Spermidine is having a moment in longevity science, and for good reason. This naturally occurring polyamine helps trigger autophagy, the process by which your cells clean out damaged components and recycle them, a mechanism closely tied to healthy aging. Research led by cardiologist Stefan Kiechl and published in outlets summarized by the National Library of Medicine found that people with higher dietary spermidine intake had lower rates of cardiovascular disease and overall mortality over long-term follow-up.
A more recent mechanistic review in Nature Aging outlines how spermidine supports mitochondrial function and cellular repair, effects that researchers believe echo some of the benefits seen with caloric restriction, without requiring you to eat less.
There’s no official RDA for spermidine, and research on it is newer than for most vitamins, but studies associating higher intake with better outcomes generally point to diets rich in fermented foods, whole grains, legumes, and aged cheeses. Here are 20 of the best food sources.
1. Wheat Germ
Wheat germ is consistently cited as one of the single richest sources of spermidine, making a spoonful stirred into oatmeal or yogurt an easy daily habit.
| Serving | Approx. Spermidine |
|---|---|
| 2 tablespoons | ~7 mg |
Best eaten: sprinkled over cereal, smoothies, or baked into bread.
2. Natto (Fermented Soybeans)
This traditional Japanese fermented soy dish is one of the most concentrated dietary sources of spermidine available, largely thanks to the fermentation process itself.
| Serving | Approx. Spermidine |
|---|---|
| 3.5 oz (100 g) | ~20 mg |
Best eaten: over rice with soy sauce and scallions, in the traditional style.
3. Dried Soybeans
Even unfermented, soybeans carry a substantial spermidine content, making them a versatile base for soups, stews, and plant-based proteins.
| Serving | Approx. Spermidine |
|---|---|
| 3.5 oz (100 g) cooked | ~7 mg |
Best eaten: simmered in soups or blended into dips.
4. Aged Cheddar Cheese
The aging process concentrates spermidine in hard cheeses, so the longer a cheese has matured, the more it tends to contain.
| Serving | Approx. Spermidine |
|---|---|
| 1 oz | ~2.3 mg |
Best eaten: in moderation, as a topping for whole grain crackers or salads.
5. Shiitake Mushrooms
Dried shiitake mushrooms pack a meaningful spermidine dose along with fiber and B vitamins.
| Serving | Approx. Spermidine |
|---|---|
| 1 oz dried | ~2.5 mg |
Best eaten: rehydrated and sautéed into stir-fries or broths.
6. Chicken Liver
Organ meats are an underrated spermidine source, with chicken liver offering a notable amount alongside iron and vitamin A.
| Serving | Approx. Spermidine |
|---|---|
| 3.5 oz (100 g) | ~2 mg |
Best eaten: pan-seared with onions, once or twice a week.
7. Green Peas
Fresh or frozen green peas are one of the more accessible everyday vegetable sources of spermidine.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup cooked | ~5 mg |
Best eaten: steamed as a side or stirred into grain bowls.
8. Broccoli
Along with its many other benefits, broccoli contributes a modest but reliable amount of spermidine to a regular vegetable rotation.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup cooked | ~2 mg |
Best eaten: roasted or steamed, ideally still slightly crisp.
9. Cauliflower
Like its cruciferous cousin broccoli, cauliflower offers a smaller but steady spermidine contribution.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup cooked | ~1.3 mg |
Best eaten: roasted whole or riced as a grain substitute.
10. Whole Grain Bread
Because wheat germ and bran carry much of the spermidine in wheat, whole grain bread retains meaningfully more than refined white bread.
| Serving | Approx. Spermidine |
|---|---|
| 2 slices | ~2 mg |
Best eaten: toasted with a spread of aged cheese or nut butter.
11. Edamame
Young soybeans still in the pod carry a solid spermidine content and make an easy snack straight from the freezer aisle.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup steamed | ~3 mg |
Best eaten: steamed and lightly salted as a snack.
12. Lentils
Lentils bring spermidine along with fiber and plant protein, making them one of the most well-rounded legumes on this list.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup cooked | ~2 mg |
Best eaten: simmered into soups, dals, or grain bowls.
13. Mango
Mango is one of the few fruits with a notable spermidine content, adding a sweet, easy option to the list.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup sliced | ~1 mg |
Best eaten: fresh, sliced over yogurt or blended into smoothies.
14. Grapefruit
Grapefruit contributes a small amount of spermidine along with a strong dose of vitamin C, though it can interact with certain medications, so check with your doctor if you take prescriptions affected by citrus.
| Serving | Approx. Spermidine |
|---|---|
| 1 medium fruit | ~1 mg |
Best eaten: halved for breakfast or segmented into salads.
15. Pears
Pears offer a mild spermidine contribution and are easy to eat daily without much preparation.
| Serving | Approx. Spermidine |
|---|---|
| 1 medium pear | ~0.5 mg |
Best eaten: fresh, with the skin on for extra fiber.
16. Kimchi
Like natto, kimchi’s fermentation process boosts its spermidine content well beyond that of raw cabbage.
| Serving | Approx. Spermidine |
|---|---|
| 1/2 cup | ~2 mg |
Best eaten: as a side dish or mixed into rice and noodle bowls.
17. Blue Cheese
Like other aged cheeses, blue cheese’s mold-ripening process helps concentrate spermidine over time.
| Serving | Approx. Spermidine |
|---|---|
| 1 oz | ~1.8 mg |
Best eaten: crumbled over salads or paired with pears.
18. Durian
This famously pungent fruit is one of the highest natural fruit sources of spermidine, though it can be hard to find outside specialty markets.
| Serving | Approx. Spermidine |
|---|---|
| 3.5 oz (100 g) | ~3 mg |
Best eaten: fresh, as a stand-alone treat.
19. Brown Rice
Brown rice keeps its bran and germ intact, giving it a spermidine edge over white rice.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup cooked | ~1 mg |
Best eaten: as a base for grain bowls and stir-fries.
20. Corn
Corn rounds out the list with a modest but useful spermidine contribution, especially when eaten with the germ intact.
| Serving | Approx. Spermidine |
|---|---|
| 1 cup kernels | ~0.7 mg |
Best eaten: grilled on the cob or added to salads.
5 Evidence-Based Tips for Getting the Most From These Foods
- Lean into fermentation. Fermented foods like natto and kimchi consistently show higher spermidine levels than their raw counterparts, since the fermentation process itself generates more of the compound.
- Don’t skip the bran and germ. Choosing whole grains over refined versions preserves the parts of the plant where spermidine concentrates most.
- Aged cheese counts, in moderation. The longer a cheese ages, the more spermidine it tends to contain, but pair it with the rest of a balanced diet given its saturated fat content.
- Combine plant and fermented sources. Legumes, whole grains, and fermented soy products together build a more consistent daily intake than relying on any single food.
- Think long-term. The research linking spermidine to longevity comes from long-term dietary patterns, not single meals, so consistency matters more than any one spermidine-rich dish.
The Bottom Line
Spermidine research is still evolving, but the foods that supply it, fermented soy, whole grains, legumes, and aged cheese, are already staples of some of the world’s longest-lived populations. Working a few of these into your weekly rotation is a low-risk way to align your plate with what the longevity science currently suggests.
Nutrient values are approximate and drawn from published spermidine food-content research, which can vary based on ripeness, aging time, and preparation method.
This article is for informational purposes only and is not a substitute for professional medical advice. Talk to a registered dietitian or physician before making significant dietary changes, especially if you take medications affected by fermented or high-tyramine foods.
