Mushroom coffee vs coffee: which cup is steady?
The short answer: if you love coffee and hate the crash, a mushroom coffee with less caffeine keeps the ritual and gives you the lift without the crash. If you want no caffeine at all, a caffeine-free cup with a real mushroom dose does the 4pm job. Here is the difference, cup by cup.
See the comparisonThree cups compared on what the labels say, read the day this was written.
Three cups, side by side
Regular coffee, a mushroom coffee with 44mg of caffeine, and a caffeine-free cup with 3,000mg of mushrooms in it.
| Regular coffee | Fungki Coffee | Fungki | |
|---|---|---|---|
| Caffeine per cup | About 95mg | 44mg | None |
| Mushrooms per serving | None | 3,000mg Lion's Mane and Reishi | 3,000mg Lion's Mane, Reishi and Cordyceps |
| What is in the cup | Roasted coffee | Low-acid cold brew and decaf coffee, Siberian ginseng, Himalayan salt | Organic chicory root, mesquite, vanilla, Ceylon cinnamon |
| How you make it | A machine, a filter or a press | Two teaspoons, hot water, stir | Two teaspoons, hot water or milk, stir |
| Taste | Coffee | Coffee: smooth, bold, low acid | Rich and roasted, caramel and cinnamon, no coffee in it |
| Servings per bag | 30 | 30 | |
| Price per bag | $48.00 USD, or $36.00 on subscription | $48.00 USD, or $36.00 on subscription |
The coffee figure is the US Department of Agriculture average for an 8 oz cup. Rainbo figures are from the labels, read the day this page was written.
Why the 3pm slump follows the 8am cup
Caffeine blocks the tired signal. It does not make energy.
Caffeine does not make energy. It blocks adenosine, the signal that builds through the day and tells you that you are tired. The tiredness is still there, it just cannot get through, and when the caffeine wears off it arrives all at once. That is the wired but tired afternoon, and the 3pm cup that fixes it starts the same cycle again nearer bedtime. A standard 8 oz cup carries about 95mg. Fungki Coffee carries 44mg, less than half, from a low-acid cold brew and decaf base, so the lift is there and the spike is not. Fungki carries none at all.
What the mushrooms are doing
3,000mg in every cup, because the dose is the point
Both Rainbo cups print the number most mushroom coffees leave off the label: 3,000mg of fruiting body mushrooms in every serving. Fungki Coffee carries Lion's Mane and Reishi, with Siberian ginseng alongside them. Fungki carries Lion's Mane, Reishi and Cordyceps, 1,000mg of each, measured as dried mushroom. Lion's Mane is the one for focus and clarity. Reishi is the calm one, the reason neither cup feels like a stimulant. Cordyceps is for stamina. The research behind these mushrooms uses meaningful daily doses, which is why the number on the bag matters more than the mushroom on the front.
Which cup is yours
- You love coffee and want the lift, not the jitters. Fungki Coffee. 44mg of caffeine, a low-acid base, and it tastes like coffee because there is coffee in it.
- You are done with caffeine, or it is after noon. Fungki. No caffeine at all, the same 3,000mg of mushrooms, and a roasted taste from chicory and mesquite.
- You want the mushrooms to be a real dose. Either. Both print 3,000mg of fruiting body mushrooms per serving on the label, which is the number to compare any mushroom coffee on.
- Your stomach argues with coffee. Fungki Coffee is built on a low-acid cold brew and decaf base. Fungki has no coffee in it at all.
It gives me a gentle, steady boost without the full-throttle caffeine jitters.
Vicki P., verified review of Fungki Coffee
Fungki Coffee, the steady cup
44mg of caffeine, 3,000mg of Lion's Mane and Reishi, a low-acid cold brew base. Two teaspoons, hot water, stir. 30 cups a bag.
$36.00 USD on subscription, or $48.00 one time
Start with a bagSubscriptions save 25% and ship free, delivered every 30, 60 or 90 days, and you can cancel any time. 30 day satisfaction guarantee.
The questions people ask before they switch
Does mushroom coffee have caffeine?
It depends on the cup. Fungki Coffee has 44mg per serving, less than half of a regular 8 oz cup, from low-acid cold brew and decaf coffee. Fungki has none at all: the roasted taste comes from chicory root and mesquite, not coffee.
Does it taste like mushrooms?
No. Fungki Coffee tastes like coffee, smooth and bold, because its base is coffee. Fungki tastes rich and roasted, with caramel, vanilla and Ceylon cinnamon behind it. The mushrooms are extracts, and they dissolve into the cup without a mushroom taste.
Is mushroom coffee better than coffee?
It is different, and the difference is the caffeine. Regular coffee gives you the full dose and the full crash. Fungki Coffee gives you less than half the caffeine plus 3,000mg of mushrooms, so people describe the lift as steady rather than spiky. Which is better depends on what you want from the cup.
Which one for the afternoon slump?
If you still want caffeine, Fungki Coffee at 44mg is a gentler second cup. If you want nothing that follows you to bed, Fungki is the one: no caffeine, same 3,000mg of mushrooms, and it works iced.
What does 3,000mg actually mean?
3,000mg of fruiting body mushrooms per two teaspoon serving, measured as dried mushroom. In Fungki that is 1,000mg each of Lion's Mane, Reishi and Cordyceps. The extracts are concentrated, so the powder in the scoop weighs less than that.
How do I make it?
Two teaspoons in a mug, hot water or milk, stir. It dissolves straight in. No machine, no filter, no grinder, and both cups work iced.
What if I do not like it?
There is a 30 day satisfaction guarantee. If it is not for you, email info@rainbo.com with your order number and we will sort out a refund.
References
- Fredholm BB, Battig K, Holmen J, Nehlig A, Zvartau EE. Actions of caffeine in the brain with special reference to factors that contribute to its widespread use. Pharmacological Reviews, 1999. https://pubmed.ncbi.nlm.nih.gov/10049999/ Read 2026-09-09
- La Monica MB and colleagues. Lion's Mane, 1g single dose, double-blind placebo-controlled crossover trial in healthy adults: working memory and reaction time. Nutrients, 2023. https://pubmed.ncbi.nlm.nih.gov/38140277/ Read 2026-07-21
- Mitra and colleagues. Reishi at 500mg and 1,000mg daily for 30 days, double-blind randomized trial: physical work capacity and vitality. International Journal of Medicinal Mushrooms, 2024. https://pubmed.ncbi.nlm.nih.gov/39241163/ Read 2026-07-21
- Chen S and colleagues. Cordyceps at about 1,000mg daily for 12 weeks in healthy adults 50 to 75: exercise performance. Journal of Alternative and Complementary Medicine, 2010. https://pubmed.ncbi.nlm.nih.gov/20804368/ Read 2026-07-21
- US Department of Agriculture, FoodData Central entry 171890. Coffee prepared from grounds with tap water: 40mg caffeine per 100g. https://fdc.nal.usda.gov/food-details/171890/nutrients Read 2026-09-09
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.