Top Natural Sources of NMN You Can Easily Add to Your Diet

A natural approach to NMN and NAD+

If you are curious about NMN supplements, it helps to first understand the natural sources of NMN that already appear on your plate. Nicotinamide mononucleotide (NMN) is a vitamin B3–related molecule your body uses to make NAD+ (nicotinamide adenine dinucleotide), a coenzyme that supports cellular energy production, DNA repair, and healthy aging (Jinfiniti, Purovitalis).

Your NAD+ levels naturally decline with age, which is one reason NMN has become popular in the longevity world. While food alone will not give you the high NMN doses used in research, you can still support your baseline NAD+ levels by eating NMN rich foods on a regular basis (Decode Age).

What NMN does in your body

NMN is the immediate building block your cells use to create NAD+. You can think of NMN as the key raw material in the NAD+ factory. When you eat foods that contain NMN or related vitamin B3 compounds, your body converts them into NAD+ to:

Help your mitochondria turn food into usable energy
Support DNA repair and protect cells from everyday damage
Regulate the activity of longevity related enzymes such as sirtuins

Because NAD+ levels drop significantly as you age, your cells have less support for energy metabolism and repair. That is why there is so much interest in strategies that maintain or restore NAD+, including NMN rich foods and, for some people, NMN supplements (Jinfiniti).

Why natural sources of NMN still matter

The NMN content in foods is modest, usually less than a couple of milligrams per 100 grams. For example, a 2016 study cited by Decode Age reported that cabbage and cucumber contain about 0.25 to 1.88 mg of NMN per 100 grams, while tomatoes and avocados offer roughly 0.26 to 1.60 mg per 100 grams (Decode Age).

Compare that to typical supplement doses of 250 to 1200 mg per day in human research and you can see the gap (Jinfiniti). Purovitalis estimates that you would need around 100 kilograms of broccoli or 69 kilograms of avocado in one day to reach 250 mg of NMN from food alone, which simply is not realistic (Purovitalis).

Even so, natural sources of NMN still play an important role because they:

Help you maintain baseline NAD+ over time
Deliver NMN together with fiber, antioxidants, and polyphenols
Support metabolic and cardiovascular health in broader ways
Provide a foundation if you later decide to add a supplement

Think of NMN rich foods as the daily maintenance plan and supplements, if you choose to use them, as an extra boost layered on top.

Top natural food sources of NMN

A variety of vegetables, fruits, legumes, and animal foods provide NMN and related vitamin B3 compounds. Below you will find the most widely discussed natural sources of NMN and practical ways to include them in your routine.

Edamame and other soy foods

Across several analyses, edamame, or young soybeans, stand out as one of the highest natural sources of NMN per 100 gram serving (Jinfiniti, Decode Age). Edamame gives you:

Protein and fiber
NMN and other NAD+ precursors
Minerals like magnesium and potassium

You can add steamed edamame to grain bowls, stir fries, or enjoy it on its own with a pinch of sea salt. Fermented soy products such as tempeh and miso may also contribute, although specific NMN values are less well defined.

Cruciferous vegetables: Broccoli and cabbage

Broccoli and cabbage are two of the best studied vegetable sources of NMN. Different studies and brands report slightly different ranges, but overall you will find about 0.25 to 1.12 mg of NMN per 100 grams of broccoli and up to about 0.90 mg per 100 grams of cabbage (Purovitalis, Decode Age).

Broccoli stems, which people often throw away, appear to be especially rich in NMN and related compounds (Jinfiniti). You can slice them thinly for stir fries or shave them into a slaw with cabbage, carrots, and a light dressing.

Mushrooms, especially shiitake

Shiitake mushrooms are frequently singled out as one of the richest natural sources of NMN alongside broccoli, cabbage, and edamame (Decode Age). Other mushrooms likely contribute smaller but still useful amounts.

You can:

Add sliced shiitake to soups and broths
Sauté them with garlic as a side dish
Mix them into omelets or frittatas

Besides NMN, mushrooms provide beta glucans and antioxidants that support immune function and overall cellular health.

Hydrating vegetables: Cucumbers and tomatoes

If you like simple salads, you are already getting some NMN. Cucumbers and tomatoes both contain around 0.25 to 1.60 mg of NMN per 100 grams, depending on the specific variety and growing conditions (Decode Age).

Cucumbers are usually eaten raw, which is ideal because NMN degrades with heat and long storage. Tomatoes work well both raw and lightly cooked. A quick sauté is preferable to prolonged high heat if you want to preserve delicate compounds.

Healthy fats: Avocado

Avocado offers a combination of NMN, vitamin B3 related compounds, and heart friendly monounsaturated fats. Studies cited by Decode Age and Purovitalis place avocado in the same approximate NMN range as tomatoes, up to about 1.60 mg per 100 grams (Decode Age, Purovitalis).

You can slice avocado over salads, mash it on whole grain toast, or blend it into smoothies for a creamy texture that also supports NAD+ production.

