Spacegoods Review 2026: Honest Verdict on Rainbow Dust

This Spacegoods review finds that Rainbow Dust is a sweet, no-brew powder that mixes caffeine with lion's mane, chaga and cordyceps extracts, KSM-66 ashwagandha and maca, at £1.63 a serving one-off. It tastes best with milk and suits you if you want one convenient scoop. Its headline 1,000mg of lion's mane is a dried-mushroom equivalent, and by ingredient order the real extract is under 300mg.

I founded Balance Coffee in 2020, and it makes its own Lion's Mane Coffee. This review is editorially independent. Spacegoods is assessed on its own merits, and where it does something well, I will say so plainly.

My name is James Bellis, and I have been in coffee since 2012. I spent five years finding the best flat white in every town from Inverness to Exeter while selling espresso machines for Sanremo UK, and I have visited almost 300 roasteries across the country. My writing has been featured in Forbes, so you are reading someone who has judged a lot of cups.

I tested Rainbow Dust for four weeks through The Editor Lab, then reviewed the ingredient list against Spacegoods' own help-centre recipes in October 2026. Where a finding comes from the label rather than the cup, I tell you so.

'Mushroom coffee' can mean almost anything. A token sprinkle of mushroom powder and a meaningful extract dose can sit behind the same label, so the first thing I read on any pack is the ingredient list, and you should read it too.

By James Bellis, Coffee Writer & Biohacker at Balance Journal

Spacegoods is a UK adaptogenic supplement brand founded by Matthew Kelly in 2022. It is a Dorset-based brand, with its contact address in Poundbury, Dorchester, and it launched with one product: Rainbow Dust, a powder blending functional mushrooms, adaptogens and caffeine. You will find the full formula on the Spacegoods product page.

The growth was fast. Spacegoods reported more than 30,000 customer orders and £1.4m in revenue from that single product in less than its first year, according to Yahoo Finance UK. That traction tells you the marketing works, which is separate from whether the label holds up for you.

Rainbow Dust now comes in Coffee, Chocolate, Coffee Caramel, Vanilla Cinnamon and Decaf Coffee, so you can pick a flavour that suits your morning. The wider range includes Astro Dust for sleep, Matcha Dust, Hydro Dust, Glow Dust and Moon and Star Chews. Rainbow Dust remains the core product, so it is the focus of this review.

Spacegoods describes Rainbow Dust as vegan, gluten-free and free of added sugar. You can buy it direct, and it is also stocked by Holland and Barrett, Boots, Amazon UK and Ocado, which makes it easier to try than most mushroom coffees. A 60-day money-back guarantee sits behind direct orders, which lowers the risk if you dislike the taste.

I bought Rainbow Dust Chocolate (240g, 30 servings) directly from spacegoods.com and used it for four weeks. Each serving was one 8g measure (Spacegoods says one tablespoon) stirred into 250ml of hot water. I also tried it with oat milk and blended cold, and I recorded flavour, mixability and how easy it was for you to use every day.

Because Coffee is now the lead flavour on spacegoods.com, I also checked its label, so you can see where the two recipes differ. I did not try to measure long-term effects on focus or mood, because a personal trial is not a clinical study, and this review will not pretend otherwise.

That split matters for how you read the rest of the page. Taste, mixing and sweetness come from the Chocolate tub I used for four weeks. Ingredient order, dose and coffee base come from the labels of both flavours, which are public and which you can check yourself.

If you expect a coffee, you get a sweet chocolate drink, and several buyers say the same. The first thing you notice with Rainbow Dust Chocolate is the sweetness, which hits before the cocoa and before anything earthy. Spacegoods sweetens it with stevia, and it is not subtle.

The Chocolate flavour contains no brewed or instant coffee at all. Its caffeine comes from coffee extract, which is why it drinks like a hot chocolate sachet rather than a functional coffee. If you normally drink black coffee or unsweetened cacao, that first impression will feel closer to a dessert than a morning cup.

Past the sweetness, the cocoa is rich enough to carry the drink. A faint bitterness sits underneath that reads as dark cacao rather than mushroom, and the smell is drinking chocolate with a dry, earthy note that fades after the first few sips. You can taste where the cocoa ends and the mushroom begins, though the line is thin.

Mixed into hot water, Rainbow Dust dissolves reasonably well with a short stir. A small amount of sediment settles at the bottom of the cup, and you notice it more in water than in milk. With oat milk the drink improves noticeably, because the milk softens the stevia edge and rounds out the body into something you could drink daily.

