SupplementPreliminary evidenceStress

Mucuna pruriens (velvet bean)

Natural L-DOPA source with preliminary RCT signal in early Parkinson's disease, used in Ayurveda as kapikacchu for nervine support.

Why

Mucuna pruriens seed contains 4–7% L-dopa (levodopa) by weight, the standard pharmaceutical treatment for Parkinson's disease. The Cilia 2017 Neurology RCT (n=18 early PD) compared Mucuna with standard levodopa + carbidopa and found comparable motor-symptom benefit with fewer dyskinesias. Smaller bodies support use for fertility, mood, and sleep in Ayurvedic and modern preliminary research. Use in PD must be under specialist supervision; self-management is not appropriate.

How it works

Direct L-dopa content crosses the blood-brain barrier and is decarboxylated to dopamine, same final pharmacology as pharmaceutical levodopa. Additional bioactives (5-HTP precursors, prenylated flavonoids) modulate serotonin and monoamine systems.

Expected onset · Motor symptom effect within hours (acute, like pharmaceutical L-dopa); long-term outcomes assessed over months

How to take

Dosage

Pharmacological PD doses use 30 g of Mucuna seed powder = ~250 mg L-dopa per dose. Lower 'nervine' doses: 1–5 g/day standardised extract.

Timing

Divided doses for PD use, like pharmaceutical levodopa

On the label

Stated L-dopa content (typically 10–20% for standardised extract; 4–7% in raw seed powder). Pharmaceutical-grade preferred for therapeutic use.

Ideal for

Adults with early Parkinson's disease in close clinical supervision (specialist context); people exploring Ayurvedic nervine support, with awareness that this is pharmacologically active.

Safety

Carries the full L-dopa pharmacology, nausea, postural hypotension, dyskinesias at higher doses, on-off phenomena. Major interactions with MAOIs (hypertensive crisis), antipsychotics (antagonism), antihypertensives (additive hypotension). Avoid in melanoma (theoretical), psychotic disorders, and in pregnancy. Variable L-dopa content in bulk powder products, quality testing essential. Treat as a medication.

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Evidence

At a glance

Cilia 2017 Neurology crossover RCT (n=18 early PD): single doses of Mucuna seed powder produced motor improvement comparable to levodopa+carbidopa with fewer dyskinesias. Shukla 2009 Fertil Steril RCT (n=60 infertile men) reported improved seminal parameters at 5 g/day for 3 months. Preliminary evidence, no Cochrane review, EMA HMPC monograph or EFSA-authorised health claim covers this indication; cited RCTs are small or in non-tier-1 journals. Useful as honest reference rather than evidence-grade recommendation.

Limitations

Preliminary evidence, no Cochrane review, EMA HMPC monograph or EFSA-authorised health claim covers this indication; cited RCTs are small or in non-tier-1 journals. Useful as honest reference rather than evidence-grade recommendation.

Where to get it

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