Alpinia galanga) rhizome extract, standardized as enXtra, has been studied in small, mostly industry-sponsored trials for alertness and attention without caffeine-like jitters. Evidence is limited.
What Greater galangal (enXtra) supports
- May support alertness without caffeine - small, mostly industry trials
How much Greater galangal (enXtra) to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
300–600
mg
Alertness/attention trials of standardized enXtra used ~300 mg.
Clinical evidence
Limited clinical evidence. Few small, mostly industry-sponsored trials.
NIH Fact Sheet