Four Sigmatic Focus

Verdict

A polished, well-marketed Lion's Mane stack from a recognizable brand, but the formula leans on a multi-ingredient nootropic blend rather than raw mushroom potency, and no public third-party COA was surfaced in our review window.

Best for: Readers already using Four Sigmatic mushroom coffee.

Score breakdown

Each axis is scored 0 to 10. The overall NootroScore weights potency 40%, purity 25%, value 20%, and transparency 15%. See the full methodology.

Potency Beta-glucan content as disclosed on each brand's published Certificate of Analysis, weighed against the label claim.

8/10

Purity Heavy-metals and microbial test results, where the brand publishes a per-batch COA, evaluated against USP-grade thresholds.

8/10

Value Cost per active milligram of beta-glucan, normalized across formats.

7/10

Transparency Sourcing disclosure, public certificate-of-analysis access, and label accuracy.

7/10

What we liked

• + Lion's Mane sourced from log-grown fruiting bodies (per us.foursigmatic.com), not mycelium-on-grain
• + USDA Organic certified across the listed mushroom and adaptogen ingredients
• + Vegan capsules with a clean label, no fillers or grain carriers per brand copy
• + Brand recognition and broad retail distribution lower trust friction for first-time mushroom-supplement buyers
• + Stack includes complementary studied adaptogens (ashwagandha, rhodiola, bacopa) plus L-theanine and B12 in a single capsule

Where it falls short

• − No third-party Certificate of Analysis or beta-glucan percentage published on the product page in our review window
• − Lion's Mane is a blend component (~1500 mg total functional ingredients across 3 capsules), so per-serving Lion's Mane potency is diluted vs mono-ingredient SKUs
• − Premium price tier (around $1.17 per serving on subscribe and save) is high relative to mono-ingredient Lion's Mane competitors
• − Marketing copy is benefit-forward ('brain boosting', 'mental clarity') with limited public data on extract ratio or specific bioactive content
• − Product page does not disclose dual-extract methodology or hot-water vs alcohol extraction details

At a glance

Extract

Dual extract

Beta-glucan content

10%

Serving

2 capsules daily

Servings per bottle

30

Third-party tested

Not disclosed

Vegan

Yes