Just two days of oatmeal cut bad cholesterol by 10%

(sciencedaily.com)

94 points | by gradus_ad a day ago ago

91 comments

  • brandonb 21 hours ago ago

    Fiber is the ultimate nutritional power tool.

    Not only does fiber reduce cardiovascular mortality by 26% (by cutting cholesterol), surprisingly enough, fiber even reduces your risk of cancer by 22%: https://www.empirical.health/blog/dietary-fiber-reduces-all-...

    (Oatmeal is high in fiber, among other things, which I think is part of what's going on here.)

    • davidmurdoch 21 hours ago ago

      Oatmeal is extra special because of it has high amounts of beta glucan, a soluble fiber.

    • EPWN3D 18 hours ago ago

      I wonder, do overnight oats wind up processing away a lot of the benefits? Do steel-cut oats have more of an effect on cholesterol than rolled?

      • ac29 7 hours ago ago

        > I wonder, do overnight oats wind up processing away a lot of the benefits?

        Overnight oats are just normal oats left in liquid overnight to skip the cooking step.

        What processing were you thinking of? If anything they are less processed than normal oats since they aren't cooked.

    • happytoexplain 20 hours ago ago

      Wait, how does fiber cut cholesterol?

      The article is a little densely worded.

      • jjtheblunt 20 hours ago ago

        iirc, from older articles, which differ from this nice result, bile acids contain cholesterol(s) and they're generally reabsorbed in the intestines, so the fiber is conjectured to bind with some before reabsorption, expelling the bound fraction of circulating cholesterol in feces.

        this result in the paper is very interesting in the conjecture is that the gut microbiome is altered in a beneficial way, and that the effect (with the resulting lowering of cholesterol) persists for weeks after even 2 days of oats.

        • kulahan 20 hours ago ago

          We know almost nothing about how digestion works, but fiber has the added benefit of lining your intestines, preventing the absorption of some nutrients. It also helps push things through, so they spend less time sitting around being absorbed.

    • canadiantim 20 hours ago ago

      I'd bet that oatmeal helps cancer due to increased elimination from the GI system, like any fibre

    • lanfeust6 20 hours ago ago

      In related fashion, you might be interested in reading about the impact of soy protein.

      • AnonC 19 hours ago ago

        Can you please elaborate and/or provide links?

        • aziaziazi 13 hours ago ago

          I'll recommend starting here https://nutritionsource.hsph.harvard.edu/soy/ (link of studies at the bottom of the page)

          Takeways related to parent:

          - "cardiovascular mortality ": > eating approximately 50 grams of soy protein a day (no small amount as this translates to 1½ pounds of tofu or eight 8-ounce glasses of soy milk!) in place of animal protein reduced harmful LDL cholesterol by 12.9 percent. [1] Such reductions, if sustained over time, could mean a greater than 20% lower risk of heart attack, stroke, or other forms of cardiovascular disease.

          - "risk of cancer": many studies shows breast and prostate cancer reduction, but that is probably more related to isoflavones (Phytoestrogen) than fibers.

    • buzzerbetrayed 20 hours ago ago

      Oh boy. Now we’re entering the fiber era. We’re just leaving the protein era. Before that it was the intermittent fasting era. Before that it was the keto era. The low fat era was probably a few before that.

      I hear about fiber constantly all of the sudden. You might be right about it, but how do we know it’s different than. All the past nutrition tends?

      • bulbar 17 hours ago ago

        Idk about cholesterol, fiber is well known to be very healthy. Same for protein.

        Losing body fat will often have the biggest impact by far if one is overweight, though. It also stabilizes blood sugar and has a lot of benefits in general.

      • zem 13 hours ago ago

        I'm in my 50s and I've been hearing about the benefits of fibre pretty much all my life. I doubt it's some sort of diet fad.

      • rybosworld 20 hours ago ago

        It is funny how you can break diet/nutrition into generations like this.

        I think the trends are a reflection of poor education. Fiber/protein/whatever being important components of a diet isn't new information. But the information is new to folks that never had nutrition explained to them.

      • strken 19 hours ago ago

        I feel like we're due for something really ridiculous next. I've been paying attention to macros, fibre, salt, and having a reasonably varied diet for years; we've done salt, fat, carbs, protein, and now we're doing fibre.

        "Eat a varied diet" seems boring but maybe those influencers selling pills made from 500 vegetables were ahead of the curve all along.

