Popularity of the Paleo Diet on internet has grown 400%+ in the last 3 years.
Take a look at this search you can do on Google Trends.
Popularity of the Paleo Diet on internet has grown 400%+ in the last 3 years.
Take a look at this search you can do on Google Trends.
With the surge in interest around the Paleo Diet in the last few years, maybe you’ll be seeing this during “Dancing with the Stars” soon!
Paleo Approved Label from Randal Kirk II on Vimeo.
Are these Vitamin D pills making me sick?
“I want to be healthy, so I started taking Vitamin D supplements. Now I feel terrible. I’m worried I have Vitamin D toxicity! What are the Vitamin D overdose symptoms? Am I in serious danger?”
You may have this fear when starting Vitamin D supplementation. So, “How much Vitamin D is right right amount me to take?”
But first, just in case you or your child has overdosed on Vitamin D, call 911, your physician, and/or poison control. If you have any doubt whether you need medical attention for any reason, please call 911 or your physician as well. Better safe than sorry.
Search for some short-term signs of Vitamin D overdose and here’s what you’ll find:
loss of appetite,
diarrhea, constipation,
nausea and vomiting,
bone pain,
drowsiness,
headache,
irregular heart beat,
muscle and joint pain,
high blood pressure,
kidney failure
And here’s what you’ll find if you search for longer-term signs of Vitamin D overdosing:
Increased risk of kidney stones
Nerve Issues – numbness, pain, burning, prickling, parasthesias, etc.
Muscle – pain, cramps, atrophy
A large part of what happens during overdose/toxicity of Vitamin D: hypercalcemia (hi blood level of Ca++, or too much calcium in the blood) which causes the host of other symptoms.
So, because I’m not a physician, remember: If you have any doubt whether you need medical attention for any reason, please call 911 or your physician as well. Better safe than sorry.
You won’t find a single case of someone having Vitamin D overdose symptoms from sun exposure alone (and not taking Vitamin D supplements). There are very rare cases of people with Vitamin D and sun sensitivities, but there are no documented cases of overdosing on Vitamin D from sun exposure.
In fact, some researchers suggest that our “natural” limit for Vitamin D (from sunshine) is around 10,000 IU’s per day. This is the amount of Vitamin D thought to be gained from total-body sun exposure per day. [2]
What’s next if you suspect you have overdosed? First, get medical attention, I’m not a physician.
Next, your physician will likely run tests to confirm that you have hypercalcemia (the main symptom of Vitamin D overdose).
If your physician thinks you have indeed overdosed on Vitamin D, they immediately ensure that you are not taking any more Vitamin D. Then, they’ll begin lowering your calcium levels with IV hydration, corticosteroids, and bisphonates.
Although the US Recommended Daily Allowance for Vitamin D is 400 IU’s per day, it will take tons more that to kill a person (except in the rare hypersensitive person).
In 2007 Poison Control [4] reported Vitamin D statistics of: 596 total exposures, 1 major outcome, and 0 deaths.
So, there are actually EXTREMELY few cases of death resulting from Vitamin D. But, then again most people don’t dabble in extremely high doses of Vitamin D supplements. So, it’s unlikely, but be smart about it.
There are far more people suffering from Vitamin D malnutrition than there are people suffering from overdose. In the words of Vitamin D expert, Dr. John Jacob Cannell, MD, “…worrying about vitamin D toxicity is like dying of thirst in the desert while worrying about drowning.” [3]
From the Office of Dietary Supplements at the National Institutes of Health, you’ll find that “tolerable upper intake levels” (maximum daily intake unlikely to cause adverse health effects) for children 0-12 months in age is 1000 IU’s per day. For children ages 1-14 it is 2000 IU’s per day.[5] According to the same article, adults also have a tolerable limit of 2000 IU’s per day.
These tolerable levels are being pushed by many scientists and researchers. Some suggest using 5000 IU’s of Vitamin D supplementation is safe for adults. To play it safe, stay within the published NIH ranges, however. If you decide to deviate as it may or not be safe, please be sure to get your Vitamin D blood levels tested regularly and consult with your physician.
