Comparison
Lion's Mane vs Semax
Side-by-side of Lion's Mane and Semax. 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.
Semax
Semax peptide benefits: nootropic ACTH(4-10) analog without corticotropic activity. Cognitive enhancement, neuroprotection, intranasal dosing, Russian stroke.
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
Semax
- •Synthetic heptapeptide analog of ACTH(4-10) developed in Russia in the 1980s
- •Approved in Russia for ischemic stroke, cognitive impairment, and cerebrovascular disorders
- •Lacks the corticotropic activity of native ACTH due to the Pro-Gly-Pro stabilizing tail
- •Russian RCTs report improved cognitive recovery in acute ischemic stroke versus standard care
- •Modulates BDNF and NGF expression and dopaminergic signaling in preclinical models
- •Standard route is intranasal; not FDA approved; research-use-only outside Russia
Side-by-side
| Attribute | Lion's Mane | Semax |
|---|---|---|
| Category | natural | peptide |
| Also known as | Hericium erinaceus, Yamabushitake, Bearded Tooth, Hou Tou Gu | Met-Glu-His-Phe-Pro-Gly-Pro, ACTH(4-10) Pro-Gly-Pro analog |
| Half-life (hr) ↗ | 6 | 0.5 |
| Typical dose (mg) ↗ | 1000 | 0.6 |
| Dosing frequency | 1 to 2 times daily | 2-3x daily (intranasal) |
| Routes | oral | intranasal |
| Onset (hr) | 168 | 0.5 |
| Peak (hr) | 1344 | 2 |
| Molecular weight | - | 813.94 |
| Molecular formula | mixed extract | C37H51N9O10S |
| 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. | Modulates BDNF and NGF expression in hippocampus and cortex, enhances dopaminergic and serotonergic signaling, and reduces oxidative stress markers in preclinical ischemia models. Lacks corticotropic activity of native ACTH. |
| Legal status | Dietary supplement and food worldwide; unscheduled and unrestricted | Approved in Russia for stroke and cognitive disorders; not FDA approved; research-use-only grey market elsewhere |
| WADA status | allowed | unknown |
| DEA / Rx | OTC supplement and food | Not FDA approved; not scheduled; research-chemical status outside Russia |
| Pregnancy | Insufficient data for routine supplementation; consumed historically as food without documented harm | Not recommended; insufficient data |
| CAS | 80714-61-0 | |
| PubChem CID | 9811102 | |
| Wikidata | Q146050 | Q4413083 |
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)
Semax
Common side effects
- mild nasal irritation
- transient mild headache
- rare mild euphoria or activation
Contraindications
- pregnancy
- lactation
- acute psychotic disorder
- severe hypertension (caution due to mild activating effect)
Interactions
- stimulants (caffeine, amphetamines): potential additive activation; monitor for overstimulation(minor)
- antipsychotics: theoretical antagonism via dopaminergic modulation(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. Semax is the right call when one of the conditionals below applies.
- → If your priority is nerve health, pick Lion's Mane.
- → If your priority is mood, pick Lion's Mane.
- → If your priority is long-term neuroprotection, pick Semax.
- → If your priority is stroke recovery, pick Semax.
Edge case: If you want to avoid research-only / gray-market sourcing, Lion's Mane is the more accessible choice.
Default choice: Lion's Mane. Lower friction to source, and broader goal coverage. Reach for Semax 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 Semax?
Lion's Mane and Semax 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 Semax?
Lion's Mane half-life is 6 hours; Semax half-life is 0.5 hours.
Can you stack Lion's Mane with Semax?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
Go deeper