        • rmast 19 hours ago ago

          It would probably be better to just eat all those different vegetables as part of actual meals to get a varied diet, rather than in pill form.

          I was under the impression that more protein and less salt/fat/carbs are still kinda the trend? If more fiber gets added to the mix I guess it is essentially telling people to eat more plants, thus leading to more varied diets overall.

          • rickydroll 8 hours ago ago

            > I was under the impression that more protein and less salt/fat/carbs are still kinda the trend?

            kinda sorta. The low-carb, higher-protein diet is standard diet advice for T2D, and even more so if on a GLP-1 drug to reduce muscle loss.

      • bionaut 11 hours ago ago

        Because the trends are bullshit and nutrition is just not that complicated.

        The trends are a strange type of nutrition entertainment for people to read and then ignore in practice. There is some kind of psychological comfort in the knowing you can switch to oatmeal next week while gorging yourself at the Cheesecake Factory.

        Oatmeal is good for you. News at a 11. We have known this for at least that last 50 years.

      • midnitewarrior 9 hours ago ago

        Before manufactured insulin shots, the treatment for diabetes was a multi-day oatmeal fast. This has been around for many decades. The only thing that's changed is that you are finally hearing about it.

      • 7bit 12 hours ago ago

        I heard about fiber for the last 30 years. But I'm also not American.

      • Hikikomori 13 hours ago ago

        Heard about fiber all my life, but also went in school in Europe.

  • dtj1123 15 hours ago ago

    I routinely used to eat an oat based breakfast, and would then feel as though my blood pressure and energy levels were seesawing around for the rest of the morning. Turns out I have celiac disease with sensitivity to the protein in oats.

    Dropping this here in case anyone else has a mysterious and unpleasant reaction to oats.

    • Sverigevader 13 hours ago ago

      Wait, I don't understand. I thought oatmeal was gluten free, but because of where it's grown and processed, there's a lot of cross contamination with wheat. I buy gluten free oats because of this.

      https://celiac.org/gluten-free-oats-whats-the-deal/

    • ndsipa_pomu 8 hours ago ago

      I'm somewhat gluten sensitive (tends to make my psoriasis flare up) but used to have gluten-free oats for breakfast. Then the porridge seemed to increase my uric acid levels, leading to gout attacks, so I've had to stop eating them (oats are usually classified as mid-level purine content and thus should be only eaten once or twice a week for those prone to gout).

  • dataviz1000 20 hours ago ago

    Steal-cut oatmeal made in Insta Pot is the best thing in the world. I do 2.5 to 1 ratio. It is important to not let the steam out. It takes about 30 minutes plus another 10 to cool. Set it and forget it. Add raisons and cinnamon at the end. Or, let freshly minced ginger steep with some orange zest.

    • fumeux_fume 20 hours ago ago

      I make it on the stove top. It also takes 30 minutes to cook and 10 to cool. My ratio of water to dry oatmeal is 3 to 1 by weight in grams and I mix in honey after it's done.

  • 3eb7988a1663 21 hours ago ago

    I did this after it was first posted. My cholesterol is great, but it is a simple enough intervention, I mostly did it for the lols.

    Not terribly difficult, you never feel hungry. The worst part was how sore my jaw felt from the excessive chewing of the bulk mass. Which is funny for something so mushy, but my instinct was to chew it a good amount. Also, it is a lot of fiber. Feel like the effect might just have to do with cleaning out every surface of my digestive tract.

    • mrbombastic 20 hours ago ago

      I did it as well, 2 days of oatmeal (plus some chicken and toppings) and then oatmeal most days just one meal. Didn’t expect much…my cholesterol dropped 25% over a period of 3 months. One data point, will do another 2 days and see in another 3 months.

  • delichon 21 hours ago ago

    Oatmeal reliably spikes my blood sugar. Not as much as many other carbs, but enough that I avoid it. Each time an insulin resistant person eats it, it causes a little more permanent damage.

    Four out of ten US adults are insulin resistant.

    I have no idea how to balance the blood sugar damage with the cholesterol damage.

    • david-gpu 21 hours ago ago

      Not all oatmeal has the same effect on blood sugar. Steel cut oats are absorbed more slowly than instant oats. Toppings on your oatmeal also affect blood glucose in non-linear ways, the same as any other combination of foods.

    • nomel 21 hours ago ago

      I would think the type and preparation would play a significant role. There's steel cut (which can be made soft or "chewy"), firmer "old fashioned", and the quick dissolving mush that is one-minute.