=================
[1] Jackson RD, LaCroix AZ, Gass M, Wallace RB, Robbins J, Lewis CE, et al. Calcium plus vitamin D supplementation and the risk of fractures. N Engl J Med 2006;354:669-83. (http://www.ncbi.nlm.nih.gov/pubmed/16481635?dopt=Abstract)
[2] Reinhold Vieth, Vitamin D supplementation, 25-hydroxyvitamin D concentrations, and safety, American Journal of Clinical Nutrition, Vol. 69, No. 5, 842-856, May 1999.
10,000 is our bio-natural limit for Vitamin D – http://www.ajcn.org/cgi/content/full/69/5/842
[3] John Jacob Cannell, MD, Executive Director of the Vitamin D Council – http://www.vitamindcouncil.org/vitaminDToxicity.shtml
[4] Bronstein AC, Spyker DA, Cantilena LR Jr, Green JL, Rumack BH, Heard SE. 2007 Annual Report of the American Association of Poison Control Centers’ National Poison Data System (NPDS): 25th Annual Report. Clin Toxicol (Phila). Dec 2008;46(10):927-1057.
[5] http://ods.od.nih.gov/factsheets/vitamind.asp#h8, which refers to Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes: Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press, 1997.
You asked, so I guess I should tell you. It started me chasing after this paleo diet thing. It started me thinking about the most natural diet we can possibly get to. What made me think that there could possibly be a philosophy behind eating and health?
Have you ever read a book that seemed unify all of your theories into one grande scheme that makes total sense? Aha, I see how it all fits together now!
I was trying to make sense of all of these studies about cancer and heart disease and auto-immune diseases and nutrition and obesity… One day Marshall told me that I was doing “The Paleo Diet.” I asked what he meant and he described that it was what paleo man ate. I thought about it.
Then, I bought a book. And the clouds parted as the sunshine beamed down on me!
Dr. Loren Cordain’s “The Paleo Diet – Lose Weight and Get Healthy by Eating the Food You Were Designed to Eat” was that book for me. Complete with 100 paleolithic recipes, “The Paleo Diet” brought together years of studying health and 5 years of biochemistry for me. It’s simple after reading the book, but it’s more than just eating lean meats, fruits, vegetables, and nuts.
For example, Dr. Cordain’s research indicates that eating more protein than other macronutrients is just one key to why people lose weight so easily on the paleo diet. He describes dietary-induced thermogenesis and how it impacts your weight. And he shows how the paleo diet combats insulin-resistance and reduces hunger.
But he also answers these questions: Did a paleolithic man eat salt? How did he exercise? Did he eat more of any particular types of foods? How should you start the three levels of the paleo diet? What lists of actual foods can I eat on the paleo diet? How much can I eat and when? How do you cook paleo food?
To be honest I wasn’t out to lose weight when I started. What hooked me was that I had researched my way into finally lowering both my cholesterol and blood pressure to levels well below “acceptable” (you can see my “results” on another post). Then, I read his book and I think, “if only I’d known it could be so simple, I could have skipped the stress of a lot of other reading.”
You’re probably doing your own research right now. Good. You’ll find a lot of junk on the internet. Are their claims backed up with clinical studies? If not, BEWARE. You need to, at the very least, read the abstracts of the underlying studies. “The Paleo Diet” has over 300 references to studies, etc.
Summary: If you want the benefits of the world’s best and most natural diet, you should start with reading “The Paleo Diet” from Loren Cordain.
For the sake of full disclosure, I think it is important that I tell you that if you click on my link and you happen to buy this for $10 or whatever it costs now, I will get a 4% commission, or around $0.40. I loved the book, I believe in the book, and I’m telling you about the book, so why not make a few cents here and there?
“How can you say the paleo diet is the BEST way to lose weight?” One day my physician asked me, “just how did you get your weight, blood pressure, and cholesterol down so much?”
You will not go hungry on the Paleolithic Diet. This is the most important aspect to have in a weight loss plan that you decide try.
Most diets claim to be the best way to lose weight and simply don’t work for the majority of people. Even when a diet does work for you and you are feeling great about losing all your extra weight, most ALL of them are followed by the “stealthy months” of gaining weight back and you end up heavier than when you started the diet.
On the paleo diet you eat foods that naturally balance your insulin/leptin biochemistry to prevent you from starving and you can easily eat enough food to feel “full”. So, do this thing right, and you will not go hungry!
