herb · for poor memory
Rhodiola
Steadies your stress hormones and supports the brain chemicals memory depends on.
Say that in clinical terms
Rhodiola enhances cognitive function by modulating cortisol levels, increasing serotonin and dopamine availability, and supporting acetylcholine metabolism. Its adaptogenic properties protect neurons from stress-induced damage.
How strong is the research?
3 papers read, 1 supporting.
Tested as: Standardized extract SHR-5 (SHR/5) of Rhodiola rosea L. rhizome, one tablet daily for two weeks during night-duty shift
Who was studied: Studied in 56 doctors on night shifts, so it is about sleep deprivation rather than ongoing memory trouble.
How much to take
daily in the morning
200–400 mg
Use standardized extract (3% rosavins, 1% salidroside). Take in the morning on an empty stomach. May be stimulating if taken late in the day.
Before you take it
- No Tolerable Upper Intake Level (UL) has been established by NIH ODS for Rhodiola rosea — it is an herbal supplement without a formal UL; NCCIH considers it possibly safe for up to 12 weeks at studied doses (typically 200–600 mg/day).
- Safety in pregnancy and lactation is unknown; NCCIH states 'little is known about whether it is safe to use rhodiola during pregnancy or while breastfeeding'; clinical use during these periods should be avoided.
- In vitro inhibition of CYP3A4 and CYP2C9 confirmed (MSK Integrative Medicine); may reduce clearance of drugs with narrow therapeutic index metabolized by these enzymes, including warfarin, phenytoin, immunosuppressants, and antiretrovirals; clinical significance in humans is not formally established.
- Inhibits P-glycoprotein (P-gp) in vitro (MSK); may alter bioavailability or plasma concentrations of P-gp substrate drugs.
- MAO-A and MAO-B inhibitory activity demonstrated in vitro; avoid concurrent use with MAOIs; exercise caution when combined with SSRIs, SNRIs, or other serotonergic agents — a case report documented tachyarrhythmia in a patient combining Rhodiola with antidepressants.
- Interaction with losartan (an antihypertensive) has been reported by NCCIH; caution is warranted in patients on blood pressure medications.
- Common adverse effects at studied doses: dizziness, dry mouth, headache, and insomnia.
- No clinical safety data exist beyond 12 weeks of continuous use.
When to take it
Best taken: morning
What we make of it
The study measured performance on a night shift, not memory as an ongoing problem.
The detail
The trial looked at how doctors performed during night duty. Short-term memory was one measure among several, alongside arithmetic and reaction time. That is about coping with sleep loss, not about memory that is troubling you day to day.