A Surprising Source of a Vital Nutrient
While leafy greens like kale and spinach are the most famous sources of vitamin K, some types of nuts can also provide a small, yet meaningful, boost to your intake. Vitamin K is a group of fat-soluble vitamins essential for blood clotting and healthy bones. Since nuts are a great source of healthy fats, they can also aid in the proper absorption of this vital nutrient. However, not all nuts are created equal when it comes to vitamin K content.
The Nuts with the Most Vitamin K
When examining the vitamin K content in nuts, a few stand out from the crowd. Their contributions are still modest compared to leafy greens but can be a useful part of a varied diet.
Pine Nuts Dried pine nuts lead the pack as the nut with the highest amount of vitamin K. A single ounce (28g) serving provides approximately 15 mcg of vitamin K, which is a decent portion of the recommended daily intake.
Cashews These creamy nuts are another solid source of vitamin K. An ounce of raw cashews contains about 9.7 mcg of vitamin K. Cashews are also praised for their role in supporting bone health due to their rich profile of other minerals like magnesium and manganese.
Pistachios and Hazelnuts Pistachios have also been noted for containing vitamin K, alongside other beneficial nutrients. Hazelnuts contain a smaller amount, providing about 4 mcg of vitamin K per ounce. Adding these nuts to your diet offers a variety of nutrients and textures, along with a bit of vitamin K.
Nuts with Negligible Vitamin K
For many popular nuts, the vitamin K content is extremely low or undetectable. While these nuts offer a wealth of other health benefits, they are not reliable sources for this particular vitamin.
- Almonds: Despite being a nutritional powerhouse for other vitamins and minerals, almonds contain virtually no vitamin K, with some analyses showing 0 mcg per serving.
- Walnuts and Pecans: Similar to almonds, both walnuts and pecans contain very low or trace amounts of vitamin K.
- Macadamia Nuts and Brazil Nuts: These are also not considered a source of vitamin K, with studies confirming minimal or non-existent levels.
Nuts vs. Greens: A Vitamin K Comparison
The following table illustrates the vast difference in vitamin K content between nuts and other common food sources. Values are per 100 grams unless otherwise noted.
| Food Source | Vitamin K (mcg) per 100g | Notes | 
|---|---|---|
| Kale, raw | ~483 mcg | Excellent source, significantly higher than nuts. | 
| Spinach, raw | ~145 mcg | Another top leafy green source. | 
| Pine nuts, dried | ~54 mcg | Top nut source. | 
| Cashews, raw | ~34 mcg | Second best nut source. | 
| Hazelnuts | ~14 mcg | Moderate nut source. | 
| Pistachios, dry roasted | ~13 mcg | Moderate nut source. | 
| Pecans | ~3.5 mcg | Low nut source. | 
| Walnuts | ~2.7 mcg | Low nut source. | 
| Almonds | 0 mcg | Negligible source. | 
How to Increase Vitamin K from Nuts
For those looking to boost their vitamin K intake from nuts, incorporating the right types into your daily meals is key. Here are a few simple strategies:
- Add pine nuts to salads: Sprinkle dried pine nuts over a spinach salad for a double dose of vitamin K.
- Snack on cashews: Grab a handful of raw cashews for a midday snack that provides both healthy fats and a boost of vitamin K.
- Use nut butters wisely: Some nut butters may contain trace amounts, but for the best results, stick to whole pine nuts and cashews.
For a more comprehensive look at vitamin K and its functions in the body, you can refer to authoritative sources such as the National Institutes of Health Fact Sheet.
Conclusion
While some nuts, most notably pine nuts and cashews, do contain vitamin K, they are not the most potent dietary source. Leafy green vegetables overwhelmingly provide higher quantities of this fat-soluble vitamin. However, including these specific nuts in your diet is a flavorful and nutritious way to get a little extra vitamin K alongside other important minerals and healthy fats. For a substantial intake, it's best to rely on a varied diet that includes plenty of leafy greens and to see nuts as a complementary source rather than the primary one.