A Few PRUNES a Day Keep Osteoporosis Away?

Nutrition / July 10, 2017

If you have low bone density or worry about your bone health, you’ll want to know about this wonder fruit.

You may know it as the main ingredient in an “old person’s” juice, but it’s got a lot more going for it than you may think!

I’m talking about prunes… which are just dried plums.

Prunes are bursting with antioxidants like polyphenols, vitamin C, vitamin K, and fiber. They’re great at killing free radicals that attack your cells, which means they’re helpful to your bones too.

Prunes and osteoporosis

Dr. Bahram Arjmandi – Chairman of the Department of Nutrition, Food and Exercise Sciences at Florida State University – has had a keen interest in prunes for years now. (Especially since his research team found a promising link between prunes and bone density back in 2011.)

Arjmandi had studied many fruits to that point– in hopes he’d find the best ones for healthy bones. And the findings he got from the 2011 study in the British Journal of Nutrition led him to say:

Over my career, I have tested numerous fruits, including figs, dates, strawberries, and raisins, and none of them come anywhere close to having the effect on bone density that dried plums, or prunes, have.

Why the high praise?

Dr. Arjmandi and his team studied two groups of osteopenic postmenopausal women over 12 months. The first group had 55 women. They consumed 100 grams of prunes (about 10 prunes) each day. The second group of 45 women consumed 75 grams of dried apples each day. All 100 women also took 500 mg of calcium and 400 IU of vitamin D each day.

The result? After 1 year the prune group had “significantly” higher bone mineral density (BMD) in the ulna (a forearm bone) and the lumbar spine, compared to the dried apple group.

Arjmandi found the prunes helped decrease bone resorption rate. Basically, the prunes slowed down bone loss that naturally occurs with aging.

Again, these findings came from consuming about 10 prunes each day. Fast forward to today, and the news may be even better…

First, Arjmandi and company ran a 6-month trial seeing the effects of 50g and 100g of prunes on postmenopausal bone loss. Turns out, the lower dose (4-5 prunes) was about as effective as the double dose (10 prunes) in preserving bone.

That means you may be able to protect total body BMD with half the amount of prunes as before!

Second, Arjmandi and company created a follow-up study from the 2011 group of women– five years after their initial study. The scientists wanted to know if the prune group were able to maintain their higher BMD scores compared with the dried apple control group.

(It’s important to note that of the 20 women who participated in this new 2016 study, none of them regularly consumed prunes in the 5 years since.)

8 of the 20 women were in 2011’s prune group. And as it turned out, these 8 women did indeed show higher ulna and lumbar spine BMD compared to their dried apple counterparts!

True, the study didn’t take into effect other diet and lifestyle factors. But Arjmandi’s group was encouraged with the difference that prunes alone seemed to make.

In fact, the results of their study and those from their peers led Arjmandi to say prunes are a:

“… functional food therapy for preventing bone loss in postmenopausal women, with the potential for long-lasting bone-protective effects.

So… break out the prune juice, right?

Well, that may be a great idea. But before you do, it’s important to know the “why” behind the prune’s bone-friendly results.  

Science can’t guarantee which nutrients specifically contribute to the BMD differences. But… several compounds in the prune protect bone density on their own.

One of these compounds is boron. Boron is a natural trace mineral in the soil and in many foods. It’s a proven bone-builder and strengthener… and is especially helpful if you’re low in vitamin D!

Prunes happen to have higher amounts of boron than most fruits: 1.18mg in every 100g. In comparison, here’s the amount of boron in 100g of the following common fruits: 

  • Dates (4, pitted): 1.08mg
  • Oranges (1, small): 0.52mg
  • Apples (1 cup of slices): 0.32mg    

oranges for boron

What’s more, prunes have another 2 of the 13 trace minerals your bones need: copper and potassium.

Better still, prunes also contain vitamin K1. Vitamin K1 is anti-inflammatory and thus helpful because it helps prevent excessive osteoclast ( a type of bone cell that breaks down bone tissue) activation. K2, on the other hand, is the form that helps regulate your calcium levels. Think of vitamin K2 like a “recycling plant” for calcium: it brings calcium into your bones while filtering it out of your arteries, where it isn’t needed. This form isn’t in prunes, but we’ll tell you how to get it a little later….

Then there’s the soluble and insoluble fibers inside prunes, like pectin, fructans, and cellulose. These fibers help your bones absorb the minerals they need to stay dense.

As you can see, all these vitamins and minerals work together like a construction-crew for your bones! Each has their own role in creating the foundation and supporting parts of healthy bone.

To put the “cherry on top” of the prune… Arjmandi and co. have proven the antioxidant and anti-inflammatory powers of prunesPrunes have impressive free radical absorbing abilities, when compared with many popular fruits and veggies.

So, if you’re already a fan of prunes great! Your task should be an enjoyable one. Try to choose prunes without added sugar or preservatives. (And just a note: prunes are a natural laxative, so while too many may cause diarrhea, 4-5 prunes per day which was discussed in the study shouldn’t cause this effect in individuals with healthy bowels.)

Now, if you don’t like prunes, and are looking for a guaranteed way to safely increase your bone density, won’t you try AlgaeCal Plus? It’s risk-free to try it for an entire year.

AlgaeCal Plus contains plenty of boron (3 mg/day). It has a full daily dose of vitamin K2-7 (the most potent form of vitamin K2). And it also has copper, potassium and the other 10 trace minerals we haven’t even mentioned here!

It’s all part of a rare plant-based calcium harvested off the shores of South America. And when it comes to bone density, it’s changed tens of thousands of lives for the better.

Get more details on this page here.

Did you see all the bone-building evidence in prunes’ favor? If you don’t mind eating prunes, I think adding a few to your daily routine is wise. It’s time this wonder fruit gets its due… especially if you’re concerned about your bone density.

If you’re not a prune fan- or you prefer “sure things” to maybes- read about the world’s only superfood calcium source guaranteed to increase your bone density.   

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