Gaining weight in the post-diet “stealthy months” is caused by the starvation state that you have caused in your body. We know, now, that body weight is regulated by complex biochemistry based on our genes and what we do to affect those genes’ expression. Essentially, when you starve your body for weeks or months on a diet, your body “perceives” this as a famine and slows its metabolism and increases your long term desire for foods.
The paleo diet was created for you and your unique human physiological needs. Actually, I guess this depends on your beliefs. Die hard evolutionists would say that the diet existed first and that over millions of years (up until 10,000 years ago) we evolved and adapted to optimally consume the paleo diet that was available to us. This is a great argument, but you could also view it as a diet that was provided during creation for hunter-gather humans or prehistoric man.
Either way, the paleo diet is what we as humans would naturally eat over time, if we were dropped off in a jungle (or any other uncivilized place in the world) by ourselves with no way to escape. We would hunt for animals and gather berries and watermelons. We wouldn’t be eating wheat in the massive amounts like we eat today and we, surely, wouldn’t be eating McDonalds and cheesecake.
Eating our originally intended diet normalizes your weight. In time you gravitate to your natural weight.
Only a fool doesn’t realize today that you should eat natural foods versus anything man-made or processed. But not everyone follows this wisdom. A huge reason that the paleo diet is the best way to lose weight is that you won’t find any artificial sweeteners and artificial colors in it. You wont find any chemical preservatives either. It is a natural foods diet.
Artificial sweeteners, like sucralose and aspartame, have research that is mounting against it saying that they are linked with cancers, autoimmune diseases, etc. Entire books have been written by physicians showing how bad these things can be.
Most diets focus on getting the most taste per calories eaten. The paleo diet focuses more on getting the most nutrients per calorie of food eaten. When you supply your body with proper and natural nutrition you won’t constantly crave more and more food. Instead you eat plenty of fruits, vegetables, lean meats, and nuts which will give you all the nutrition and satisfaction you need.
Compare this to a typical American diet of sandwiches, pizza, hamburgers, soda pop, blah, blah. These foods have tons of calories and very little natural nutritional value. You get the infamous “empty calories” and nothing to show for it. There is nothing better than great nutrients from natural foods.
I was amazed at about the three month mark of being on the paleo diet. I started thinking things like bananas tasted great. Not that they tasted good, but that they tasted great. My wife had to force me to eat fruits and vegetables before I started the paleo diet. But, now…grapes, blueberries, chicken breast, turkey burger, spicy vegetables, I love them all. As I write, I can honestly say that my mouth is watering.
Yet another reason, why the paleo diet is the best way to lose weight is that paleo-oriented exercise is easier than any other exercise I’ve done in the past. I didn’t say that you don’t exercise on the paleo diet, but it is easier than traditional marathon running and lifting weights for an hour.
On the paleo diet you walk, run, and do resistance training, but in a much more fun (for me) way. Instead of jogging or doing aerobics for 60 minutes you walk. A caveman would think we were nuts for jogging forever and getting worn out. Instead he would occasionally sprint, at full speed (to chase a rabbit or escape a bear), and rest. Then, for most of the day he would walk at a sustainable pace. Every once in a while he’d need to move a log or lift a rock.
Lastly, hunter-gatherers were solo travelers all the time. They would have walked and worked with their families. So, I’ve found it wonderful to get my workouts at the playground where my kids are playing and to get my walks in by pulling them in a wagon to the playground.
So, the exercise is more fun, easier, and less hard on your body. Rather than over-training, you are sustainable and have time to rest and rebuild.
I’m not sure how much of the energy increase I’ve had is from:
But, one thing I know for sure is this: There are days now that I am crackling with energy! And I just don’t get those days of tremendous exhaustion.
For brain health, the paleo diet was the best way to lose weight for me too. Not only do most other diets make you hungry at some point which makes you less able to focus, but they don’t provide the proper nutrients that your brain needs.
For example, there are tons of studies showing the benefits of fish oils and omega 3 fatty acids on brain health. Guess what? Our caveman friend ate tons more omega 3 fatty acids than we do today in America. [show study]
My experience has been that I feel much more focused at work and much less “brain fog.”
Because we’ve seen such an increase in auto-immune disorders in the last 40 years this benefit is pretty huge. What have we done wrong in the last 40 years? What has changed? There are many theories, but one everyone agrees on is our diet.
