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A cluster of raw oyster mushrooms with overlapping ivory-to-pale-gray fan-shaped caps, softly rippled edges, and fine white gills running down their short, joined stems.
●Low GI
★Natural
⚡High Potassium

Oyster Mushroom (Raw) Calories

Low calorie, fiber source, B vitamins, mineral rich

In season: Spring · Summer · Autumn

CALORIES · 100 G

33kcal

GI

15low

POTASSIUM · 100 G

420mg

FIBER · 100 G

2.3g

Quick answer

1 cup (medium) of Oyster Mushroom (Raw) (85 g) has 28 calories. That works out to 33 calories per 100 g. It contains 5.2 g of carbs, 2.8 g of protein, 0.3 g of fat and 2 g of fiber. Its 14.5 µg of Biotin covers 48% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.

Oyster Mushroom (Raw) Nutrition Facts

Selected: 1 cup (medium) · 85 g

28

KCAL / 85G

Carbs

5.2g

· 2% DV

Protein

2.8g

· 6% DV

Fat

0.3g

· 0% DV

Fiber

2g

· 7% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 60% · Protein 32% · Fat 8%

Oyster Mushroom (Raw) nutrition facts table · 1 cup (medium) (85 g)

NutrientAmount% DV
Calories28 kcal
Total fat0.3 g0%
Saturated fat0.06 g0%
Trans fat0 g
Sodium15 mg1%
Total carbohydrate5.2 g2%
Fiber2 g7%
Protein2.8 g6%

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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How Many Calories in 1 Cup of Oyster Mushroom (Raw)?

ServingAmountCalories
1 cup (medium)85 g28 kcal
1 piece (small)15 g5 kcal
1 piece (medium)30 g10 kcal
1 piece (large)50 g17 kcal
1 cup (small)50 g17 kcal
3 piece (medium)90 g30 kcal
100 g100 g33 kcal
1 serving (large)120 g40 kcal
1 cup (large)120 g40 kcal

Calculated from 33 calories per 100 g.

Frequently Asked Questions About Oyster Mushroom (Raw)

Can you eat raw oyster mushrooms?

Yes, fresh oyster mushrooms can be eaten raw, but their firm texture may be difficult for some people to digest. Cooking softens them and is usually the more enjoyable option, especially for a first taste.

How do you clean oyster mushrooms?

Wipe oyster mushrooms with a damp cloth or rinse them briefly under cool running water. Avoid soaking them, since they absorb moisture; pat them dry before cooking so they brown rather than steam.

How should you store oyster mushrooms in the refrigerator?

Keep oyster mushrooms unwashed in a breathable paper bag in the refrigerator. A sealed plastic container can trap moisture and speed up spoilage; check for a slimy surface, mold, or an unpleasant sour smell before using.

Can you freeze oyster mushrooms raw?

You can freeze oyster mushrooms, but freezing them raw often leaves them softer and less pleasant after thawing. Sauté them first, let them cool, and freeze in an airtight container; use them later in soups, sauces, or other cooked dishes.

Are oyster mushroom stems edible?

Yes, oyster mushroom stems are edible. The stems of larger mushrooms can be tougher than the caps, so trim any woody base and slice the rest thinly for stir-fries, soups, or stock.

What is the best way to cook oyster mushrooms?

Sauté oyster mushrooms in a hot pan with a little oil until their released moisture has evaporated and the edges begin to brown. Cook in batches rather than crowding the pan to avoid a watery, steamed texture.

Why are my oyster mushrooms rubbery?

Oyster mushrooms can turn rubbery when they are undercooked or crowded in a pan, where they steam instead of browning. Give them room in a hot pan and cook until their moisture has evaporated and the texture softens.

What do oyster mushrooms taste like?

Oyster mushrooms have a mild, savory flavor and a tender, slightly chewy texture when cooked. Browning brings out a deeper, meatier taste, and they pair well with garlic, herbs, and soy sauce.

Can you use raw oyster mushrooms in a salad?

Yes, thinly sliced fresh oyster mushrooms can be added to a salad, but their raw texture is quite firm. A quick sauté followed by cooling gives a softer topping if you prefer not to eat them raw.

How can you tell if oyster mushrooms have gone bad?

Discard oyster mushrooms that have developed mold, a slimy coating, or a strong sour or unpleasant odor. Fresh ones should look reasonably firm and dry; slight drying is different from spoilage, but a wet, deteriorating texture is a warning sign.

Oyster Mushroom (Raw) Vitamins & Minerals

Vitamins

Biotin

14.45µg · 48% DV

B5

1.11mg · 22% DV

B3

3.4mg · 21% DV

B2

0.24mg · 18% DV

Minerals

Copper

0.17mg · 19% DV

Phosphorus

102mg · 15% DV

Potassium ⭐

357mg · 11% DV

Zinc

0.94mg · 9% DV

Sodium

15mg · 1% DV

Oyster Mushroom (Raw) Glycemic Index

GLYCEMIC INDEX

15
Low
0 Low5570100

GLYCEMIC LOAD

0.9
Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Oyster Mushroom (Raw)

To burn the 28 calories in 1 cup (medium) (85 g):

🚶

7min

Walking (5 km/h)

🏃

3min

Running (8 km/h)

🚴

4min

Cycling

🏊

3min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

What is Oyster Mushroom (Raw)?

Oyster mushrooms grow in overlapping, fan-shaped clusters on wood and are cultivated around the world. Raw oyster mushrooms can be sliced into salads, though they are more commonly cooked, when their texture softens and their savoury flavour becomes more pronounced.

Fresh and raw, they are mildly earthy and pleasantly chewy. Try them thinly sliced with crisp greens, or sauté them for a quick side, topping or addition to soups and grain bowls. They are low in calories and provide fibre and B vitamins; a 100 g portion has 2.3 g of fibre. For a lighter preparation, cook them with a little oil and finish with lemon, herbs or garlic.

How Nutritious Is Oyster Mushroom (Raw)?

Nutrient density

High

70/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

53/ 100

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.

Is Oyster Mushroom (Raw) Processed?

NOVA 1

Unprocessed

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.

Does Oyster Mushroom (Raw) Contain Allergens?

No known major allergens

Gluten free
Dairy free
Eggs free
Peanuts free
Tree nuts free
Fish free
Soy free
Sesame free

Which Diets Is Oyster Mushroom (Raw) Good For?

Vegan

✓ Suitable

Vegetarian

✓ Suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

— Not suitable

Low FODMAP

— Not suitable

Oyster Mushroom (Raw) Fat Profile

SATURATED

0.06g

MONOUNSATURATED

0.05g

POLYUNSATURATED

0.11g

⚖️

Omega 6:3 ratio 8:1

Above the ideal 4:1 (8:1).

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Nutrition data compiled from USDA FoodData Central and scientific sources.