Beets pack a surprisingly dense nutritional profile for a root vegetable. They’re rich in folate, manganese, and potassium, while also delivering a class of plant pigments and naturally occurring nitrates that you won’t find in most other foods. Here’s what’s actually inside a beet and why it matters.
Vitamins and Minerals in Beets
One cup of raw beets (about 136 grams) contains roughly 148 micrograms of folate, which covers over a third of the daily recommended intake for most adults. Folate is essential for DNA synthesis and red blood cell production, making beets one of the better vegetable sources of this B vitamin. This is especially relevant during pregnancy, when folate needs increase significantly.
That same serving also provides about 0.45 milligrams of manganese (roughly 20% of the daily value), a mineral involved in bone health and metabolism, along with 31 milligrams of magnesium. Beets contain meaningful amounts of vitamin C, iron, and potassium as well, though these are present in more modest quantities. The calorie count is low, around 58 calories per cup, with about 13 grams of carbohydrates and 4 grams of fiber.
Betalains: The Pigments Unique to Beets
The deep red-purple color of beets comes from betalains, a family of water-soluble pigments that double as potent antioxidants. Betalains split into two subclasses: betacyanins, which produce the red-violet color, and betaxanthins, which are yellow to orange. The most abundant betacyanin in red beets is betanin, sometimes called Beetroot Red.
What makes betalains interesting is their chemistry. Both structural components of betalain molecules are strong electron donors, meaning they readily neutralize free radicals. Betanin has been shown to scavenge multiple types of free radicals and was more effective than vitamin C at blocking a specific type of cellular damage involving peroxynitrite, a reactive molecule linked to chronic inflammation.
Betalains also interfere with enzymes that drive inflammation. Betanin inhibits COX-2, one of the same enzymes targeted by common anti-inflammatory medications, by up to 97% at sufficient concentrations in lab studies. It also inhibits lipoxygenase, another enzyme in the inflammatory cascade. These are laboratory findings, not clinical guarantees, but they help explain why beet consumption is consistently associated with reduced markers of inflammation in dietary research.
Nitrates and Blood Flow
Beets are one of the richest dietary sources of inorganic nitrate. When you eat beets, the nitrate gets absorbed and then reduced to nitrite by bacteria living in your mouth through what’s called the enterosalivary pathway. That nitrite is then further converted to nitric oxide in your body, a molecule that relaxes and widens blood vessels. This is why beet juice has become so popular for blood pressure support and athletic performance.
The blood pressure effect is fairly well documented. The nitric oxide released after eating beets causes blood vessels to dilate, which lowers the resistance your heart has to pump against. This process starts within a couple of hours of consumption and can last for several hours afterward.
Beets and Exercise Performance
The nitrate content in beets has drawn serious attention from sports scientists. Research compiled by the Australian Institute of Sport identifies a dose of roughly 350 to 500 milligrams of nitrate, typically consumed as concentrated beetroot juice about 2 to 3 hours before exercise, as the effective range for performance benefits. That’s equivalent to about 70 milliliters (a small shot) of concentrated beet juice.
The mechanism is straightforward: nitric oxide improves blood flow to working muscles and enhances how efficiently those muscles use oxygen. The practical result is that endurance athletes can sustain effort slightly longer before fatigue sets in. Interestingly, taking more than roughly 600 to 750 milligrams of nitrate doesn’t appear to provide additional benefit beyond the standard dose, so more isn’t necessarily better.
Red Beets vs. Golden Beets
The variety of beet you choose affects which antioxidants you’re getting. Red beets are rich in betacyanins, the red-violet pigments responsible for their characteristic color (and their tendency to stain everything they touch). Golden and yellow beets contain higher levels of betaxanthins, the yellow-orange pigments. Both types of betalains function as antioxidants, so neither color is nutritionally “better” in any absolute sense. The mineral and fiber content is comparable across varieties.
If you’ve avoided beets because of the strong earthy flavor, golden beets tend to be milder and slightly sweeter. Chioggia beets, the striped “candy cane” variety, lose their distinctive rings when cooked and have a gentler flavor as well.
Don’t Throw Away the Greens
Beet greens, the leafy tops attached to the root, are nutritionally distinct from the root itself and arguably more nutrient-dense. They’re high in vitamin A, which supports vision and immune function, and contain significantly more iron and calcium than the root portion. The greens are also a good source of fiber.
You can sauté beet greens the same way you’d cook Swiss chard or spinach. They wilt quickly and have a mild, slightly mineral flavor. Since most grocery stores sell beets with the greens still attached, using them is essentially getting a second vegetable for free.
Fiber and Digestive Health
A cup of raw beets provides about 4 grams of fiber, a mix of soluble and insoluble types. The soluble fiber feeds beneficial gut bacteria, while the insoluble fiber adds bulk that helps move things through your digestive tract. Beets also have a high water content, around 87%, which further supports digestion.
One thing worth knowing: the betalain pigments in red beets aren’t fully broken down during digestion. This means your urine or stool may turn pink or red after eating beets. It’s called beeturia, it’s harmless, and it happens to roughly 10 to 14% of the population. If you’re not expecting it, it can be genuinely alarming, so consider this fair warning.