Overview
South African succulent acting as SSRI + PDE4 inhibitor for mood and stress.
- Whole dried plant material (root, leaf, flower, or aerial parts depending on the species)
- Standardized hydroethanolic or aqueous extract (capsule, tincture, or tea)
- Powdered traditional preparation used in Ayurvedic, TCM, or Western herbal practice
- Standardized extract capsule
- Liquid tincture (alcohol or glycerin)
- Powdered whole herb
- Traditional decoction or tea
Mechanism of action
Mesembrine alkaloids inhibit SERT and PDE4 in cortical regions.
- · Mesembrine alkaloids inhibit SERT
- · PDE4 in cortical regions
Effects on the body
Organ system effects
Kanna (Sceletium) modulates monoaminergic and GABAergic tone relevant to mood and anxiety regulation.
Evidence-based benefits
Reduces stress and anxiety
Moderate evidenceImproves executive function (Zembrin)
Limited evidencePotential side effects
- · Headache
- · GI upset
Drug interactions
Safety & non-supplemental interactions
Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.
- ·Pregnant or breastfeeding (insufficient safety data)
- ·Children under 18 (unless directed by a clinician)
Supplement interactions
- Omega-3 (EPA/DHA)Membrane fluidity and neuronal signaling support.
- Alpha-GPC or CDP-cholineProvides choline substrate for acetylcholine synthesis.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
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Third-party testedIndependently verified Kanna (Sceletium) — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Kanna (Sceletium) third party tested NSF
CapsulesPre-measured Kanna (Sceletium) capsules — easiest for travel and consistent daily dosing without scoops or scales.Kanna (Sceletium) capsules
PowderBulk unflavored Kanna (Sceletium) powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Kanna (Sceletium) powder unflavored
Best sellersMost-purchased Kanna (Sceletium) products on Amazon — a quick way to see what's reviewed widely before you commit.Kanna (Sceletium) best sellerScientific evidence9Show studiesHide studies
Zembrin for cognition and anxiety
Chiu S, et al.
3-week DB-RCT in 21 adults.
Improved cognitive flexibility and reduced subjective stress.
PubMed: Kanna (Sceletium) — Reduces stress and anxiety
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PubMed: Kanna (Sceletium) — Improves executive function
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