on September 28, 2026
Quick answer: Mushrooms are among the best-established dietary sources of ergothioneine. Food analyses have also detected it in black and red beans, oat bran, liver and kidney. The amount varies with the food and how it is measured. Comparing a meal with a supplement requires matching the units, the serving size and the actual ergothioneine content.
A food list can help you plan meals. A supplement label can help you identify a declared ingredient amount. Understanding how those numbers are obtained makes both easier to use.
Key Takeaways
- Mushrooms are a practical starting point for exploring ergothioneine foods.
- Species, sample characteristics and fresh-versus-dry reporting affect food comparisons.
- Ergothioneine has no established U.S. Daily Value.
- Human study doses describe specific research protocols; individual supplement decisions require additional context.
- The weight of a mushroom powder or extract and its ergothioneine content are separate quantities.
Which Foods Contain Ergothioneine?
Ergothioneine is a sulfur-containing compound found in certain foods and studied for its role in redox biology. In a food-composition study using liquid chromatography and mass spectrometry, researchers identified sources including specialty mushrooms, black and red beans, oat bran, liver and kidney.
| Food | What the evidence supports | Practical use |
|---|---|---|
| Culinary mushrooms | Measured sources with substantial differences between species and samples. | Add store-bought edible mushrooms to soups, eggs, grain dishes or stir-fries. |
| Black and red beans | Ergothioneine was detected in analyzed samples. | Use properly cooked beans in meals; interpret any milligram estimate in its preparation context. |
| Oat bran | A measured source in food-composition research. | Use as a familiar breakfast ingredient according to package directions. |
| Liver and kidney | Ergothioneine has been measured in these foods. | Consider them within your existing dietary needs and preferences; food choices involve their full nutrient profile. |
Which mushrooms should you choose?
Availability, taste and meal preparation are useful starting points. In research comparing 13 mushroom species, porcini had the highest concentrations of the two antioxidants studied, ergothioneine and glutathione. Common white button mushrooms also contained both compounds. Penn State's report of the research describes these differences.
That finding ranks the samples in a particular study. It leaves room for variation in mushrooms sold elsewhere. Choose edible mushrooms from reliable food suppliers and prepare them using appropriate food-safety guidance.
How to Read Ergothioneine Food Measurements
Before comparing two numbers, check the denominator. A value expressed per gram of dried mushroom describes a different material from the same weight of fresh mushroom.
Kalaras and colleagues reported ergothioneine concentrations ranging from 0.15 to 7.27 mg per gram of dry weight across the mushroom samples studied. These values describe dried material; estimating an ordinary fresh serving requires additional information about moisture and portion weight.
| Reported amount | What it measures | What a comparison needs |
|---|---|---|
| mg/g dry weight | Ergothioneine per gram of dry material. | Moisture data before conversion to a fresh-food amount. |
| mg/100 g fresh weight | Ergothioneine in 100 grams of the fresh sample. | A matching food, preparation and portion weight. |
| mg per supplement serving | The declared ingredient amount in a specified serving. | The serving size, exact ingredient and complete formula. |
For a useful food comparison, match the species, edible portion, fresh or dried state, preparation and units. A mushroom's total weight alone provides insufficient information to calculate its ergothioneine content.
A Practical Food-First Routine
Build meals around foods you enjoy and tolerate. Cooked mushrooms can fit into an omelet, a bean dish or a grain bowl. Oat bran can fit into breakfast. These are ways to include measured food sources within a varied diet, with portions guided by your broader nutritional needs.
Keep food tracking realistic. An online concentration table may represent a different variety or preparation from the food on your plate. Everyday meals rarely come with batch-specific ergothioneine measurements.
The same label-reading habit is useful when exploring other dietary compounds. Our spermidine food sources guide provides a related perspective on building food variety.
Ergothioneine Dosage: What Human Studies Tell Us
The FDA's Daily Value reference provides established nutrient benchmarks. Ergothioneine has no established U.S. Daily Value, so a supplement amount cannot be translated into a percentage of a recognized daily requirement.
