Do pumpkin seeds go bad? (+7 benefits)

In this article, we will answer the question “Do pumpkin seeds go bad?”, and how to tell If the pumpkin seeds have gone bad?

Do pumpkin seeds go bad?

Yes, pumpkin seeds go bad. Pumpkin seeds are susceptible to mold growth. Due to high-fat content, they are highly prone to going rancid. Pumpkin seeds should be stored correctly to avoid their wastage due to spoilage. Read on if you want to know how to store the seeds correctly.

How to tell If the pumpkin seeds are bad?

  1. Pumpkin seeds that show visible signs of mold growth and discolorations should be discarded.
  2. If the pumpkin seeds smell rancid or sour, discord them immediately. Rancidity does not make the seeds unsafe. But the development of rancid smell destroys the quality and the nutritional value of the seeds.

How to store pumpkin seeds?

  • As long as the package of the pumpkin seeds is unopened, they can be stored in the pantry or kitchen. The rule of thumb is to store it away from the heat in a dark and cool place.
  • Once the package is opened, transfer the pumpkin seeds to a resealable bag or freezer bag if the original packaging is not resealable.
  • If the pumpkin seeds are frequently opened, it is recommended to transfer the seeds to a smaller package or bag. Because each time the seeds are exposed to air, the chances of rancidity increase.
  • If the seeds are to be stored for more than 2-3 months, they should be stored in the fridge. Always refrigerate the seeds in an air-tight container or freezer bag to protect it against moisture.
  • If you plan to store the seeds for 1 year or more, freeze them in freezer bags or air-tight containers. They should remain tightly sealed at all times.

The shelf-life of pumpkin seeds

After opening the package, the shelf-life of the pumpkin seeds is dependent on how is it stored, how often the package is opened, and what is the temperature of the storage area. The following table shows the estimated shelf-life of pumpkin seeds under different storage conditions.

In the pantryIn the fridge 
Pumpkin seeds (unopened)1-3 months past the Best-by date
Pumpkin seeds (opened)2-3 months 6-9 months
Homemade roasted pumpkin seeds 1 week1-2 months 

Health benefits of pumpkin seeds

Rich nutritional profile

In Mexico, pumpkin seeds are known as Pepita. Shell-free pumpkin seeds are green in color and have a flat and oval shape. An ounce or 28g of pumpkin seeds contain the following nutrients.

Calories 151
Fiber 1.7g
Carbs 5g
Protein 7g
Fat 13g
Vitamin K18% of the RDI
Phosphorus 33% of the RDI
Manganese 42% of the RDI
Magnesium 37% of the RDI
Iron 23% of the RDI
Zinc 14% of the RDI
Copper 19% of the RDI

Other than these nutrients, pumpkin seeds provide a good amount of anti-oxidants, poly-unsaturated fats, potassium, vitamin B2, and folate.

High in anti-oxidants 

Pumpkin seeds are a rich source of antioxidants like carotenoids and Vitamin E. anti-oxidants have anti-inflammatory properties and protect the cells against oxidative stress. They reduce the risk of heart diseases and prevent aging.

Anti-cancerous properties 

According to a study, the use of pumpkin seeds has been linked to a reduced risk of stomach, breast, lung, prostate, and colon cancers. The lignins in these seeds have been found to be helpful in preventing breast cancer.

Good for prostate and bladder health

Using pumpkin seeds has been linked to relived symptoms of Benign Prostatic Hyperplasia (BPH) and overactive bladder.

Rich source of magnesium

Unlike other plant-based foods, pumpkin seeds provide a rich amount of magnesium. Magnesium is needed to perform over 600 functions in our body. Some of which are:

  • Regulating blood pressure 
  • Reducing the risk of heart disease 
  • Maintaining bone health 
  • Controlling blood sugar levels

Good for heart health

Pumpkin seeds are a rich source of antioxidants, magnesium, zinc, and fatty acids. All of which play an important role in reducing blood cholesterol levels and reducing blood pressure. 

Both of these factors are important to maintain heart health. The ability of pumpkin seeds to increase the production of nitric oxide has healthful effects on the heart.

Other benefits

Pumpkin seeds lower blood sugar levels, improve digestive health due to high fiber content, improve sperm quality due to high zinc content, and help improve sleep. Plus the pumpkin seeds are easy to incorporate into your diet. Eat them as snacks or add to your shakes, smoothies, granola bars, greek-yogurt, bread, etc.


In this article, we answered the question “Do pumpkin seeds go bad?”, and how to tell If the pumpkin seeds have gone bad?


Sana Ameer

Hello, I'm Sana Ameer. I'm a student of Food Science and Technology at UVAS. I like to bake and I aspire to become a Food blogger.

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