    • roncesvalles 16 hours ago ago

      psyllium husk. zero calorie fiber

    • lanfeust6 20 hours ago ago

      glycemic index of steel cut is low, whereas large-flake is medium-high, and instant oats are high. Though you have to account for load.

      My approach is to have a modest amount and increase the nuts and chia mixed with it, alongside berries and yogurt.

    • clumsysmurf 20 hours ago ago

      Try oat groats, this will have the lowest GI. You can cook them like rice, even in a rice cooker, using the same technique ... for a firmer result use less water and cook for less time. You can start off with roughly 1:1 ratio of oat groats to water. I do .75 cups oat groats to 1.25 cups water.

    • OutOfHere 19 hours ago ago

      Use thicker oats, obviously. Also, add some ceylon cinnamon powder to it. Additionally, if you can tolerate it, also add ground fenugreek powder to it to further offset the absorption.

  • jader201 21 hours ago ago

    Previously (30 days ago, 355 points, 268 comments):

    https://news.ycombinator.com/item?id=46819809

  • alun 21 hours ago ago

    Oatmeal has become my favorite breakfast by far. It's delicious and never seems to never give me the "crash" that people describe with other carbs (probably due to it's low GI). Very easy to blend them into my protein shakes after a morning workout too.

  • Fire-Dragon-DoL 14 hours ago ago

    i eat an apple with a teaspoon of pistachio butter (sometimes two) for breakfast. If I am still hungry, I eat 150g of blueberries with some vegan organic protein powder (2 teaspoons) and cottage cheese.

    How can I tell if oatmeal would have more fiber?

    I also eat basically an entire romaine earth at lunch and cooked veggies at dinner.

    Fiber is definitely the only things that makes me full without making me fat.

  • heohk 20 hours ago ago

    Is it the oatmeal itself or the glyphosate present in all oatmeal?

  • lkbm 19 hours ago ago

    This is interesting and useful, but it's worth noting that this is ~1200 Calories a day, so that's a lot of what's going on outside the LDL effect.

    • marginalia_nu 13 hours ago ago

      Yeah it's a quite well known result you often see rapid improvements across several health markers from just a few days of calorie restriction.

  • bob1029 13 hours ago ago

    I'd like to point out that not all oatmeal products have the same nutritional value. Quaker instant oats might as well be a box of crackers or other snacky food compared to original or steel cut variety.

  • tim-tday 21 hours ago ago

    My doctor had me on statins because I tested with high cholesterol. I switched to oatmeal for breakfast. Stopped statins tested again. Totally normal.

    • Loughla 21 hours ago ago

      I've eaten oatmeal for breakfast, have a heart healthy diet, and exercise regularly. My total cholesterol and especially LdL are always massively high.

      My body hates me.

      • netcraft 20 hours ago ago

        I have high cholesterol, have had for more than a decade. Was on a statin, they didnt help. Doubled them, they didnt help. Changed my diet radically, lost 25 lbs (I was a little overweight, but not bad), ate full medeteranian diet and did everything I could, my numbers didnt budge. Changed to a stronger one and within two weeks my numbers were perfect.

        I believe for some of us its purely genetic.

        • EPWN3D 18 hours ago ago

          There are some people who just have high cholesterol but none of the other risk factors. I'm one of them. I did a calcium score on my heart, and it came back clean. The cardiologist basically said my cholesterol is just part of who I am, and it's not causing problems.

          If you're similar to me, you might want to get a second opinion. There are different kinds of LdL cholesterol, and the small, dense particles are the ones that cause blockages. Big puffy ones don't. I have mostly big puffy ones, but classifying them is a different test that has to be special-ordered.

          I also have a very low resting heart rate, exercise regularly, have a high VO2Max, and have a healthy diet. So the claim that I was at major risk of a cardiac episode just didn't pass the smell test. If it wasn't for those things, I probably wouldn't have asked questions when my doctor said I should go on a statin.

          • netcraft 6 hours ago ago

            unfortunately im not in the same situation. I have a high incidence in my family, my calcium score wasn't clean (especially for someone my age) and my vo2max isnt the best either. Though my many stress tests have always been fine.

            I don't think im in terrible shape right now, but looking ahead 10 to 20 years, without medical intervention I probably would be.

        • e40 13 hours ago ago

          What does “Changed to a stronger one” mean?

          • netcraft 6 hours ago ago

            yes, changed to a stronger statin.

        • lowercased 20 hours ago ago

          "Changed to a stronger one"

          Changed to a stronger one what?