Research offers examples of amounts used under defined conditions. Two studies illustrate why the preparation, participants and research question matter.
| Study | Preparation and regimen | Interpretation |
|---|---|---|
| Cheah et al., 2017 | Purified ergothioneine, 5 mg or 25 mg daily for seven days, compared with placebo in 45 healthy men. | Blood concentrations increased. Most changes in oxidative-damage and inflammation biomarkers were statistically nonsignificant. |
| Hanayama et al., 2024 | Hiratake mushroom tablets providing 25 mg daily for 12 weeks, compared with placebo in 80 healthy women. | The trial assessed skin outcomes using a mushroom preparation. Its findings apply to that preparation and study population. |
The first example mainly informs uptake and short-term biomarker interpretation. The second evaluates an ergothioneine-containing food preparation. Neither study establishes a universal daily intake target or demonstrates that progressively higher amounts produce better outcomes.
What to Check on an Ergothioneine Supplement Label
- The named ingredient. Look for an explicit ergothioneine declaration. A mushroom powder or extract can contain many constituents.
- The amount per serving. Check how many units make up one serving and distinguish that amount from the total in the container.
- The actual ergothioneine content. A 500 mg mushroom extract declaration describes extract weight. Its ergothioneine content requires a separate quantitative declaration or reliable assay.
- The complete formula. Review other active ingredients, allergens, directions and warnings.
- The supporting evidence. Match any cited study to the ingredient, preparation, dose, population and outcome relevant to your decision.
For a broader overview of the ingredient, see our guide to ergothioneine research and supplement evaluation.
Where NyxSeren Luna Fits
NyxSeren's product specification lists Ergothioneine: 50 mg per serving in Luna Nightly Repair & Renewal. This is a declared formulation amount, distinct from a dietary requirement or an individualized recommendation.
The amount is higher than those used in the two study examples above. Those studies involved different preparations, so their findings have limited applicability to Luna's complete multi-ingredient formula.
Luna occupies the evening side of NyxSeren's day-and-night routine. The studies discussed here provide no direct morning-versus-evening comparison for ergothioneine. Review the complete formula and directions on the Luna Nightly Repair & Renewal product page when considering whether it fits your routine.
Safety and Individual Suitability
The FDA advises discussing supplement use with a healthcare professional. Seek individual guidance if you are pregnant, breastfeeding, managing a medical condition or taking medicines.
For multi-ingredient evening formulas, ask a clinician or pharmacist to review antidepressants, other serotonergic medicines, sedatives, sleep aids and any overlapping supplements before combining them. Follow the current product label and keep your healthcare professional informed about the full routine.
Making an Informed Choice
Start with a varied diet, compare food data using matching units, and read supplement labels at the ingredient and serving level. These steps help turn an ergothioneine search into a practical, evidence-aware decision.
Frequently Asked Questions
What foods contain ergothioneine?
Measured food sources include culinary mushrooms, black and red beans, oat bran, liver and kidney. Amounts vary with the food, sample and reporting method. Mushrooms are among the best-established dietary sources.
Can dry-weight and fresh-weight mushroom values be compared directly?
A dry-weight value refers to material after moisture removal. A fresh-weight value includes the water in the food. A valid conversion requires moisture information and a clearly defined portion.
How much ergothioneine should I take daily?
Ergothioneine has no established U.S. Daily Value. Human studies use different preparations and regimens. A study dose or product serving amount needs to be interpreted in that context, with individualized guidance from a healthcare professional.
Is mushroom extract weight the same as ergothioneine content?
Mushroom extract weight describes the total extract. Its ergothioneine content requires a separate quantitative declaration or reliable assay. Review both the named ingredient and the amount per serving.
How do ergothioneine foods and supplements fit into a diet?
Whole foods contribute multiple nutrients and dietary variety. Supplements provide declared amounts of selected ingredients. Their suitability depends on the complete formula, your existing diet, medicines and individual needs.