The taste polarises people, so weigh the ratings before you buy. Spacegoods holds 4.5 out of 5 on Trustpilot UK from 9,776 reviews (October 2026), and 4.4 from 1,483 reviews on Holland and Barrett for the Chocolate flavour.

Read the lower-rated comments and you find the same split between buyers who enjoy it and buyers who call it overly sweet. If you are sensitive to stevia, try a 7-day pack before you commit to a full tub.

Spacegoods publishes its full ingredient panel, which is a good sign in a category where transparency is not universal. The doses and the order of the ingredients tell a more complicated story, and you need both to judge the product. Here is what the label says per 8g serving, and what I make of it.

Spacegoods prints "Lions Mane ... Fruiting body mushroom extract ... 1000mg" on its product page, and you will see the same number in its marketing. Its help-centre ingredient lists, for both the Chocolate and the Coffee recipe, put Lion's Mane Mushroom 5:1 Extract after the ashwagandha.

UK labels list ingredients by weight, heaviest first, and the product page gives the ashwagandha as 300mg. You can check that order on the help-centre pages yourself.

That order means the lion's mane extract weighs less than 300mg per serving. A 5:1 extract takes five parts of dried mushroom to make one part of extract, so 1,000mg of dried mushroom is 200mg of extract. The 1,000mg on the pack is therefore a dried-mushroom equivalent, not 1,000mg of extract, and you should read the real extract as under 300mg by ingredient order.

The same caution applies to the 1,000mg of chaga and cordyceps. The help centre lists both as 4:1 extracts placed after the 250mg maca, and the product page calls the chaga 12:1. The two Spacegoods sources do not fully match, so you will see no computed milligram figure for either from me.

For context on lion's mane, the best-known human trial gave older adults with mild cognitive impairment about 3g a day of dried lion's mane powder for 16 weeks (Mori et al., 2009). One Rainbow Dust serving carries a dried equivalent of about a third of that daily amount, and the real extract is smaller still. You can read more about the mushroom itself in our guide to lion's mane benefits and its side effects.

The ashwagandha is the better news for you, and it corrects what an earlier version of this review said. The product page now states KSM-66 ashwagandha at 300mg, and the KSM-66 stress trial used 300mg twice a day for 60 days (Chandrasekhar et al., 2012).

One serving gives you half of that daily amount, and Spacegoods suggests one to two servings a day. That is a real, branded ashwagandha dose at the lower end of what the trial used.

The coffee half deserves the same care when you read the pack. In the Coffee flavour, spray-dried instant coffee is the first and largest ingredient, and Spacegoods does not declare how much of the blend it is.

The Chocolate flavour I tested is cocoa-first, so it carries caffeine from coffee extract and no coffee as such. Spacegoods calls Rainbow Dust a 'mushroom coffee alternative' on its own page, and that is a fair description for you to keep in mind.

Spacegoods does several things well here, and you should weigh them against the lion's mane finding. It publishes a full ingredient list and per-serving figures, it uses fruiting-body extracts, and it names KSM-66 rather than a generic ashwagandha powder. It also says its cordyceps is Cordyceps sinensis, which matters for the UK rules covered in the FAQ below.

None of this is a health claim. Lion's mane and ashwagandha have no authorised health claim on the Great Britain nutrition and health claims register, so read anything you notice as personal experience, not a promise.

Put the label next to its rivals and the picture is clearer for you. DIRTEA states 1,000mg of lion's mane extract per 2.5g serving, and London Nootropics Flow Coffee states 250mg of lion's mane extract. By ingredient order, the real extract in Spacegoods sits closer to London Nootropics than the headline suggests.

The habit worth keeping from this section applies to any mushroom coffee you pick up. Look for the extract ratio, find where the mushroom sits in the ingredient order, and ask whether the milligram figure is extract or a dried equivalent. A brand that answers all three on the pack is giving you something you can compare, and a brand that answers none is asking you to trust the headline.

Rainbow Dust costs £49.00 for a 240g tub of 30 servings when you buy once from spacegoods.com (checked 6 October 2026). The page also shows lower per-serving figures on its subscription and multi-month plans. If you would rather skip a plan, Holland and Barrett and Boots list the 240g tub at £39.00, which is £1.30 a serving.