Thanks to researchers like, Loren Cordain, we are learning more every year about how the Paleo Diet can decrease or prevent certain autoimmune diseases. Diabetes, Lupus, and Multiple Sclerosis (MS) are just a start of a long list of autoimmune diseases that may be helped or prevented by the Paleo Diet.
This was a major reason I ended up on the paleo diet in the first place. I eliminated things from my diet, based on scientific research, until I was left with nothing else but the Paleo Diet.
Leptin is a recently discovered hormone that tells your brain that you have eaten enough. It comes from fat cells in your body, the more fat you have the more leptin is released. Chronically high levels of leptin result your body requiring higher amounts of leptin to signal to your that you are full over time. So, your point of fullness is higher and you eat more to retain your weight.
This is very similar to insulin resistance, where chronically high-carbohydrate meals cause chronically high levels of insulin, which causes insulin resistance over time. Insulin helps take glucose from your blood so it can be used by muscle cells among others. Among other foods on the paleo diet, recent studies are showing that coconut oil protects against insulin resistance.
A wonderful reason that the paleo diet is the best diet for losing weight is that it is beneficial in both leptin and insulin resistance. With this biochemistry normalized it is much easier to naturally lose weight.
Eating a variety of foods in a way that balances your macro-nutrient intake reduces inflammation (a good balance of protein, carbohydrates, and fats). The foods you’ll eat on the paleo diet will reduce the acidity your pH if you are like most Americans. Low alkalinity (high acidity) has been associated with increased inflammation.
Natural fruits and vegetables reduce your blood sugar spikes which are strongly associated with overall inflammation.
Fish (and walnuts, etc.) and its omega 3 fatty acids are strong reducers of inflammation.
Who can argue with eating more fruits and vegetables? On the paleo diet you’ll do that, but you’ll eat just the right fruits and vegetables. You’ll also eat more lean meats. This, of course, cuts way down on your simple sugar intake. I can tell you that my cholesterol and blood pressure went down DRAMATICALLY after a few months of being on the paleo diet.
On the paleo diet you’ll get more antioxidants than most other diets let alone more than the typical American diet. These antioxidants will be naturally occurring in food and won’t come with preservatives or clogging agents found in many vitamins and supplements. The antioxidants and other “anticancer” agents in foods in the paleo diet will be optimally absorbed as well.
Finally, if you can’t stick with a diet, it will do you no good. When you lose weight and gain it back months later, you do nothing but more harm to your weight, fat composition, and healthy biochemistry.
So, it is extremely important that people can stick with a change in the eating habits. Some people do well with drastic changes and sticking to them if they have a big enough motivation. Most people, however, will need either some lifelong help or be able to take baby steps.
With the paleo diet you can start slowly. As long as you commit to a long term plan, you could for example, eat just one MORE orange per day for a week. Then, eat one MORE chicken breast with a meal every day for the next week. The next week, you could eliminate all dairy… This way you can “ease” into the diet and if you stop progressing, well, at least you’ve made some sustainable changes that you can benefit from for life.
Ok, so this is a work in progress and I’m not done yet. I’d like to add more studies to it, but don’t want to make it too boring. What do you think? And I’d like to make it the “top 10 reasons” the paleo diet is the best way to lose weight, but I have too many reasons. Which reasons should I keep?
If you’re reading this, I’ve probably given this link to you, as a friend, after talking about the huge importance of getting enough Vitamin D. This is the first of many Vitamin D – related posts.
The common cold, perhaps the most complained about “disease” in all of humanity. You can bet that modern day office worker has more colds than a paleolithic outdoors man did. In fact, if you can avoid a Vitamin D deficiency (and most people are deficient), one study shows that you reduce the number of colds you get in a year by 70%. So, if you normally get 10 colds per year, you could possibly only get 3 with proper Vitamin D levels. [1]
My experience in the first year of supplementing with Vitamin D confirmed this statistic for me. I did get 10 colds per year and I hated it (feeling bad, lost productivity, lost fun with the kids, etc). But, a year later I realized that I had had drastically fewer colds that year. And the couple colds that I did get only felt like they lasted a few days rather than a miserable 2-3 weeks. In the years since then, I have continued optimizing my Vitamin D levels and have continued having this drastically lower rate of colds.
