At Grass & Co., quality isn't a claim. It's a commitment.

OUR PROMISE

We use only pure, organic fruiting body mushroom extracts, sustainably and ethically sourced. Every batch is rigorously tested for heavy metals, pesticides, gluten, and other contaminants to ensure the highest standards of safety and purity.

We don’t just check what’s not in our products. We prove what is. That means guaranteed levels of active compounds like beta-glucans in every product. No fillers. No fluff. Just full-spectrum functional support you can trust.

Transparency is at the heart of everything we do. We’re proud of the products we’ve developed, and we’ll always show you what’s inside and why it matters.

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LAB TESTS

FOCUS CAPSULES (Lion's Mane)

FOCUS Batch 24-BJU-207 Click here to open
FOCUS Batch KJ2101 Click here to open
FOCUS Batch LG0701 Click here to open
FOCUS Batch LG2501 Click here to open
FOCUS Batch 24-AOL-093 Click here to open
FOCUS Batch 24-BJE-591 Click here to open
FOCUS Batch 25-AVX-005 Click here to open
FOCUS Batch 25-AVX-007 Click here to open
FOCUS Batch 25-AVJ-499 Click here to open
FOCUS Batch 25-AVJ-500 Click here to open
FOCUS Batch 25-AVX-006 Click here to open

FOCUS POWDER (Lion's Mane)

FOCUS Powder Batch 25-ACL-832 Click here to open
FOCUS Powder Batch 24-ACL-831 Click here to open
FOCUS Powder Batch 24-ACO-222 Click here to open
FOCUS Powder Batch 25-ACO-221 Click here to open
FOCUS Powder Batch 25-ACO-220 Click here to open
FOCUS Powder Batch 24-BQM-395 Click here to open
FOCUS Powder Batch 24-BJE-593 Click here to open
FOCUS Powder Batch 329139Click here to open

DREAM CAPSULES (reishi)

DREAM Batch 24-BJE-592 Click here to open
DREAM Batch 24-AOL-095 Click here to open
DREAM Batch KJ2104 Click here to open
DREAM Batch LG2101 Click here to open

RELAX CAPSULES (Maitake)

RELAX Batch 24-AOL-094 Click here to open
RELAX Batch KJ2105 Click here to open
RELAX Batch LF2601 Click here to open

POWER CAPSULES (shiitake)

POWER Batch KJ2102 Click here to open

BIOME CAPSULES (chaga)

BIOME Batch KJ2103 Click here to open
BIOME Batch LH1701 Click here to open

BIOME POWDER (chaga)

BIOME Powder Batch 328419 Click here to open

Lab Testing at Grass & Co.

Every batch of our mushroom capsules and powders is independently tested for both composition and safety, with results published on this page.

What We Measure

Mushrooms are rich in natural carbohydrates called polysaccharides. These include:

  • Beta-Glucans – key polysaccharides found in mushroom fruiting bodies.
  • Alpha-Glucans – starch-type polysaccharides, often naturally present in the mushroom structure.
  • Total Glucans – the combined profile of both beta- and alpha-glucans.

We measure beta- and alpha-glucans separately using the Megazyme β-Glucan assay (K-YBGL). This provides a clear picture of each mushroom’s carbohydrate composition, rather than reporting only “total polysaccharides,” which can overstate the presence of bioactive compounds.

Safety & Purity

Every batch also undergoes a safety screen to confirm it meets strict quality standards:

  • Heavy Metals – lead, mercury, cadmium, arsenic (ICP-MS methods).
  • Pesticide Residues – multi-residue analysis (LC-MS/MS & GC-MS/MS).
  • Microbiology – bacteria, yeast, and mould checks (ISO methods).
  • Mycotoxins – aflatoxins and ochratoxin A (LC-MS/MS).
  • Allergens & Gluten – verified gluten-free where relevant (ELISA).
  • Residual Solvents – where extracts involve solvent use (GC-FID).
What the Results Show

Every Certificate of Analysis (COA) we publish includes three values:

  • % Beta-Glucan – typically 10–50% across our extracts.
  • % Alpha-Glucan – usually around 28%.
  • % Total Glucan – consistently close to 50%.

These figures reflect the natural carbohydrate profile of fruiting body mushroom extracts. Each species has its own pattern, for example, Lion’s Mane usually falls in the 20–25% range, Shiitake is higher, and Chaga is lower.

By testing every batch and publishing the COAs in full, we confirm our products are made from 100% fruiting bodies, with no fillers, grain, or mycelium.

Mushroom Profiles

Each mushroom species has its own glucan signature:

  • Lion’s Mane – moderate beta-glucans with additional characteristic compounds.
  • Reishi – glucans alongside naturally occurring triterpenes.
  • Chaga – glucans plus polyphenols and melanin.
  • Cordyceps – glucans plus nucleoside compounds such as cordycepin.
  • Maitake & Shiitake – among the highest in beta-glucan content.

Our batch testing reflects these natural differences across species.

Transparency Promise
  • Independent testing for every batch.
  • COAs published in full.
  • Safety, purity, and composition results reported clearly.

No fillers, no hidden grain, no unverified numbers, just independently tested mushroom extracts.

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