Here is how that compares with two other mushroom coffees you might weigh it against:

Spacegoods is the most expensive of these three per serving at the one-off price. The question is whether the formula justifies the premium, and you now know the lion's mane headline is a dried equivalent. At £1.63 you pay for convenience, a real ashwagandha dose and a wider ingredient list, not for more lion's mane extract.

The tub also empties faster if you follow the brand's own guidance. Spacegoods suggests one to two servings a day, and at two servings a day a 30-serving tub lasts 15 days. At the one-off price that doubles your monthly spend to £98, so work out which dose you plan to take before you compare it with a cheaper pouch.

Read the subscription terms before you order. The multi-month and subscription prices are plans, and several Trustpilot reviewers say they did not notice they had joined one. You can manage a subscription by logging in to your spacegoods.com account, and the 60-day money-back guarantee gives you a window to change your mind.

One reviewer also reports the subscription price resetting when they changed flavour. That is one customer's account, and the company has helped other customers adjust their price. If you plan to switch flavours, check the price on your next order before you confirm it.

Spacegoods suits a specific type of buyer. If you want a single-scoop morning drink that combines caffeine, mushroom extracts and a chocolate flavour without brewing anything, Rainbow Dust delivers that. The convenience is real, and the lion's mane dose is smaller than the headline.

It works for people who are new to functional mushrooms and want to try several ingredients at once without buying four separate supplements. It also suits you if you dislike the taste of coffee but still want a caffeinated drink with milk. Buy it for the convenience and the KSM-66, and treat the lion's mane as a small extra.

It is a poor fit if you are caffeine-sensitive, pregnant or breastfeeding, or taking medication, because each serving carries 80-120mg of caffeine plus several active plant extracts. Ask a GP or pharmacist before you start, and do not read this review as medical advice.

Skip it if you want a high lion's mane extract dose, prefer actual coffee over a sweet powder, or react badly to stevia. If you already brew coffee at home and want mushroom benefits, a ground mushroom coffee from our best Lion's Mane coffee UK guide will likely serve you better, both in coffee quality and in what you get per cup.

The two brands you are most likely to weigh against Spacegoods are London Nootropics and DIRTEA. Both ranked above Spacegoods in our scoring, and the reasons are specific.

London Nootropics Flow Coffee lists a 250mg lion's mane extract from Hifas da Terra, rich in beta-glucans, in soluble coffee with 6% finely ground coffee. It costs £1.00 a sachet on the 60-pack, so you pay less per serving than Spacegoods at the one-off price.

On real lion's mane extract the two products are closer than the headline suggests, which matters if you buy on dose, and London Nootropics ranks #6 against Spacegoods at #8. Read our London Nootropics review for the full comparison.

DIRTEA states 1,000mg of dual-extracted lion's mane fruiting-body extract per 2.5g serving, with more than 40% beta-glucans. Its Coffee Super Blend is 56% coffee and costs you 63p a serving on the 150g pouch.

DIRTEA ranks #2 in the ranking, ahead of Spacegoods on dose and on value. It dissolves like an instant, but its page does not say whether the coffee powder is spray-dried or freeze-dried, and you should know that before you buy. Our Dirtea review has the detail.

If lion's mane dose and price per serving decide it for you, both rivals beat Spacegoods. If you want ashwagandha and a three-mushroom blend in one scoop, Spacegoods is the only one of the three that offers it.

Spacegoods holds 4.5 from 9,776 reviews on Trustpilot UK and 4.4 from 1,483 on Holland and Barrett. I read the three-star reviews on Trustpilot and the Chocolate reviews on Holland and Barrett, because those show you where the product disappoints and where it delights. These quotes are customer experience, not health claims, and they are posted exactly as written.

Nikolai, Trustpilot UK, 3 stars, 1 July 2026:

Mr T, Trustpilot UK, 3 stars, 25 August 2026:

Michael, Trustpilot UK, 3 stars, 30 August 2026:

Phil, Holland and Barrett, verified purchaser of Rainbow Dust Chocolate:

Peter, Trustpilot UK, 3 stars, 28 September 2026:

Philip, Trustpilot UK, 3 stars, 13 June 2026:

Four of these six describe taste the way I do: sweet, best with milk, closer to a hot chocolate than a coffee. The last two feed the dose and subscription sections above, and neither is part of the score you see in the verdict.

Spacegoods Rainbow Dust is convenient, sweet and pleasant with milk, with a real KSM-66 ashwagandha dose and a lion's mane figure that overstates its extract. It ranks #8 of 10 in our mushroom coffee ranking, and you can see the full scores in the table below.