Generated with AI from public data · Updated 11 May 2026
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Mushroom Coffee
Mushroom Coffee with Lion's Mane
Four Sigmatic
Species: Lion's Mane, Chaga
£15.00 one-off£13.50 subscription
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0.00
/10Limited Disclosure
Key information such as beta-glucan content is not publicly available.
This score reflects disclosure completeness — not a verdict on product quality.
Scored: May 2026
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Score breakdown
Score Breakdown
Ingredient Quality5.8
The product uses fruiting body as its source type for both Lion's Mane and Chaga, which scores the maximum 4 points for source type. The extraction method is hot water extract, which scores 1 point. Beta-glucan percentage is not publicly disclosed, so that dimension scores 0. Total mushroom content is 500mg per serving, which falls at the lower boundary of the 500–999mg range and scores 1 point for dose adequacy. Chaga typically benefits from dual extraction to capture triterpenes, which hot water extraction alone does not fully deliver.
Mushroom source type4.0/4
Beta-glucan %0.0/4
Extraction method1.0/2
Dose adequacy1.0/2
Transparency3.3
The brand publicly states the source type and extraction method, and discloses the country of origin as the USA, contributing 4 raw transparency points. No COA is publicly available, and beta-glucan percentage is not publicly disclosed, leaving both of those fields at 0. Three or more core fields are missing (beta_glucan_pct, coa_available, and beta_glucan_source all unspecified or not disclosed), triggering a transparency penalty of minus 1 point. The organic certification claim is made without naming a certification body.
Certificate of Analysis0.0/3
Beta-glucan disclosed0.0/2
Source stated2.0/2
Extraction stated1.0/1
Origin stated1.0/1
Value2.0
Cost per 100mg beta-glucan cannot be calculated because beta-glucan percentage is not publicly disclosed. The price per serving is £1.50 on a one-off basis. The subscription saving is 10%, which is below the 15% threshold used to apply subscription pricing, so the one-off price is used. At £1.50 per serving with no beta-glucan data available, the value score is based on price per serving only and scores 1 point, with a further 1-point deduction applied for the absence of beta-glucan disclosure.
Trust3.0
The Trustpilot score is 4.4 stars from 200 reviews. This falls in the 4.0–4.4 band but with fewer than 500 reviews, so it scores 2 points. Third-party testing is not publicly disclosed and no COA is available, scoring 0 points for that dimension. The product is stated as organic certified, but no certification body is named, so it scores 1 point rather than the maximum 2.
Trustpilot score2.0/5
Third-party testing0.0/3
Organic certification1.0/2
Consumer Experience7.0
The subscription is available with no lock-in and no minimum term stated, and the cancellation policy field is not publicly disclosed, though lock-in is recorded as false, scoring 4 points. A 30-day money-back guarantee is in place, scoring the maximum 3 points for return policy. The product does not ship to the UK, scoring 0 points for UK availability.
Subscription flexibility4.0/4
Return policy3.0/3
UK availability0.0/3
Overall3.9/10
By dimension
Ingredient Quality35%
5.8Standardisation, extraction method, form specificity
Transparency30%
3.3Third-party testing, CoA availability, label accuracy
Value20%
2.0Price per active dose relative to category
Trust10%
3.0Accreditations, regulatory compliance, brand history
Consumer Experience5%
7.0Return policy, customer support availability
Key facts
Publicly available data
- Mushroom source
- fruiting_body
- Extraction method
- water_extract
- Beta-glucan %
- Not publicly disclosed
- Total mushroom/serving
- 500mg
- COA available
- No
- Organic certified
- Yes
- Caffeine per serving
- 75mg
- Trustpilot
- 4.4★ (200 reviews)
Score reasoning
Ingredient Quality
The product uses fruiting body as its source type for both Lion's Mane and Chaga, which scores the maximum 4 points for source type. The extraction method is hot water extract, which scores 1 point. Beta-glucan percentage is not publicly disclosed, so that dimension scores 0. Total mushroom content is 500mg per serving, which falls at the lower boundary of the 500–999mg range and scores 1 point for dose adequacy. Chaga typically benefits from dual extraction to capture triterpenes, which hot water extraction alone does not fully deliver.
Transparency
The brand publicly states the source type and extraction method, and discloses the country of origin as the USA, contributing 4 raw transparency points. No COA is publicly available, and beta-glucan percentage is not publicly disclosed, leaving both of those fields at 0. Three or more core fields are missing (beta_glucan_pct, coa_available, and beta_glucan_source all unspecified or not disclosed), triggering a transparency penalty of minus 1 point. The organic certification claim is made without naming a certification body.
Value
Cost per 100mg beta-glucan cannot be calculated because beta-glucan percentage is not publicly disclosed. The price per serving is £1.50 on a one-off basis. The subscription saving is 10%, which is below the 15% threshold used to apply subscription pricing, so the one-off price is used. At £1.50 per serving with no beta-glucan data available, the value score is based on price per serving only and scores 1 point, with a further 1-point deduction applied for the absence of beta-glucan disclosure.
Trust
The Trustpilot score is 4.4 stars from 200 reviews. This falls in the 4.0–4.4 band but with fewer than 500 reviews, so it scores 2 points. Third-party testing is not publicly disclosed and no COA is available, scoring 0 points for that dimension. The product is stated as organic certified, but no certification body is named, so it scores 1 point rather than the maximum 2.
Consumer Experience
The subscription is available with no lock-in and no minimum term stated, and the cancellation policy field is not publicly disclosed, though lock-in is recorded as false, scoring 4 points. A 30-day money-back guarantee is in place, scoring the maximum 3 points for return policy. The product does not ship to the UK, scoring 0 points for UK availability.
Not publicly disclosed
- Beta-glucan percentage
- Third-party beta-glucan verification
- Certificate of Analysis (COA)
- Dose per mushroom species
- Mushroom species (scientific name)
- Subscription cancellation policy
- Trustpilot rating
- Named certification body
How Four Sigmatic could improve this score
Path to improvement
+0.1 points to reach Partial Disclosure
+0.1
pts needed
- 1
Publish a beta-glucan percentage for each species, verified by a named third-party laboratory — this would add up to 6 points across ingredient quality and transparency scores.
- 2
Make a full-panel COA publicly available from an ISO 17025-accredited laboratory covering beta-glucans, heavy metals, and microbial contamination — this would add up to 5 points across transparency and trust scores.
- 3
Name the organic certification body (for example, USDA Organic or equivalent) — this would add 1 point to the trust score.
- 4
Clarify the subscription cancellation policy publicly — this would support the subscription flexibility score and improve data confidence.
- 5
Enable shipping to the UK — this would add 2–3 points to the consumer experience score for UK-based users.
Actions that would raise this brand's disclosure score. See methodology for full scoring rules.
This platform is independent and is not affiliated with, endorsed by, or sponsored by any brand listed. Scores reflect publicly disclosed information — not product quality, safety, or efficacy. Read the full methodology →
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.