Licorice root (Glycyrrhiza glabra) is one of the most widely used herbs in the world, prized for thousands of years in Chinese, Persian, Ayurvedic, and European traditions for its soothing and adaptogenic qualities. Silk tree bark (Albizia julibrissin), called He Huan Pi in Traditional Chinese Medicine, translates literally as 'collective happiness bark' and has been used for centuries as a calming herb for the mind and heart. Together, these two herbs form a classic TCM pairing aimed at easing emotional distress, calming a racing mind, and restoring restful sleep.

Silk tree bark appears to work largely through the serotonin system — its active compounds help regulate serotonin receptors and may gently support GABA activity, both of which calm nervous system overactivation. Licorice complements this by helping the body handle stress more gracefully, partly by slowing the breakdown of cortisol and supporting balanced adrenal function. Together, they provide a layered calming effect that targets both the emotional and physiological sides of anxiety and poor sleep.

Traditional TCM decoctions (simmered teas) using dried bark and root remain popular and are considered highly effective. For everyday convenience, standardized capsules or liquid extracts are widely available. Tinctures offer flexible dosing. When choosing a product, look for standardized extracts that specify glycyrrhizin content for licorice, and julibroside content for silk tree.

• Anxiety and nervous tension
• Low mood and mild depression
• Sleep and insomnia
• Stress and adrenal fatigue
• Irritability and emotional overwhelm
• Grief and emotional trauma
• Menopausal mood changes
• Chronic fatigue with mood component
• Hormonal imbalance (women)
• Cognitive fog linked to stress

• Relapse of depressive episodes during high-stress periods (emerging evidence for silk tree's serotonergic support)
• Hormonal acne and androgen-driven skin issues in women (licorice's androgen-modulating effects)

• Licorice root tea — The most direct way to consume glycyrrhizin and licorice's active flavonoids in a whole-food form, widely available as a dried root or tea bag.
• Fennel — Shares some of the same volatile compounds and mild phytoestrogenic properties as licorice, and supports digestive and hormonal pathways in a similar way.
• Tart cherries — Support serotonin and melatonin production, reinforcing the sleep and mood pathways that silk tree targets.
• Walnuts — Rich in serotonin precursors and anti-inflammatory omega-3s, supporting the same nervous system calming effects as silk tree bark.
• Dark leafy greens (spinach, kale) — High magnesium content supports GABA activity and stress resilience, complementing both herbs' calming mechanisms.

• Recommended daily: Licorice root extract: 200–600 mg standardized to 20% glycyrrhizin, OR deglycyrrhizinated licorice (DGL) 380–1,140 mg for safer long-term use. Silk tree bark extract: 200–500 mg standardized extract, or 3–9 g dried bark in decoction per TCM guidance. In combined formulas, follow product label dosing.
• Best time of day: Evening dosing is preferred when the primary goal is sleep or anxiety relief — silk tree's calming effects are especially useful 1–2 hours before bed. For stress and mood support, split dosing (morning and evening) works well.
• With or without food: Best taken with food to minimize any digestive upset and to support absorption of fat-soluble flavonoids.
• Time to effect: Mild calming effects within days; meaningful mood and sleep improvements typically seen after 2–6 weeks of consistent use.
• How long to take it: For general stress and mood support, cycles of 8–12 weeks followed by a 2–4 week break are commonly recommended, particularly with standard licorice (not DGL). DGL formulations can generally be used for longer periods without the blood pressure concern. Consult a practitioner for ongoing use beyond 3 months.