          • mh- 19 hours ago ago

            I assumed they meant a stronger statin.

            • netcraft 6 hours ago ago

              yes, changed to a stronger statin.

      • dralley 20 hours ago ago

        My LDL is stuck between 145 and 155 permanently. Same for my mom and aunts. Oatmeal, exercise, etc. doesn't help.

        I'm still young so my doctor isn't terribly concerned, but in 10 years I'll probably have to be on statins.

        • zargon 2 hours ago ago

          You should question this and advocate for yourself. The important number is total lifetime exposure to LDL (actually apoB, but doctors aren't routinely testing that yet). The arterial damage is cumulative. You shouldn't wait until you are at high risk of cardiac events to take action. The time to slow down the progression is now.

          I'm just replying based on taking your comment at face value. LDL of 150 is very high and living with that for many years is very damaging. Obviously it's something between you and your doctor, I'm just encouraging you to consider and get reasoning from your doctor about whether this approach is really best for your health.

      • rmast 20 hours ago ago

        What do you mean by heart healthy diet?

        Egg whites, lean meats, etc? Strict whole food plant based?

        • Loughla 10 hours ago ago

          Mediterranean but also I like a good beef dish occasionally, so mostly Mediterranean with the occasional filet or tacos de lingua or something.

    • ridiculous_leke 21 hours ago ago

      What do you have for breakfast before that if I may ask?

      • tim-tday 20 hours ago ago

        Used to have a single egg, slice of peperjack cheese draped over it and some fruit. sometimes + meat of some sort. Nothing I thought of as overly unhealthy.

        • rmast 19 hours ago ago

          All of those things (other than the fruit) have cholesterol. Cheese and meat can also be quite a bit of saturated fat.

          • jghn 18 hours ago ago

            Dietary cholesterol has very little causation with blood cholesterol

    • brianwawok 21 hours ago ago

      Mmm oatmeal. Breakfast of champions. I usually do it for about 330 days a year. Take a month off every once in a while..

    • WarOnPrivacy 21 hours ago ago

      How do you take your oatmeal?

      • ThrowawayP 20 hours ago ago

        If you make plain oatmeal with less water so that it is thick rather than runny, it can be treated like a side dish like mashed potatoes or polenta in a savory meal. It can be a bit odd at first for people who are used to thinking of oatmeal as a sweetened food but it's something one can get accustomed to quickly and avoids the downside of consuming extra sugar.

        • roncesvalles 16 hours ago ago

          In my opinion oatmeal is better as a spicy-savory rather than a sweet dish. You could add black pepper and a bit of salt to it and maybe a hot sauce for even more flavor. Montreal steak spice also works well.

          Could take it to the next level with green peas, diced carrots and other things.

          In fact once you go savory, you'll never go back. Sweet oatmeal grosses me out.

          • zem 13 hours ago ago

            look up upma, a semolina based indian breakfast dish that can be adapted to oats pretty easily.

      • derwiki 21 hours ago ago

        Savory: add a fried egg, soy sauce, and cottage cheese

        • Noumenon72 21 hours ago ago

          Like stirred in? Or as sides?

          • Lord_Zero 21 hours ago ago

            I think that was a joke, all those things increase cholesterol. Egg yolks high in bad cholesterol, soy sauce has tons of sodium, and cottage cheese high in fat.

            • strken 19 hours ago ago

              Cottage cheese is quite low in fat for cheese. The one at my local supermarket is 11.3g protein, 2.4g fat, 6.3g carbs, and it's not a diet version.

              It's still very salty and most of the carbs are in the form of the sugar lactose, I'm not really recommending it as a health food, it's just comparatively low in fat.

            • derwiki 18 hours ago ago

              Haha sorry never meant to imply it was a cholesterol friendly meal, it’s just how I make my oatmeal.

            • KittenInABox 20 hours ago ago

              IIRC the relationship between cholesterol and diet is more complicated than eating cholesterol == more cholesterol. Especially in this case you're eating cholesterol with a high-fiber meal which prevents a significant amount of the absorption of it.

      • jcynix 18 hours ago ago

        We heat up unskimmed milk, add oatmeal, let them soak for at least 10 minutes. Then serve them and pour a little bit of cold milk over the cooked oatmeal. Plain, or add some fresh fruit, nuts, berries to taste.

