Mesima
Useful mainly for people seeking a traditional immune-support mushroom, accepting weak evidence.
Quick decision guide
May help most
people seeking a traditional immune-support mushroom, accepting weak evidence
Common dosing range
Label-directed extract, commonly 1–3 g/day
When to expect effects
Unclear
Watch out for
Not a cancer treatment; limited human safety data
What is it
Mesima (Phellinus linteus) is a medicinal mushroom used in East Asian traditional medicine, sold as an extract rich in polysaccharides and beta-glucans. It is marketed mainly for immune support and as a complementary agent in cancer care. Human evidence is very limited, with most data coming from laboratory and animal studies.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
immune support Mixed Evidence | Unclear | adults seeking general immune support with modest expectations | Unclear |
immune support
- Effect
- Unclear
- Best fit
- adults seeking general immune support with modest expectations
- Time
- Unclear
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
immune support
Mechanism onlyPhellinus linteus polysaccharides modulate immune cells and show antitumor activity in cell and animal models, which underpins its traditional reputation. Robust human trials demonstrating clinical immune benefit are lacking, and existing human reports are small or anecdotal. Claims should be limited to mechanism, not proven outcomes.
Bottom line: Immune effects are shown only in lab and animal models, not in controlled human studies.
Evidence is mixed
Strong preclinical signals are not matched by human trial evidence, so clinical benefit is unproven.
How to take it
What to track
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Rare reports of hypersensitivity/pneumonitis with some medicinal mushrooms
Who should avoid it
- People on immunosuppressive therapy without medical advice
- People with mushroom allergy
- Pregnant or breastfeeding people
Pregnancy & breastfeeding
Avoid; safety has not been established.
Interactions
Immune-modulating effects could theoretically oppose immunosuppressive therapy
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
References by claim
immune support
Zhu et al., 2008 — PubMed (2008) link
Track Mesima with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.