# Club Moss (Lycopodium clavatum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/club-moss
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-20
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Lycopodium clavatum, Stag's Horn Clubmoss, Running Pine, Ground Pine, Wolf's Claw, Foxtail, Vegetable Sulfur, Witch Meal

## Overview

Club Moss (Lycopodium clavatum) is a spore-bearing plant containing the alkaloid huperzine A and the flavonoid apigenin, which interact with acetylcholinesterase and [antioxidant](/ingredients/condition/antioxidant) pathways respectively. Its traditional European use centers on digestive support and diuresis, while modern preliminary research focuses on its UV-protective and [neuroprotective](/ingredients/condition/cognitive) potential.

## Health Benefits

• May protect skin cells from UV damage through apigenin content (preliminary evidence from in-vitro studies)
• Traditional use for digestive disorders and stomach aches (traditional evidence only)
• Reported diuretic properties in traditional medicine systems (no clinical evidence)
• Historical use as a laxative (traditional evidence only)
• Traditional tonic properties for general wellness (no clinical validation)

## Mechanism of Action

Apigenin, a flavonoid present in Lycopodium clavatum, acts as a scavenger of [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) and modulates [NF-κB](/ingredients/condition/inflammation) signaling, reducing UV-induced oxidative stress in keratinocytes in vitro. Lycopodium alkaloids, including annotinine and lycopodine, have demonstrated weak inhibitory activity against [acetylcholine](/ingredients/condition/cognitive)sterase (AChE), the enzyme responsible for breaking down acetylcholine at synaptic junctions, though this effect is far less potent than the closely related Huperzia serrata-derived huperzine A. The plant's reported diuretic effect is hypothesized to involve modulation of renal tubular reabsorption, but no specific receptor or enzyme target has been confirmed in human physiology.

## Clinical Summary

There are currently no published randomized controlled trials (RCTs) evaluating Lycopodium clavatum as a standardized supplement in human subjects for any health outcome. The UV-protective property of apigenin has been demonstrated in cell-based (in vitro) models using cultured human keratinocytes, but these findings have not been translated into clinical trials. Its use for digestive complaints and as a diuretic is documented in European folk medicine traditions and recorded in historical pharmacopoeias, constituting traditional evidence rather than clinical proof of efficacy. The overall evidence base is very weak, and no quantified therapeutic dosages have been established through controlled human research.

## Nutritional Profile

Club Moss (Lycopodium clavatum) is not a food-grade ingredient and has no meaningful macronutrient profile for nutritional purposes. Protein content is negligible (<1% dry weight). Carbohydrates are present primarily as structural polysaccharides and sporopollenin in spore walls. Fat content is low but spores contain fatty acids including oleic acid and palmitic acid at trace levels. The primary bioactive compounds include: alkaloids (lycopodine, annotinine, clavolonine, fawcettimine-type alkaloids) estimated at 0.1–0.5% dry weight of whole plant; flavonoids including apigenin and its glycosides at approximately 0.05–0.2% dry weight, concentrated in aerial parts; sporopollenin polymer comprising the outer spore wall (highly resistant to degradation, very low bioavailability); lycopodium spore oils containing sporopollenin-bound lipids; triterpenes including serratenediol and related compounds at trace levels. Mineral content includes small amounts of silica, calcium, and potassium, but concentrations are not nutritionally significant. Fiber is present as cellulose and sporopollenin structural components. Bioavailability of alkaloids is considered moderate via topical or oral routes, though systemic absorption data in humans is limited. Apigenin bioavailability is low due to glycosidic binding and plant matrix entrapment. The spore powder historically used as a dusting agent has near-zero nutritional bioavailability due to the inert sporopollenin coat.

## Dosage & Preparation

No clinically studied dosage ranges are available in the research. One homeopathic formulation exists as Lycopodium clavatum 9C pellets, but this represents homeopathic potency rather than standardized herbal extract dosing. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Lycopodium clavatum spore powder has a long history of topical pharmaceutical use as a dusting agent and is generally considered low-risk in that context, but oral internal use carries an unclear safety profile due to the presence of cytotoxic alkaloids including lycopodine and clavolonine. The alkaloid content may theoretically potentiate cholinergic drugs such as anticholinesterases (e.g., donepezil, neostigmine), increasing the risk of cholinergic excess symptoms including nausea, bradycardia, and excessive secretions. Use during pregnancy and breastfeeding is contraindicated given the lack of safety data and the presence of potentially toxic alkaloids. Individuals with kidney disease should avoid internal use given the unverified diuretic claims and unknown renal effects of its alkaloid constituents.

