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β-glucan 375mgper serving £1.67mycelium
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Buying Reishi in a Mushroom Capsule: what the research says
Reishi (Ganoderma lucidum) has the longest documented history of any functional mushroom — over 2,000 years in Traditional Chinese Medicine — and one of the broadest evidence bases. Clinical research focuses on immune modulation, cortisol reduction, sleep quality, and fatigue. The primary actives are triterpenes (ganoderic acids) and beta-glucans; the triterpene content is almost entirely absent from mycelium-on-grain products. Dose ranges in human trials vary widely (1,500–9,000 mg per day of whole dried mushroom equivalent), making standardised extract comparisons important. Reishi is also commonly found as spore oil — a concentrated form targeting different bioactive fractions — but whole fruiting body hot-water extraction is the best-evidenced form for immune and stress outcomes.
What to look for
- 1.Hot-water extracted fruiting body — the method that preserves both beta-glucans and triterpenes
- 2.Declared triterpene percentage (ganoderic acids) on the lab report, not just beta-glucan alone
- 3.Clear dose per serving — the effective range in trials is well above what many capsules provide
What matters in a mushroom capsule
- 01Capsule size and serving count: a standard capsule holds 500–700 mg. For ingredients requiring 1,000–3,000 mg per day (cordyceps, reishi), check whether the serving size is 1 capsule or 2–4. Some brands quote per-capsule amounts that require 4 daily capsules to reach clinical dose — making per-day cost and pill burden considerably higher than they appear.
- 02Extract vs. whole mushroom powder: capsules can contain either extracted or non-extracted mushroom material. Extract capsules (10:1, 8:1) are more concentrated; ensure the dose in mg refers to the extract, not the pre-extraction equivalent weight, to compare products accurately.
- 03Third-party testing declaration: for capsule products, look for brands that display a current Certificate of Analysis on their website, confirming the contents match the label. This is the clearest indicator of manufacturing quality and transparency.
Want to go deeper on the research behind Reishi?
Read the Reishi evidence guide →Reishi Mushroom Capsule questions answered
How long does Reishi take to work?+
Human trials examining Reishi for immune modulation and fatigue typically run for 8–12 weeks, and most measurable changes in immune markers or self-reported fatigue occur after 4–8 weeks of consistent daily use. Reishi is not an acute stimulant — its effects are cumulative and most consistent when taken daily at therapeutic doses (1,500 mg+ per day of standardised extract).
Can you take Reishi before bed?+
Yes — Reishi is one of the few functional mushrooms with clinical evidence for sleep quality improvement. Its triterpene compounds (ganoderic acids) are thought to modulate GABA pathways and reduce cortisol, both relevant to sleep onset. Several trials have specifically tested evening Reishi supplementation and found improvements in sleep duration and subjective sleep quality. This makes it a reasonable choice as an evening supplement for stress and sleep goals.
Information on this platform relates to nutritional composition and public disclosure practices only. It is not medical advice. No claims are made about the therapeutic efficacy, safety, or suitability of any product. Always consult a qualified healthcare professional before taking any supplement.