Other plant based sources

You will also find natural sources of NMN in:

Potatoes and oranges, which supply modest NMN levels plus vitamin C and fiber (Decode Age)
Legumes beyond soy, such as some beans and peas, which provide vitamin B3 and NAD+ precursors
True or Ceylon cinnamon (Cinnamomum verum), where the bark and leaves naturally contain measurable NMN and very low levels of coumarin, a compound you want to limit (PMC Molecules)

These foods are not usually eaten in huge quantities, but they can still contribute to your daily baseline.

Animal based NMN sources

If you eat animal products, you can also get NMN from foods like beef and shrimp. Purovitalis reports that raw beef contains about 0.06 to 0.42 mg NMN per 100 grams, while shrimp provides smaller but still detectable levels (Purovitalis).

Fish and seafood that also contain vitamin B3 and related compounds support the same NAD+ pathways (Jinfiniti). Even though their NMN content is modest, including them as part of a balanced diet can help maintain cellular energy and metabolic health.

Quick recap: Edamame, shiitake mushrooms, broccoli, cabbage, avocado, cucumber, and tomatoes sit at the top of most lists of natural sources of NMN. If you build your meals around these foods, you will steadily support your NAD+ levels in a food first way.

How cooking and storage affect NMN in foods

NMN is sensitive to heat, oxidation, and prolonged storage. That means how you store and cook NMN rich foods can significantly affect their contribution to your diet.

Purovitalis notes that NMN begins to degrade at temperatures above about 95 degrees Fahrenheit, and that gentle cooking methods are best for preserving what is there (Purovitalis). Jinfiniti echoes this, recommending minimal processing and quick steaming rather than high heat roasting or frying (Jinfiniti).

To get the most NMN from food, you can:

Eat some NMN rich vegetables raw, such as cucumbers, tomatoes, and avocado
Lightly steam broccoli or cabbage for 1 to 2 minutes instead of boiling them for a long time
Store produce in the refrigerator and use it within a few days of purchase
Cut vegetables closer to when you plan to eat them to limit oxidation

Interestingly, in the case of Ceylon cinnamon bark, a brief heat treatment around 100 degrees Celsius for a few minutes appears to stabilize NMN by inactivating enzymes that would otherwise break it down during storage (PMC Molecules). In whole foods, though, your safest bet is gentle and minimal cooking.

Why food alone is not enough for high NMN doses

If you are considering NMN supplements for targeted anti aging benefits, you should know where food fits in. Several sources point out that natural sources of NMN simply do not reach the levels used in research trials. Jinfiniti notes that the trace amounts found in foods are much lower than the 250 to 1200 mg per day studied in humans, especially as your ability to convert nutrients into NAD+ becomes less efficient with age (Jinfiniti).

Decode Age and Purovitalis both highlight the same conclusion. While food is important for baseline NAD+ and general health, supplementation is usually needed if you want to approach the higher NMN intakes seen in clinical studies (Decode Age, Purovitalis).

That does not mean you have to take supplements, only that you should set realistic expectations. NMN rich foods are a long term strategy for cellular resilience, not a quick way to hit pharmacological doses.

How NMN in supplements is made

If you end up exploring NMN supplements, it helps to know where the NMN actually comes from. As of 2023, manufacturers typically produce NMN using one of three approaches (nmn.com):

Bacterial fermentation, often with genetically engineered E. coli, which turn simple ingredients like glucose and nicotinamide into NMN in a controlled bioreactor.
Enzymatic conversion, which uses natural enzymes such as nicotinamide riboside kinase from the fungus Kluyveromyces marxianus to convert nicotinamide riboside (NR) into NMN. This can reach very high yields in a short time.
Chemical synthesis, which does not necessarily rely on living organisms and may result in NMN that is structurally identical but not directly derived from a natural source.

The industry still has limited transparency about which method individual brands use, and labeling may not clearly indicate whether NMN is produced by fermentation, enzymatic processes, or chemical synthesis (nmn.com). If this is important to you, it is worth reaching out to companies and asking about their production methods and quality control.

Simple ways to add more NMN rich foods

You do not need a complete diet overhaul to benefit from natural sources of NMN. Small, consistent changes go a long way. Here are a few easy ideas you can try this week:

Swap one snack for a bowl of lightly salted edamame
Add a side of steamed broccoli or cabbage to your usual dinner
Build a salad with cucumber, tomato, avocado, and a sprinkle of Ceylon cinnamon in the dressing
Toss shiitake mushrooms into your next stir fry or soup
Keep oranges and other fresh fruit handy for a quick dessert

By making these foods regular staples, you support your NAD+ levels, increase your intake of fiber and antioxidants, and give yourself a solid nutritional base whether or not you choose to use NMN supplements.

If you decide to explore supplements, you can view them as one more tool layered on top of a diet that already works in your favor, rather than a shortcut that replaces good daily habits.