Another study shows that the risk of respiratory infections goes up drastically as your levels of Vitamin D go down. At levels below 10ng/ml 24% of subjects reported a recent respiratory infection, whereas only 17% of respondents with levels 30ng/ml reported recent respiratory infections. That is a 41% increase in risk of respiratory infection if you are low on Vitamin D [2].
Children benefit from proper Vitamin D levels too. An Indian study shows that children under the age of 5 are more than 3x as likely to get a respiratory infection when their Vitamin D levels are lower than 22.5 nmol/l versus above the same level [3].
I agree with Dr. Mercola (his newsletter) that good amounts of Vitamin D across the population are more powerful and more safe in fighting the flu than the flu shots are.
Ok, so how many people are vitamin d deficient and how do I know if I am? 42% of adolescents according to one study [4], and many more depending on who you ask and at what level is considered “deficient.” This study considered anyone with levels below 20ng/ml to be Vitamin D deficient. Many others would suggest that you need 50ng/ml for optimal health and reducing colds. This post (blog post not released yet) shows who is deficient and by how much, but for now, go get your Vitamin D levels tested by your physician.
Vitamin D is best obtained from natural sunlight. How much sunlight is enough is debatable and will be handled in another post. 
A caveman would be out in the sun every day looking for food doing his hunting and gathering. Where do you spend most of your time? In a cubicle/office? Indoors at home? You are likely Vitamin D deficient.
Supplementation, may be next best thing to natural sunlight. Read (blog post not released yet) for more sources of Vitamin D.
Conclusion: Vitamin D deficiency could dramatically increase the number of colds your family gets this season.
————————–
Sunrise image above: http://www.flickr.com/photos/lrargerich/ / CC BY 2.0
Sunbathing image above: http://www.flickr.com/photos/jonathan_hamner/ / CC BY 2.0
[1] http://www.independent.co.uk/life-style/health-and-families/health-news/the-sunshine-superstar-study-reveals-vitamin-d-as-wonder-vitamin-444599.html
[2] Association between serum 25-hydroxyvitamin D level and upper respiratory tract infection in the Third National Health and Nutrition Examination Survey. Arch Intern Med. 2009 Aug 10;169(15):1443.
[3] Wayse V, Yousafzai A, Mogale K, Filteau S. Association of subclinical vitamin D deficiency with severe acute lower respiratory infection in Indian children under 5 y. Eur J Clin Nutr. 2004 Apr;58(4):563-7.
[4] Prevalence of Vitamin D Deficiency Among Healthy Adolescents. Catherine M. Gordon, MD, MSc; Kerrin C. DePeter, BA; Henry A. Feldman, PhD; Estherann Grace, MD; S. Jean Emans, MD. Arch Pediatr Adolesc Med. 2004;158:531-537.
Turkey burger nutrition is phenomenal! We know that lean meats were a large part of the paleolithic diet and turkey burger fits right in. Turkey is a good source of iron, zinc, potassium and, of course, protein. It is such a great source of protein that eat it everyday.
Of course, wild turkey would be best, but for convenience and cost, lean turkey burger is a great choice.
Turkey is one of the leanest meats making it a great protein for those watching their saturated fat intake. A typical 4 ounce serving of very lean hamburger has much more saturated fat than the same very lean turkey burger. Whether saturated fat is categorically causal in heart disease has been questioned recently. Nonetheless, eating lean meats will allow you more control of the types of fat you decide to eat.
Lean turkey burger is great for reducing your appetite. In fact, it takes more energy to metabolize protein than other macronutrients. So you can burn more calories just metabolizing turkey/protein compared to other foods. According to researchers, “There is convincing evidence that a higher protein intake increases thermogenesis and satiety compared to diets of lower protein content.” [1]
Theoretical turkey burger is great but, I have found it very difficult to find LEAN turkey burger that is both convenient and cheap. I’m told that many of you have found
the same.
So…I was thrilled to find easy-to-cook, lean turkey burger at a great price at Costco! You have to get the patties and not the ground turkey as the “ground turkey” sold is much higher in fat.
Costco turkey burgers compared to other brands is both very LEAN and cheap…about $2.50 per pound. It is also very convenient to grill and freeze.
