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DIRTEA Reishi is a single-ingredient mushroom powder made from 100% Reishi (Ganoderma lucidum), one of the most studied adaptogenic fungi.
DirteaReishi
The No7 Prime Forever Skin Preservation Collection is built around a proprietary Antioxidant Peptide blend — described by No7 as their strongest ever broad-spe…

Spermidine is a naturally occurring polyamine compound found in wheat germ and a range of other food sources.
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Set up Profile nowDIRTEA Reishi is a single-ingredient mushroom powder made from 100% Reishi (Ganoderma lucidum), one of the most studied adaptogenic fungi. Reishi has a long history of use in East Asian medicine and is now studied in modern research for its potential to support stress regulation, immune modulation, and sleep quality. As an adaptogen, it is thought to help the body maintain balance under physiological and psychological stress, rather than acting as a stimulant or sedative.
This is a practical choice for people who find themselves running on cortisol — those with demanding schedules, disrupted sleep, or a sense that recovery is lagging. It fits naturally into an evening wind-down routine or as a daily baseline supplement for immune resilience. Because it contains no caffeine, it can be taken at any time of day without affecting sleep architecture.
DIRTEA focuses on functional mushroom products, and their Reishi powder uses a single-ingredient format, which avoids the noise of multi-ingredient blends and makes it straightforward to assess whether the product is working for you. For anyone who has confirmed elevated stress markers or immune vulnerability through testing, a Reishi powder like this offers a clean, food-based way to begin addressing those findings alongside broader lifestyle changes.
100% Reishi Mushroom
Mix one teaspoon with water, coffee, or another warm drink. It can be taken in the morning or evening — many people prefer it at night given Reishi's association with relaxation and sleep support. Follow any additional guidance on the packaging.
Reishi contains bioactive compounds — primarily triterpenes and beta-glucans — that are studied for their effects on immune signalling and stress response. It is classed as an adaptogen, meaning it is thought to help the body regulate, rather than override, its stress systems. It does not sedate or stimulate.
Either morning or evening works, but many people take Reishi in the evening given its association with relaxation and sleep support. It contains no caffeine, so it will not interfere with sleep if taken later in the day.
Adaptogens are not fast-acting in the way that, say, caffeine is. Most research and clinical experience suggests a consistent daily intake over four to eight weeks gives the clearest indication of benefit. Track how you feel — sleep quality and stress tolerance are useful markers.
Reishi may have mild immune-modulating and anticoagulant properties, so if you are on immunosuppressants or blood-thinning medication, speak to your GP or pharmacist before starting. For most healthy adults it is well tolerated at typical daily amounts.
Powder allows you to adjust your intake more easily and integrates well into drinks or food. The trade-off is slightly less dosing precision than a capsule. Check the packaging for the recommended serving size and stick to it while you assess how the product suits you.
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Overall sentiment
4 days ago
Gentle on a sensitive stomach, and I feel like myself again. I had tried two other glandulars before this and neither sat right.
1 week ago
I was sceptical about glandulars, but my mid-afternoon crash has genuinely eased. One capsule with breakfast and I forget about it.
2 weeks ago
Not a stimulant, which is exactly what I wanted. It took about ten days, then I realised I wasn’t dreading the afternoon any more.
3 weeks ago
Bought after a blood panel flagged a flat cortisol curve. Easy to take, no jitters, and the sourcing is refreshingly transparent.
1 month ago
Training hard through a stressful stretch and this has helped me bounce back between sessions. Already on my second bottle.
1 month ago
No frills, one ingredient, a sensible dose. I appreciate that it is designed to be used for a season rather than forever.
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