Comparison
Lion's Mane vs Thymosin Alpha-1
Side-by-side of Lion's Mane and Thymosin Alpha-1. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Lion's Mane
Lion's mane mushroom (Hericium erinaceus) supplement profile: hericenones and erinacines stimulate NGF in vitro. Human cognition trials are small.
Thymosin Alpha-1
Thymosin alpha-1 peptide (Zadaxin, thymalfasin): 28-amino-acid TA1 immunomodulator. Dosing, T-cell effects, hepatitis B and HCV adjunct evidence.
Effects at a glance
Lion's Mane
- •Edible medicinal mushroom containing NGF-stimulating hericenones and erinacines
- •Mori 2009 trial (n=30) in mild cognitive impairment showed cognitive improvement at 3 g/day for 16 weeks, reversing 4 weeks after discontinuation
- •Saitsu 2019 (n=31) in older adults reported MoCA improvements at 3.2 g/day over 12 weeks
- •Multiple small mood trials suggest reduced anxiety and depression scores at 1 to 4 g/day extract
- •Mechanistic case rests on NGF stimulation and remyelination support; in vivo human NGF measurement is absent
- •Product quality varies substantially; mycelium-on-grain products can be over 50% grain by weight
Thymosin Alpha-1
- •28-amino-acid synthetic peptide identical to thymic-derived immunomodulator
- •Approved in over 35 countries as Zadaxin for hepatitis B, hepatitis C adjunct, and immune support
- •Not FDA approved in US; compounded by 503A/503B pharmacies for off-label immune support
- •Modulates T-cell maturation, NK activity, and Th1 polarization in immunocompromised states
- •Standard label dose: 1.6 mg subcutaneously twice weekly
- •Cleanest safety profile in the peptide class with hundreds of regulated trials behind it
Side-by-side
| Attribute | Lion's Mane | Thymosin Alpha-1 |
|---|---|---|
| Category | natural | peptide |
| Also known as | Hericium erinaceus, Yamabushitake, Bearded Tooth, Hou Tou Gu | Talpha1, Ta1, Zadaxin, Thymalfasin |
| Half-life (hr) ↗ | 6 | 2 |
| Typical dose (mg) ↗ | 1000 | 1.6 |
| Dosing frequency | 1 to 2 times daily | 2x weekly |
| Routes | oral | subcutaneous, intramuscular |
| Onset (hr) | 168 | 24 |
| Peak (hr) | 1344 | 168 |
| Molecular weight | - | 3108.32 |
| Molecular formula | mixed extract | C129H215N33O55 |
| Mechanism | Hericenones and erinacines stimulate NGF mRNA expression and NGF protein release in cultured neurons; secondary anti-inflammatory and remyelination-supportive activity in preclinical models. | Synthetic peptide modulator of innate and adaptive immunity. Promotes T-cell maturation and CD4/CD8 production, modulates Th1/Th2 balance, stimulates NK cell activity, and modulates TLR2/TLR9 signaling in dendritic cells. |
| Legal status | Dietary supplement and food worldwide; unscheduled and unrestricted | Approved in 35+ countries as Zadaxin (hepatitis B, hepatitis C adjunct, immune support); not FDA approved in US; compounded by 503A/503B pharmacies for off-label use; not on WADA Prohibited List |
| WADA status | allowed | unknown |
| DEA / Rx | OTC supplement and food | Rx only via international approval or US compounding (no controlled-substance schedule) |
| Pregnancy | Insufficient data for routine supplementation; consumed historically as food without documented harm | Not recommended; insufficient data |
| CAS | 62304-98-7 | |
| PubChem CID | 16130571 | |
| Wikidata | Q146050 | Q913854 |
Safety profile
Lion's Mane
Common side effects
- mild GI upset
- occasional skin rash
- contact dermatitis (rare)
Contraindications
- mushroom allergy
Interactions
- anticoagulants: theoretical antiplatelet effect, no documented clinical events(minor)
Thymosin Alpha-1
Common side effects
- mild injection-site irritation (rare)
- transient mild fatigue (rare)
- occasional headache (rare)
Contraindications
- pregnancy
- lactation
- active organ transplant rejection therapy
- systemic immunosuppression for autoimmune disease (relative)
- severe active autoimmune disease (caution)
Interactions
- interferon-alpha: additive immune effect; used clinically in approved combination protocols(minor)
- calcineurin inhibitors (cyclosporine, tacrolimus): theoretical destabilization of immunosuppression; avoid(major)
- antimetabolites (azathioprine, mycophenolate): theoretical destabilization of immunosuppression; avoid(major)
- vaccine administration: may augment vaccine response in elderly or immunocompromised; coordinate with clinician(minor)
Which Should You Take?
Lion's Mane comes out ahead for most readers on the criteria we weight: 3 catalogued goals, OTC dietary supplement, oral dosing, with a Tier-B outcome catalogued. Thymosin Alpha-1 is the right call when one of the conditionals below applies.
- → If your priority is focus or working memory, pick Lion's Mane.
- → If your priority is nerve health, pick Lion's Mane.
- → If your priority is immune support, pick Thymosin Alpha-1.
- → If your priority is post-training recovery, pick Thymosin Alpha-1.
Edge case: If you want to avoid Approved in 35+ countries as Zadaxin (hepatitis B, hepatitis C adjunct, immune support); not FDA approved in US; compounded by 503A/503B pharmacies for off-label use; not on WADA Prohibited List, Lion's Mane is the more accessible choice.
Default choice: Lion's Mane. Lower friction to source, and broader goal coverage. Reach for Thymosin Alpha-1 only if your priority sits squarely in the goals it owns above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Lion's Mane and Thymosin Alpha-1?
Lion's Mane and Thymosin Alpha-1 differ in category (natural vs peptide), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Lion's Mane or Thymosin Alpha-1?
Lion's Mane half-life is 6 hours; Thymosin Alpha-1 half-life is 2 hours.
Can you stack Lion's Mane with Thymosin Alpha-1?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
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