Dirtea Review 2026 - A Coffee Roaster's Honest Assessment (UK)

Dirtea makes a competent mushroom coffee with genuine organic Lion's Mane extract and solid retail distribution. The 1,000mg Lion's Mane dose per serving sits below the levels used in the most cited clinical research, and the price - around £0.63 per serving for the Coffee Super Blend - is fair for the category, though not cheap. If you value convenience, a recognised brand, and do not need clinical-strength dosing, Dirtea delivers. If you want higher Lion's Mane doses per serving or a richer coffee experience, there are alternatives worth considering in our best lions mane coffee UK guide.

Dirtea is a UK functional mushroom brand founded by brothers Simon and Andrew Salter. The company launched as a direct-to-consumer supplement business and grew rapidly through social media, building a following of over 600,000 across its channels. Celebrity associations with names like Bear Grylls, Roxie Nafousi, and Stella McCartney helped push awareness into the mainstream wellness space.

The product range spans pure mushroom powders (Lion's Mane, Reishi, Chaga, Cordyceps, Tremella), super blend drinks (Coffee, Cacao, Matcha, Chai), and gummies. All products are manufactured in the UK and distributed from a centre in Northampton. The brand describes itself as using 100% fruiting body extracts with dual extraction (hot water and alcohol), which is a meaningful distinction. Fruiting body extracts contain higher concentrations of active compounds like beta-glucans compared to mycelium-on-grain products that some competitors use.

For this review, I focused on the Coffee Super Blend and the pure Lion's Mane Powder, since those are the two products most relevant to readers comparing best mushroom coffee brands.

We ordered the Coffee Super Blend (150g, 60 servings) and the Lion's Mane Pure Powder (60g, 30 servings) directly from dirteaworld.com. Both were tested over a four-week period through The Editor Lab, our structured review framework. Each product was prepared according to Dirtea's own instructions: 2.5g of the Coffee Super Blend in 200ml hot water, and 2g of the Lion's Mane Powder stirred into hot water or added to a standard brewed coffee.

We assessed flavour, texture, dissolve quality, and daily usability. We did not assess long-term cognitive effects, because a four-week personal trial is not a clinical study and we will not pretend otherwise.

The Coffee Super Blend is an instant-style product. Mix the powder with hot water and you get a drink that sits somewhere between a mild instant coffee and a hot chocolate. There is a light nuttiness and a faint grain quality on the nose. Through the body, the coffee flavour is present but thin. This is not a brewed coffee, and anyone expecting the depth of a pour-over or espresso will find it underwhelming. On the finish, there is a mild earthiness, not unpleasant, but noticeable.

For an instant mushroom coffee, the flavour is acceptable. Dirtea does not taste like dirt, which already puts it ahead of several competitors in the category. The 50mg caffeine per serving means this is closer to a light tea than a standard coffee in terms of stimulant effect.

The Lion's Mane Pure Powder is flavourless by design. It dissolved cleanly in hot water with only light stirring, leaving minimal sediment. Adding it to a freshly brewed coffee did not alter the flavour profile in any noticeable way. This is the more versatile product of the two: you control the coffee quality independently.

The catch: the Coffee Super Blend contains 56% coffee and 40% Lion's Mane extract by weight. That ratio explains the thin coffee body. When you dilute arabica this heavily with mushroom extract and other ingredients, you lose the qualities that make good coffee worth drinking. It functions as a delivery system for the mushroom, not as a coffee experience.

I have calculated these ratios for our own product, so the numbers here jumped out immediately.

Coffee Super Blend (per 2.5g serving):

Lion's Mane Pure Powder (per 2g serving):

The critical question is whether these doses are clinically meaningful. The most cited Lion's Mane study, Mori et al. (2009), published in Phytotherapy Research, used 3,000mg per day of dried Lion's Mane powder and found significant cognitive improvements in older adults with mild cognitive impairment over 16 weeks. A 2023 pilot study published in the Journal of Medicinal Food used 1,800mg daily and reported improvements in working memory. Another trial used 2,400mg daily over 12 weeks with positive results.

