My take on Brainstoorm: a good low-caffeine ritual, not a proven nootropic. The 20 mg of caffeine per cup is the drink’s only predictable effect. As for the rest, the label lists more than 10 g of ingredients in a serving weighing 6 to 8 g, and no trial has tested the complete formula.
The brand is a site partner, and that’s precisely why this review needs to stand without the commission. Mushroom coffee marketing sells “focus without a crash” and “neurogenesis.” The cited studies involve different doses, different preparations and sometimes different species.
Mush’N’Go publishes a raw-material document identifying its Cordyceps as C. sinensis, not C. militaris. This information does not replace testing of the finished pouch. I no longer rank Brainstoorm as a “favorite” based on its formula or price: no clinical trial of the complete drink has demonstrated a cognitive benefit, and an affiliate code doesn’t fix the transparency problem. It can remain an option for a low-caffeine ritual, if the ingredients suit your circumstances and you’re comfortable with the price you pay. Check the label on the batch you receive, the warnings and the final checkout total.
Which Mush’N’Go product is being reviewed?
Mush’N’Go sells two similar drinks under the Brainstoorm name. Both contain Lion’s Mane, Cordyceps, Chaga, maca and 20 mg of caffeine, but their bases and serving sizes differ.
Here are the figures listed by the brand:
| Product | Stated serving size | Servings | Stated caffeine |
|---|---|---|---|
| Brainstoorm, chocolate-hazelnut flavor | 8 g | 30 | 20 mg |
| Brainstoorm Coffee, coffee flavor | 6 g | 30 | 20 mg |
When checked on October 19, 2026, the product pages displayed different prices depending on pack size (30 or 60 servings), one-time purchase and subscription, and some per-cup price claims did not match the pouch price. Calculate the price per cup yourself at checkout: final total divided by the number of servings. The affiliate code JEY links to the store, but whether it applies at checkout must be checked when you buy. It is not used to calculate a reference price or justify a recommendation. You’re paying for a convenient ritual with less caffeine than a strong coffee, not proven nootropic efficacy.
Current composition: a point that needs clarification
The chocolate Brainstoorm page lists, among other ingredients, 1,000 mg of each of the three mushrooms, 3,000 mg of maca, 2,708 mg of acacia, 1,400 mg of cocoa, 200 mg of ashwagandha, 25 mg of rhodiola and 20 mg of caffeine. That adds up to 10,353 mg, before even counting xylitol and vitamin B5, for a stated serving size of 8 g.
Brainstoorm Coffee has the same problem. The listed weights for the mushrooms, chicory, maca, acacia, ashwagandha and caffeine total 10,449 mg, excluding xylitol, flavoring and vitamin B5, even though the stated serving weighs 6 g.
This contradiction could be explained by “raw-material equivalents” calculated by applying an extraction ratio to the actual weight. However, that does not confirm the composition. The page describes what a serving contains without clearly distinguishing the weight added, dry-material equivalent and analytically measured content. Without that distinction, three questions remain unanswered:
- what actual weight of each extract is in the cup
- whether the 1,000 mg refers to an extract or a raw-material equivalent
- what quantity of measured compounds, such as beta-glucans, is actually provided
A 20:1 ratio does not automatically mean an extract is twenty times more effective. It describes a manufacturing relationship, not a clinically relevant content level or guaranteed bioavailability. The brand needs to distinguish these values and provide batch testing. As things stand, we can neither compare the extracts accurately milligram for milligram nor present the blend as superior because it contains more ingredients.
Has Cordyceps really been removed?
No. The Brainstoorm and Brainstoorm Coffee pages still list 1,000 mg of “Cordyceps” per serving. The correction concerns the species, not whether the ingredient is present.
The file made public by Mush’N’Go for this raw material states “Cordyceps Sinensis Extract Organic,” fruiting body, water extraction, a 20:1 ratio and more than 30% polysaccharides. The currently accepted taxonomic name is Ophiocordyceps sinensis. This document looks like a supplier specification sheet dated 2022, not a recent certificate of analysis specific to each batch of Brainstoorm.
The regulatory distinction matters. The European catalogue currently classifies the mycelium and fruiting body of O. sinensis as not novel in food supplements. By contrast, the mycelium and fruiting body of Cordyceps militaris are listed as novel foods not yet authorized.
Mush’N’Go therefore documents its ingredient as C. sinensis, which addresses the main regulatory question raised around C. militaris. However, its “Scientific Studies” page still includes a section devoted to C. militaris. This literature provides context on the Cordyceps group, without automatically validating the O. sinensis extract or the complete formula.
What the studies actually suggest you can expect
Lion’s Mane: a signal, not demonstrated neurogenesis
There are a few small human trials on Lion’s Mane and its cognitive effects · FR. A Japanese study used 3 g of powder daily in 30 adults aged 50 to 80 with mild cognitive impairment. Scores improved over 16 weeks, then declined after supplementation stopped.
In 41 healthy young adults, 1.8 g over 28 days produced only a signal on certain measures, with several null results. These data do not prove nerve repair or neurogenesis in Brainstoorm users. They also involve preparations that the product page does not allow us to compare properly with the product’s actual dose.
