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Adaptogenic mushroom supplement; very low calorie, commonly used for polysaccharides and triterpene compounds.
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 teaspoon (small) of Reishi mushroom supplement (3 g) has 8 calories. That works out to 250 calories per 100 g. It contains 2.1 g of carbs, 0.3 g of protein, 0.1 g of fat and 1.3 g of fiber. Its glycemic index is 15 (low), so it raises blood sugar slowly.
Selected: 1 teaspoon (small) · 3 g
8
KCAL / 3G
Carbs
2.1g
· 1% DV
Protein
0.3g
· 1% DV
Fat
0.1g
· 0% DV
Fiber
1.3g
· 5% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 80% · Protein 11% · Fat 9%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 8 kcal | |
| Total fat | 0.1 g | 0% |
| Saturated fat | 0.01 g | 0% |
| Trans fat | 0 g | |
| Sodium | 0.45 mg | 0% |
| Total carbohydrate | 2.1 g | 1% |
| Fiber | 1.3 g | 5% |
| Protein | 0.3 g | 1% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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| Serving | Amount | Calories |
|---|---|---|
| 1 teaspoon (small) | 3 g | 8 kcal |
| 1 serving (extra small) | 1 g | 3 kcal |
| 1 teaspoon (mini) | 2 g | 5 kcal |
| 1 serving (small) | 2 g | 5 kcal |
| 1 serving (medium) | 3 g | 8 kcal |
| 1 tablespoon (medium) | 6 g | 15 kcal |
| 1 tablespoon (large) | 9 g | 23 kcal |
| 1 pack (small) | 10 g | 25 kcal |
| 100 g | 100 g | 250 kcal |
Calculated from 250 calories per 100 g.
A reishi mushroom supplement is commonly taken for its proposed immune and general wellness benefits, but strong clinical evidence for these effects is limited. It has not been shown to treat infections, cancer, or other diseases.
There is not enough reliable evidence that a reishi mushroom supplement improves sleep. Some users describe feeling relaxed, but reishi is not an established sleep aid and should not replace evaluation of persistent sleep problems.
A reishi mushroom supplement may cause stomach upset, dry mouth, or dizziness. Rare cases of liver injury have been reported; stop taking it and seek urgent medical care for symptoms such as yellow skin or eyes, dark urine, or severe abdominal pain.
There is no established best time to take a reishi mushroom supplement. Follow the product directions and choose a time you can stick to; taking it with food may be more comfortable if it upsets your stomach.
No. Reishi mushroom powder is usually ground mushroom, while an extract is made to concentrate selected compounds. Extracts may be standardized for polysaccharides or triterpenes, so compare the product’s stated ingredients rather than assuming equal amounts are interchangeable.
A reishi mushroom supplement has not been proven to “boost” immunity in a way that prevents illness. Laboratory and early research on its compounds do not establish that taking the supplement protects people from infections or replaces vaccination.
Some products are intended for daily use, but long-term safety has not been established for every reishi mushroom supplement. Follow the label, avoid exceeding its directions, and remember that evidence from short studies cannot confirm safety over extended use.
Yes, a reishi mushroom supplement may affect bleeding risk and interact with blood thinners, blood pressure or blood sugar medicines, and immune-suppressing drugs. Ask your doctor or pharmacist before using it with any of these medicines.
Yes, powdered reishi mushroom supplement can be stirred into hot water, although its flavor is often quite bitter. Capsules are not tea ingredients, and a supplement powder is not necessarily equivalent to a traditionally prepared reishi mushroom tea.
Reishi mushroom supplements have not been shown to be safe during pregnancy, so it is prudent to avoid them. Pregnancy safety data are limited, and supplement products can vary in their extracts and other ingredients.
Vitamins
B2
0.04mg · 3% DV
B5
0.06mg · 1% DV
B3
0.18mg · 1% DV
B1
0.01mg · 1% DV
Minerals
Copper
0.02mg · 2% DV
Manganese
0.04mg · 2% DV
Potassium ⭐
45mg · 1% DV
Phosphorus
7.5mg · 1% DV
Sodium
0.45mg · 0% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 8 calories in 1 teaspoon (small) (3 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Reishi mushroom supplement is made from the dried mushroom or an extract of reishi, a woody fungus long used in East Asian traditions. It is sold as powder, capsules or liquid preparations. The mushroom has a firm, woody texture, while supplements tend to taste earthy and quite bitter.
Powder can be stirred into tea, coffee or soup, though its strong flavour is not to everyone’s liking. A typical serving is about one small teaspoon, so it adds little energy in that amount. Its nutritional character is less about everyday nourishment and more about compounds such as polysaccharides and triterpenes. Follow the serving directions on the product label; mixing the powder into a strongly flavoured drink or soup can make it easier to take.
Low
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
High
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
NOVA 3
Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
No known major allergens
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
SATURATED
0.01g
MONOUNSATURATED
0.01g
POLYUNSATURATED
0.01g
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Nutrition data compiled from USDA FoodData Central and scientific sources.