      • kulahan 20 hours ago ago

        I like a splash of maple syrup, oat milk, and maybe half a packet of sweetener if I'm feeling cheeky. Cocoa nibs and dried fruits are excellent too.

      • tim-tday 20 hours ago ago

        I use minute oats. Drop in boiling water, toss in a Half handful of raisins or crasins.

      • nomel 21 hours ago ago

        I usually eat mine like cereal, uncooked old-fashioned in cold milk, with a bit of honey or brown sugar for flavor. Apparently this is normal overseas.

        Steel cut is just a different thing altogether. I like mine a bit on the firm side, with butter, brown sugar. On top, some plain yogurt pair nicely. Cranberries and walnuts are pretty great too.

        I think one-minute/instant oatmeal is terrible, no matter how it's prepared, which is unfortunately most people's first experience with oatmeal.

        • OutOfHere 19 hours ago ago

          Honey is good, but there is never a reason to add any sugar even if brown. Oatmeal can be sweetened with practically any fruit. Berries work really well, whether dried or fresh. I add wild blueberries.

          • ac29 7 hours ago ago

            > Berries work really well, whether dried or fresh.

            Frozen berries work really well too and they are much cheaper than fresh. Just have to leave them out for an hour (or overnight in the fridge) to thaw

      • nlawalker 20 hours ago ago

        Peanut butter, chia seed and banana slices.

      • lanfeust6 20 hours ago ago

        I soak mine overnight with nuts, in water and a tsp of yogurt, then drain/rinse off in the morning. Steel-cut if I'm cooking it stove-top, large-flake if I'm just microwaving the oats. Serve with the nuts, alongside berries and whatever else.

        Years ago I'd sometimes go over-the-top with homemade kefir, cocoa nibs, lemon zest. I stopped the kefir habit not so much because of the hassle but because I didn't want to consume that much volume of dairy every day. I get enough lactic acid from kimchi, and protein from other sources.

        • fibonachos 19 hours ago ago

          Overnight oats have been my go to lunch and pre workout meal for a couple years now.

          75g 0% Greek Yogurt, 75g Almond Milk, 10g Maple Syrup, 8g ISOpure unflavored protein powder, 8g PBfit powdered peanut butter, Salt to taste. Whisk everything else together in one bowl. Pour over 85g of old fashioned oats and stir.

          511 calories, 79g carbs, 30g protein, 9g fat. Easy to tune the recipe to macro targets.

          Cholesterol numbers are great.

      • benatkin 21 hours ago ago

        Good: Oat flakes. I like Bob's Red Mill in North America and Karavansay in Colombia. Boil them a short time, drain part or all of the water, and eat them with a little bit of honey or a fruit such as blueberries.

        Bad: Oatly

      • OutOfHere 19 hours ago ago

        I add 1-2 tbsp of soy milk powder (not to be confused with soy protein powder) which adds bulk. In the end I add wild blueberries to sweeten it. Sometimes I add chia seeds, especially if I can leave it soaked overnight.

      • soopypoos 21 hours ago ago

        Buttered

    • davidmurdoch 21 hours ago ago

      From what LDL-C or AboB level to what?

  • joshribakoff 21 hours ago ago

    This has been widely known in bodybuilding and powerlifting circles, people abusing performance enhancing drugs eat things like oats to mitigate the harmful effects of the drugs on their cholesterol, and regularly do blood work to monitor it and see that it is working.

  • poltomo 18 hours ago ago

    Supposedly, eating food with vitamin c before eating oatmeal improves iron absorption from the oatmeal.

  • OutOfHere 19 hours ago ago

    > Participants followed a calorie restricted plan made up almost entirely of oatmeal for 48 hours.

    Oatmeal is great, but a calorie restricted diet made practically entirely of oatmeal isn't exactly a useful determinant.

  • lanfeust6 20 hours ago ago

    I consume these so often for breakfast that I've calibrated the "core" meal many times. Personally I think the optimal amount is less than you would think, to make room for other ingredient pairings like berries, nuts and fermented dairy.

    It's not the laziest method but I like soaking them overnight. Without being too fussed about phytic acid in a balanced diet, soaking still improves digestibility and nutrient absorption.

  • kkfx 16 hours ago ago

    Honestly? It's advertising, not biology.

    All starchy foods make cholesterol go up, while all animal proteins make it go down, since digesting them consumes LDL. People only campaign against this scientific evidence because there are so many of us in the world, too many, and there isn't enough animal protein for everyone, especially if you focus on economically profitable production instead of distributed subsistence production wherever possible.