Nutrition Facts
Serving Size: 1 Burger
Amount per Serving
Calories 200 Calories from Fat 50
% Daily Value *
Total Fat 5g 8%
Saturated Fat 1.5g 8%
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Trans Fat 0g
Cholesterol 85mg 28%
Sodium 390mg 16%
Potassium 0mg 0%
Total Carbohydrate 2g 1%
Dietary Fiber 0g 0%
Sugars 0g
Protein 35g 70%
Maybe the best part of Costco’s turkey burger patties is the simplicity of the ingredients:
Ingredients listed on the back of the package:
It doesn’t get any simpler and natural than that! Well, I guess we could do without any added salt, but this is about the best I’ve seen.
[1] Dept. of Nutrition, Harvard School of Public Health, 665 Huntington Ave, Boston, MA 02115, USA., http://www.jacn.org/cgi/content/full/23/5/373
Wild Turkey Photo above: http://www.flickr.com/photos/rickh710/ / CC BY 2.0
We’ll be sharing more paleolithic recipes going forward to demonstrate how easy it is to eat paleolithic foods. Who knows, maybe we’ll compile a paleolithic cookbook! Until then here are some zesty paleo recipes: Paleo Eating for Modern People – Cookbook
Just because you are taking on more paleo eating habits doesn’t mean you don’t get to eat dessert anymore! This is one of my favorite desserts and was inspired by seeing a banana dessert at a Thai restaurant one night. I eat this a few times per week. It calls for bit of honey which you can eliminate if you are trying to lose weight.
Why cook a banana? You’re right if you’re worried about losing nutrients, but cooking a banana enhances its aroma, sweetness, and texture.

I’ve tried other types of nuts, which taste great, but none of them have the great Omega 6 to Omega 3 ratio that walnuts have.
This contains relatively no protein, so be sure you have a good amount of protein for dinner first…and look forward to more Paleolithic Recipe examples!
I used to pay $50 per month to go a simple gym and do weight training. As my nutrition and fitness passion has evolved, so to speak, I’ve begun trying to get great workouts without going to they gym.
One of the easiest places to get creative with resistance training is the playground that I go to with my kids! I get to spend time with the kids and simultaneously get a great workout. I don’t have to feel guilty about leaving them for an hour to go to the gym and I don’t have to pay $600 per year to be a member at the local fitness club.
It’s just a matter of being DECIDING to get a workout at the playground…and doing it.
I saw this video and just had to share. I’ve been wanting to get a video camera on myself to show how easily you can do resistance workouts wherever you go without using weights. Until I get the videos published, get some ideas from this!
As a part of getting back to our natural paleolithic diet, we have to consider the amount of man-made chemicals we have introduced into our diet. Further, we have to look at the covariance of these introductions with disease rates, etc.
We find the promises of sucralose (mostly marketed as Splenda) disturbing. It may not kill us all in the next 24 hours, but given the choice I don’t think we should be using sucralose in place of natural sugars. See the following promises and our responses:
for some studies and you’ll see some people do metabolize and most of us store some of it without passing it through which also isn’t a good thing. Anyway, there are studies suggesting that artificial sweeteners in general actually INCREASE appetite. Eat sucralose, get more hungry? I guess so.Sucralose (Splenda) may be ok to eat according to studies across large populations, but these types of studies sure do raise red flags to me. Is it worth taking the risk?
So, yes, we do need to evaluate the new chemicals we are putting into our bodies. Our diets have changed drastically since the Paleolithic Age and we likely aren’t optimally running our bodies if we take new chemicals everyday that our bodies have never seen.
——————–
[1] Journal of Toxicology and Environmental Health, Part A, Volume 71, Issue 21, Pages 1415-1429, “’Splenda Alters Gut Microflora and Increases Intestinal P-Glycoprotein and Cytochrome P-450 in Male Rats”, Authors: M.B. Abou-Donia, E.M. El-Masry, A.A. Abdel-Rahman, R.E. McLendon, S.S. Schiffman
[2] Report from NICNAS, The Australian Government regulator of industrial chemicals (PDF)
Coffee Picture Above: http://www.flickr.com/photos/streamishmc/ / CC BY-ND 2.0
Scale Picture Above: http://www.flickr.com/photos/bensonkua/ / CC BY-SA 2.0