Dirtea's Coffee Super Blend delivers 1,000mg per serving. That is below every major clinical trial I could find. Their pure Lion's Mane Powder at 2,000mg sits closer to the research range but still falls short of the 3,000mg benchmark from the Mori study.

Dirtea uses dual-extracted fruiting bodies, which concentrate active beta-glucans more effectively than raw dried powder. This means a direct milligram comparison is not entirely fair - extracted material is more potent gram-for-gram than unextracted powder. But the brand does not publish its beta-glucan percentage per batch, so the actual potency per serving remains unverifiable. Their claim of "over 40% beta-glucans" on the Lion's Mane Powder is promising if accurate, though independent lab results are not publicly available for individual batches.

The maca and ashwagandha in the Coffee Super Blend are listed without individual doses. In a 2.5g total serving where coffee is 56% and Lion's Mane is 40%, that leaves approximately 100mg for everything else combined. At those levels, maca and ashwagandha are present in trace amounts, well below any clinically studied dose for either ingredient.

Dirtea offers a subscription with approximately 42% discount on the Coffee Super Blend, bringing the cost per serving down to around £0.37. That is competitive for the instant mushroom coffee category.

For context, Balance Coffee's Lion's Mane Mushroom Coffee is £21.99 for a 250g bag of ground coffee with 1,500mg of Lion's Mane per serving. A bag makes roughly 16 servings at £1.37 per cup, but you get actual brewed coffee quality plus a higher mushroom dose. London Nootropics sachets sit at around £1.50 per serving. Four Sigmatic's instant range runs between £0.80 and £1.20 per serving depending on the product.

The pure Lion's Mane Powder at £1.27 per serving is premium. You could achieve the same 2,000mg daily dose from several supplement brands at £0.30 to £0.60 per serving. The premium pays for the brand, the organic certification, and the dual extraction process. Whether that premium is justified depends on how much you value those factors over raw cost efficiency.

Dirtea has built a genuinely impressive brand. The social media presence is polished. The Selfridges mushroom bar generated significant press. The celebrity associations bring awareness that benefits the entire functional mushroom category.

The product underneath the marketing is decent, though not exceptional. The coffee quality is limited by the instant format and the heavy dilution with extract powder. The Lion's Mane dosing is adequate but not category-leading. The maca and ashwagandha are effectively decorative at the doses present.

Dirtea holds a 4-star rating on Trustpilot from over 2,700 reviews (as of April 2026), which is solid for a supplement brand and suggests consistent delivery and service.

Where Dirtea genuinely earns respect: the commitment to organic certification, fruiting body extracts, and dual extraction. These are not cheap manufacturing choices. Many mushroom supplement brands cut costs with mycelium-on-grain fillers or skip organic certification entirely. Dirtea does neither. That matters.

Dirtea suits someone entering the functional mushroom space for the first time. The brand recognition provides reassurance. The Coffee Super Blend is simple to prepare. The subscription pricing makes daily use affordable. The retail availability at Boots, Selfridges, and Planet Organic means you can try before committing online.

It is less suited to coffee enthusiasts who care about brew quality, or to anyone seeking clinical-strength Lion's Mane dosing from a single product. If you want a mushroom coffee that tastes like proper coffee, a ground format from a specialty roaster will deliver that. If you want the research-backed 3,000mg daily dose, you will need to supplement beyond what the Coffee Super Blend provides.

Dirtea wins on price per serving and convenience. Balance Coffee wins on coffee quality and Lion's Mane dosing. London Nootropics takes a different approach entirely, blending adaptogens rather than focusing on mushroom potency. Spacegoods and Four Sigmatic offer their own variations, which we assess in their dedicated reviews.

For the full picture across the category, see our best mushroom coffee brands UK roundup.