Digestion/Performance/Cognition

Cistanche

Traditional Chinese desert herb mainly studied for constipation and age-related fatigue, with limited human evidence overall.

Cistanche

Traditional Chinese desert herb mainly studied for constipation and age-related fatigue, with limited human evidence overall.

score

evidence

Caution

risk

Proven Benefits

01Relieves functional constipation

02May improve physical function

03May reduce fatigue

04May support cognitive function

Chemical Forms

Recommended

Cistanche tubulosa extract
Cistanche deserticola extract
Standardized phenylethanoid glycosides extract

Avoid

Whole herb powder without standardization
Proprietary blends with unspecified species
Raw decoction pieces from untested sources

Expert Note

Most human data use C. tubulosa extracts standardized to phenylethanoid glycosides, often including echinacoside and acteoside. Unstandardized powders and vague extract ratios vary widely in potency and make dosing unpredictable. Identity and contaminant testing matter because adulteration and heavy-metal exposure are recurring issues with some imported herbs.

Protocol

Amount

1000-2000 mg

Frequency

Once daily or split into 2 doses

When

With food and water; evening may be preferable if the goal is bowel regularity.

Condition-Based Dosing

Adults using it for functional constipation

1000-2000 mg daily for 2-4 weeks— Start at the low end if you are prone to loose stools; stop if bowel habits worsen.

Adults using it for age-related fatigue or physical function

1000-1800 mg daily for 8-12 weeks— Evidence is limited; discontinue if there is no clear change by 8 weeks.

Safety & Limits

Upper Safe Limit

No established UL; practical ceiling 3000 mg/day of standardized extract pending better safety data.

Cycling

Safe for continuous use

Contraindications

Pregnancy or breastfeeding — insufficient human safety data

Chronic diarrhea, IBS-D, or active IBD flare — may worsen loose stools

Immunosuppressive therapy or autoimmune disease — immune effects are uncertain

Anticoagulant or antiplatelet drugs — limited interaction data; use cautiously

Known allergy to Cistanche or related botanicals — avoid

Avoid Combining With

✕Antidiarrheal drugs like loperamide (oppose the bowel-motility effect)
✕Opioid pain medicines (can blunt the constipation benefit)
✕Low fluid intake (reduces the bowel-regularity effect)

Updated Invalid Date