Dr. Grey AI

Clubmoss

Clubmoss refers to plants in the Lycopodiaceae family, particularly Huperzia serrata (Chinese club moss), which is the source of Huperzine-A - a potent acetylcholinesterase inhibitor. Huperzine-A is studied for cognitive enhancement and Alzheimer's disease treatment. While Huperzine-A has human trial data (see separate entry), whole clubmoss extracts are less studied. The plant contains numerous unique alkaloids beyond Huperzine-A. Traditional Chinese medicine uses for memory and cognitive support.

Quick Answer

What it is

Clubmoss refers to plants in the Lycopodiaceae family, particularly Huperzia serrata (Chinese club moss), which is the source of Huperzine-A - a potent acetylcholinesterase inhibitor. Huperzine-A is studied for cognitive enhancement and Alzheimer's disease treatment.

Key findings

  • Grade C: Cognitive Function in Alzheimer's Disease
  • Grade C: Acetylcholinesterase Inhibition
  • Grade D: Neuroprotection

Safety

  • In vitro and animal studies show that Huperzine-A and other clubmoss alkaloids protect neurons against glutamate excitotoxicity, oxidative stress, and beta-amyloid-induced toxicity.
ℹ️ Quick Facts: Clubmoss

Quick Facts: Clubmoss

  • Best Evidence:Grade C
  • Conditions Studied:2
  • Research Outcomes:5
  • Key Effect:Alzheimer’s Disease
Outcomes by grade:
A0
B0
C2
D3
2 conditions · 5 outcomes

Detailed Outcomes

|
C
Cognitive Function in Alzheimer's Disease
Huperzine-A, the primary active alkaloid from Huperzia serrata, has multiple RCTs and a Cochrane review showing cognitive benefits in Alzheimer's patients via acetylcholinesterase inhibition. However, these trials used isolated Huperzine-A rather than whole clubmoss extract, warranting a lower grade for the whole herb. One animal study using Japanese H. serrata extract demonstrated amelioration of scopolamine-induced cognitive impairment in mice.
moderate↑Improves
C
Acetylcholinesterase Inhibition
Multiple in vivo animal studies confirm that Huperzia alkaloid extracts inhibit acetylcholinesterase activity in brain tissue. Huperzia quadrifariata and H. reflexa alkaloids inhibited AChE in vivo in mice, and several related Huperzia species demonstrate comparable activity. The mechanism is well-established for Huperzine-A and supported for whole-herb preparations containing multiple lycopodium alkaloids.
moderate↓Worsens
D
Neuroprotection
In vitro and animal studies show that Huperzine-A and other clubmoss alkaloids protect neurons against glutamate excitotoxicity, oxidative stress, and beta-amyloid-induced toxicity. These neuroprotective effects extend beyond acetylcholinesterase inhibition and involve multiple alkaloid constituents of Huperzia serrata. No human clinical data exists for neuroprotection with whole clubmoss extracts.
small↑Improves
D
Cognitive Function (Scopolamine-Induced Impairment)
A 2015 study using Japanese Huperzia serrata extract (whole herb, not isolated Huperzine-A) ameliorated scopolamine-induced cognitive impairment in mice, suggesting the whole extract retains cholinergic cognitive-enhancing properties. This is one of the few studies using whole clubmoss extract rather than purified Huperzine-A.
moderate↑Improves
D
Memory Enhancement in Healthy Adults
A small number of studies suggest Huperzine-A may enhance memory in healthy young adults, particularly procedural memory. Evidence is limited, derived from isolated Huperzine-A rather than whole clubmoss extract, and requires replication in larger controlled trials.
small↑Improves

Related Supplements

Spikenard

2 shared conditions · 8 outcomes

Spikenard (Jatamansi) is an Ayurvedic herb traditionally used for calming, cognitive enhancement, and neuroprotection. Similar traditional uses to Bacopa but with less research. Contains sesquiterpenes and volatile oils. NO GRADED OUTCOMES - human research is very limited. Preclinical studies show neuroprotective potential. Traditionally used for epilepsy, anxiety, and memory. The plant is endangered due to overharvesting; sustainable sourcing is a concern.

Salidrosides

2 shared conditions · 11 outcomes

Salidroside is a glucoside compound and one of the main bioactive constituents of Rhodiola rosea. Often standardized in Rhodiola extracts (typically 1-3%). Has neuroprotective and adaptogenic properties. Research shows anti-fatigue, anti-stress, and potential anti-depressant effects. Mechanism involves HPA axis modulation, AMPK activation, and antioxidant effects. Most clinical evidence is for the whole Rhodiola rosea extract rather than isolated salidroside. May be more effective as part of whole plant extract than in isolation.

Piracetam

2 shared conditions · 15 outcomes

Piracetam is the parent compound of the racetam class of nootropic supplements. When supplemented, it provides a mild boost to brain function.

Phosphatidylserine

2 shared conditions · 73 outcomes

Phosphatidylserine (PS) is an amino acid derivative that is fat soluble and found in high amounts in the brain, where it contributes to cognitive functioning. PS has been studied the most for cognition in adults over 50, for people with high chronic stress, and for exercise performance, but further research is needed to confirm any benefit.

Muira puama

2 shared conditions · 6 outcomes

Muira puama is a Brazilian herb traditionally used as an aphrodisiac and nerve tonic. The nickname 'Potency Wood' reflects its traditional sexual health use, but human evidence for sexual benefits is weak. Interestingly, preliminary research suggests it may be effective as a COGNITIVE ENHANCER rather than an aphrodisiac. Contains lupeol and other triterpenoids. NO GRADED OUTCOMES - lacks quality human trials for either sexual or cognitive claims. The cognitive enhancement angle warrants more research.

Ginkgo Biloba

2 shared conditions · 173 outcomes

Ginkgo biloba is the most commonly ingested herb for brain health. While it may boost cognition in older populations, this effect is not very reliable or generalizable.

Fish Oil

2 shared conditions · 448 outcomes

Fish oil is a mix of mostly EPA and DHA derived from fatty fish. It reduces triglycerides, but does not seem to affect the rate of cardiovascular events. It appears to reduce the symptoms of depression and improve some painful, inflammatory conditions.

Curcumin

2 shared conditions · 502 outcomes

Curcumin is the primary bioactive substance in turmeric. It has anti-inflammatory properties and can alleviate symptoms of depression as well as improve pain and function in people with osteoarthritis.