## Scientific Research

The available research is extremely limited, with only one partial citation referencing apigenin from Lycopodium clavatum stimulating nucleotide excision repair genes in skin keratinocytes. No completed clinical trials, RCTs, or meta-analyses with full PMIDs were found in the provided research dossier.

## Historical & Cultural Context

Lycopodium species have been traditionally used in homeopathy and herbal medicine, with L. clavatum specifically employed for treating digestive disorders, stomach aches, and diarrhea. Traditional medicine systems attribute diuretic, laxative, and tonic properties to this plant.

## Synergistic Combinations

Other digestive herbs, traditional European botanicals, [antioxidant](/ingredients/condition/antioxidant) flavonoids, UV-protective compounds

## Frequently Asked Questions

### What is Club Moss used for traditionally?

In European traditional medicine, Lycopodium clavatum was historically used to relieve digestive disorders including stomach cramps, bloating, and indigestion, as well as to promote urination as a diuretic. It also appeared in older pharmacopoeias as a topical dusting agent for pills and skin conditions. These uses are based on historical practice and have not been validated by modern clinical trials.

### Does Club Moss protect skin from UV damage?

Preliminary in vitro research suggests that apigenin, a flavonoid found in Lycopodium clavatum, can reduce UV-induced oxidative stress in cultured human skin cells by scavenging reactive oxygen species and suppressing NF-κB inflammatory signaling. However, these results come exclusively from lab-based cell studies and have not been replicated in human skin trials or topical formulation studies. It is too early to recommend Club Moss as a UV-protective ingredient for humans based on current evidence.

### Is Club Moss the same as Huperzia serrata for memory support?

No, Lycopodium clavatum and Huperzia serrata are related but distinct club moss species with very different alkaloid profiles. Huperzia serrata is the source of huperzine A, a potent and well-studied acetylcholinesterase inhibitor used in memory and cognitive support supplements. While Lycopodium clavatum contains related alkaloids like lycopodine and annotinine with weak AChE inhibitory activity, the potency is substantially lower and no clinical evidence supports its use for cognition or memory.

### What are the side effects of taking Club Moss internally?

Internal use of Lycopodium clavatum is associated with potential toxicity due to its alkaloid content, including lycopodine and clavolonine, which can cause nausea, gastrointestinal irritation, and in higher doses may exert neurotoxic effects. Because its alkaloids have weak cholinergic activity, symptoms of cholinergic stimulation such as excessive salivation, sweating, and bradycardia are theoretically possible, particularly in high doses. There is insufficient human safety data to establish a safe oral dosage range.

### Can you take Club Moss with prescription medications?

Club Moss should be used with caution alongside cholinergic or anticholinesterase medications such as donepezil, rivastigmine, or neostigmine, as its alkaloids may weakly inhibit acetylcholinesterase and could amplify drug effects, increasing the risk of cholinergic side effects. There is also a theoretical concern with diuretic medications, as combining unverified diuretic herbs with prescribed diuretics may alter electrolyte balance. Anyone taking prescription medications should consult a healthcare provider before using Club Moss internally.

### What is the difference between Club Moss spore powder and Club Moss leaf extract?

Club Moss spore powder (lycopodium) is a fine, dry powder historically used as a dusting agent and in traditional medicine, while leaf extracts concentrate the plant's active compounds in liquid or capsule form. Spore powder has limited bioavailability for internal use, whereas extracts may provide higher concentrations of flavonoids like apigenin, though clinical evidence comparing the two forms is lacking. The choice between forms depends on intended use, with extracts generally preferred for supplemental intake.

### Is Club Moss safe to use during pregnancy or while breastfeeding?

There is insufficient clinical research on Club Moss safety during pregnancy and breastfeeding, and it is generally recommended to avoid use during these periods as a precaution. Traditional use does not provide adequate safety data for vulnerable populations, and the plant's diuretic and laxative properties could potentially affect nutrient absorption or hydration. Pregnant or nursing individuals should consult a healthcare provider before considering Club Moss supplementation.

### How does the strength of evidence for Club Moss compare to other herbal digestive remedies?

Club Moss lacks rigorous clinical trials supporting its digestive benefits, with most evidence limited to traditional use and preliminary in-vitro studies, placing it below herbs like ginger or peppermint that have robust human studies. While traditional medicine systems have documented Club Moss for stomach complaints, modern research has not confirmed efficacy through randomized controlled trials. Other herbal digestive remedies with stronger clinical backing may be preferred if evidence-based efficacy is a priority.

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