Skullcap
Scutellaria lateriflora (American Skullcap)
Calming herb that supports relaxation and sleep through GABA modulation — gentler than valerian with less morning grogginess.
American Skullcap (Scutellaria lateriflora) is a mint-family herb traditionally used for anxiety, nervous tension, and sleep. Its flavonoids, particularly baicalin and scutellarein, modulate GABA receptors to promote calm without heavy sedation. Often preferred over valerian for its gentler action and lack of morning grogginess. Not to be confused with Chinese skullcap (S. baicalensis).
Mechanisms of Action
GABA-A Modulation
Enhances calming GABA activity
Anxiolytic Effects
Reduces anxiety without heavy sedation
Recommended Dose
350-450mg dried herb OR 1-2ml tincture (1:5), up to 3x daily
Optimal Timing
- Before bed for sleep
- During day for anxiety as needed
Can be taken without food
Best Form
Fresh plant tincture (most traditional)
Alternatives: Dried herb capsules, Tea
Fresh plant tinctures may be more effective than dried herb. Eclectic physicians favored fresh preparations.
Duration
Minimum: 2 weeks
Optimal: 8 weeks
Cycling: Not required
Note: Can be used acutely for anxiety or regularly for nervous system support. Take 30-60 min before bed for sleep.
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Calm Relaxation
Reduced anxiety and nervous tension
Sleep Support
Easier sleep onset
Traditionally avoided; insufficient data
Who Should NOT Take This
- Known allergy or hypersensitivity to Skullcap or related compounds
- Liver disease
- Pregnancy and breastfeeding
Drug Interactions
May have additive sedative effects
Theoretical interaction via GABA
Possible Side Effects
Tip: Reduce dose; don't drive if affected
Tip: Take with food
Warnings
- Ensure correct species — some products adulterated with germander (hepatotoxic)
- May cause drowsiness — use caution with driving
Top studies from 34+ peer-reviewed papers
Weiner JD et al. • Lupus science & medicine (2025)
“We identified 227 herbal supplements with immunostimulatory properties, of which 15 were most strongly supported by the evidence.”
Key Findings:
- We identified 227 herbal supplements with immunostimulatory properties, of which 15 were most strongly supported by the evidence.
- This article may serve as a reference to help clinicians counsel patients with autoimmune skin diseases on the risks associated with use of specific herbal supplements.
- Further research warranted to confirm findings
Nasiri R et al. • Tissue & cell (2025)
“All rights reserved.”
Key Findings:
- Research in both animal and cell models suggests that these flavonoids, especially baicalin, can restore cardiac health following MIRI, improving cardiac performance, and reducing cardiac damage.
- These findings underscore the potential of baicalin and baicalein as therapeutic options for MIRI.
- However, further research and clinical trials are necessary to elucidate their mechanisms fully and to develop baicalin into a viable treatment.Copyright © 2025 Elsevier Ltd.
- All rights reserved.
Chmiel M et al. • International journal of molecular sciences (2023)
“In this review, we summarized the latest reports on one of the most important aglycones with respect to the pharmacological activity and high content in Baikal skullcap, which is 5,6,7-trihydroxyflavone (baicalein).”
Key Findings:
- It has been documented that the extract of Baikal skullcap (Scutellaria baicalensis) has hepatoprotective, calming, antiallergic, and anti-inflammatory properties.
- Flavonoid compounds found in the extract, including baicalein, have strong antiradical activity, which improves overall health and increases feelings of well-being.
- Plant-derived bioactive compounds with antioxidant activity have for a long time been used as an alternative source of medicines to treat oxidative stress-related diseases.
- In this review, we summarized the latest reports on one of the most important aglycones with respect to the pharmacological activity and high content in Baikal skullcap, which is 5,6,7-trihydroxyflavone (baicalein).
Banik K et al. • Phytotherapy research : PTR (2022)
“These studies propound the use of WOG as a potential anticancer candidate; however, further high-quality studies are required to firmly establish the clinical efficacy of WOG for the prevention and treatment of human malignancies.© 2022 John Wiley & Sons Ltd.”
Key Findings:
- WOG, in combination with established chemotherapeutic drugs, improves the efficacy of treatment and lowers toxicity.
- Nevertheless, human trials are warranted to validate these findings.
- Numerous preclinical studies, combined with an extensive margin of safety and no severe side effects, underscore WOG's therapeutic potential as an anticancer drug.
- These studies propound the use of WOG as a potential anticancer candidate; however, further high-quality studies are required to firmly establish the clinical efficacy of WOG for the prevention and treatment of human malignancies.© 2022 John Wiley & Sons Ltd.
Xiong X et al. • Pharmacological research (2020)
“All rights reserved.”
Key Findings:
- Besides, no severe adverse effects was identified by CHM.
- CHM, especially classical Chinese herbal formulas, could be used as potential candidates for COVID-19 in this battle.Copyright © 2020 The Author(s).
- Published by Elsevier Ltd..
- All rights reserved.
Study Type Distribution
Goals This Supplement Supports
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This information is for educational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider before starting any supplement.