Cordyceps: mixed human results
A 2010 trial tested 1 g daily of CS-4, a fermentation-derived preparation associated with C. sinensis, in 20 adults aged 50 to 75. Some exercise thresholds improved, but VO2 max did not. In 22 trained cyclists, 3 g daily of CS-4 for five weeks improved neither peak VO2, ventilatory threshold nor time-trial performance.
The often-cited trial on C. militaris used 4 g of a mushroom blend. After one week, no primary outcome was significantly better. Only ten volunteers continued for three weeks, with a favorable signal. This does not demonstrate that the stated 1,000 mg of C. sinensis in Brainstoorm provides steady energy.
Chaga and adaptogens: plenty of extrapolation
Chaga’s antioxidant promises come mainly from cell and animal studies. No solid clinical evidence shows that a cup reduces cortisol, inflammation or bloating. Maca, ashwagandha and rhodiola each have their own body of research, but adding separate studies together does not demonstrate synergy.
The complete formula has not been tested in a published randomized trial. The “91 studies” advertised by the brand involve different ingredients, species, extracts and sometimes experimental models.
The most predictable effect comes from caffeine
Twenty milligrams of caffeine is a low dose compared with an espresso or filter coffee. Someone used to several coffees may therefore feel less stimulated, or even experience withdrawal symptoms if they abruptly replace their usual intake.
This dose can still matter for a sensitive person, especially late in the day. Caffeine’s half-life varies considerably, and its effect on sleep depends on the dose, timing and individual metabolism. Use our caffeine window calculator rather than a universal cutoff time.
The “crash-free” claim is unproven. A crash depends on factors including sleep, usual dose, meals, tolerance and withdrawal. No mushroom has been shown to pharmacologically neutralize the drop in alertness that can follow caffeine.
If you try it despite these limitations, compare Brainstoorm with a drink providing the same amount of caffeine, not your old large coffee. Keep timing, breakfast and sleep consistent for one week per condition. Track alertness, anxiety, digestive comfort and the time you fall asleep. This comparison does not replace a clinical trial, but it helps avoid crediting the mushrooms for the simple effect of reducing caffeine or changing your routine.
Tolerability and precautions
Brainstoorm is a complex blend. The more ingredients it contains, the harder it becomes to identify the cause of a reaction. Points to watch include:
- caffeine if you experience anxiety, palpitations or easily disrupted sleep
- ashwagandha if you have thyroid disease or liver disease, are pregnant or take medication that could interact
- rhodiola with certain psychotropic medications
- mushrooms if you have an allergy or digestive reaction
- xylitol and fiber, which can cause bloating or diarrhea in some people
Ask a doctor or pharmacist for advice if you take medication, are pregnant or breastfeeding, or have a liver, kidney, autoimmune, metabolic or psychiatric condition. Stop using it if you develop a rash, breathing difficulties, persistent palpitations, jaundice or significant digestive symptoms.
Our verdict scorecard
Here is the assessment behind our conclusion:
| Criterion | Assessment | Why |
|---|---|---|
| Formula transparency | Needs clarification | Extraction equivalents appear to be mixed with actual weights |
| Cordyceps identity | Fairly well documented | The supplier sheet specifies C. sinensis and the fruiting body |
| Match with studies | Partial | The data cover several Cordyceps preparations |
| Evidence on the finished product | Not studied | Typical for this category of drinks |
| Caffeine | A strength | Only 20 mg stated per serving |
| Price | Check at checkout | Prices vary by pack size and subscription |
| Daily use | Convenient, but depends on the individual | Multiple ingredients and possible interactions |
Brainstoorm can replace a flavorful ritual and reduce caffeine if the stated 20 mg is accurate. It cannot be presented as a proven tool for neurogenesis, adrenal protection or mitochondrial optimization.
What would make Brainstoorm a truly verifiable product
The first correction is simple: publish a table in which the actual weights add up to no more than the serving weight. If the brand wants to communicate dry-material equivalents, two separate columns should show the weight of extract added and the raw-material equivalent. The extraction ratio must be linked to each ingredient, not used as an implicit multiplier.
The second correction concerns testing. A specification sheet describes the expected limits for a raw material. A certificate of analysis reports the results measured for a batch. For Brainstoorm, truly verifiable documentation would link the number on the pouch to the following checks: botanical or fungal identity, beta-glucans, alpha-glucans, caffeine, heavy metals, pesticides and microbiological testing.
The third correction concerns evidence. The science page should separate directly applicable human trials, studies on another species and preclinical research. A publication on C. militaris should not sit under a claim made for an ingredient documented as C. sinensis without a visible explanation.
These documentation improvements would make scientific comparisons clearer. What can currently be verified remains a stated caffeine content of 20 mg, 30 servings and a supplier document identifying the Cordyceps species. The price and the label on the delivered product may change.
The Verdict. If you want to cut your caffeine sharply while keeping a coffee-flavored ritual, Brainstoorm is an option, not a necessity. A weaker coffee or decaf often costs less; a single-ingredient product is easier to assess. Ask for the actual extract weights and compare the final price before buying. The verdict would be the same without a commission.
Commercial transparency: the site has an affiliate code, JEY, historically advertised as −15%. Its application at checkout was not verified during this update. This review therefore includes neither a discounted total nor a call to buy. To compare the product with other drinks available in France, see the cross-brand mushroom coffee comparison · FR.
