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High Protein Vegetables

Many of us have heard the importance of getting adequate protein at each meal due its role in keeping us full, but for those who are vegan, vegetarian, or trying to minimize their carbon footprint, finding non-meat sources of protein can be challenging. The good news is you might be surprised to learn that vegetables can be a source of protein as long as you know which ones to choose and get adequate amounts. Here we’ll give you our top picks and which ones rank high on Dr. Sears’ approval list.

Dr. Sears Best of the Best: The following vegetables rank high in Dr. Sears’ opinion when following the Zone Diet. The reason for this is not only are they a good source of protein, but their ratio of protein to carbohydrate is high, ensuring that you maintain the ideal hormonal balance once consumed. Plus they are rich in fermentable fiber and polyphenols, making them a great addition to any PastaRx Fusilli or Orzo dish.

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Spinach: 2 cups of fresh spinach = 3 grams of protein.

3 grams of protein might not sound like a lot, but if you’ve ever cooked with spinach you know how quickly it wilts down to almost nothing. One 10oz package of baby spinach (probably shrinks to about 1+ cups once cooked) supplies 7 grams of protein not to mention being a powerhouse when it comes to our daily intakes of vitamins and minerals (e.g. supplying 1100% of the Daily Value of Vitamin K). Low levels of vitamin K in the blood have been linked to a higher risk of bone fractures, so this is a great way to boost your levels. In addition to Vitamin K, 10oz of spinach meets your entire daily intake for Vitamin A, 89% Vitamin C and is rich in Calcium, Iron, Magnesium and Manganese. Of course cooking or sautéing gives you the most bank for your buck nutritionally speaking based on how much you can consume, but even replacing iceberg or romaine with spinach in your salads can really elevate its nutritional profile.

Mushrooms:  1 cup of mushrooms = 2 grams of protein and 15 calories.

Don’t be fooled by the color of this veggie. Just because it’s white doesn’t mean its lacking nutrients. Where many fruits in vegetables are rich in vitamin A, C and Potassium, what makes mushrooms unique is they provide nutrients other fruits and veggies don’t typically offer.  Mushrooms are a great source of vitamin D supplying 114% of our recommended daily intake in just one serving (great for those who avoid dairy!). They are also rich in Copper (40% DV), Selenium (34%), Zinc (7%) and a variety of B vitamins too. Sauté in a little olive oil, salt and pepper and you have a great addition to any meal!

Asparagus: 5 spears = 2 grams of protein with 2 grams of fiber.

5 spears might not sound like much when it comes to asparagus, but even this small amount supplies 10% of the DV for Vitamin C along with small amounts of vitamin A, calcium and iron. Ever wonder why your urine is so fragrant after consuming asparagus? During digestion sulfurous amino acids in the vegetable are broken down resulting in its odor. Only 22-50% of the population can actually smell the pungent odor asparagus produces in the urine. Are you part of the lucky bunch?

Kale:  2 cups= 2 grams protein.

Kale definitely had its moment in the sun popping up in everything from shakes and smoothies to kale chips.  Nutritionally speaking in addition to its fermentable fiber and polyphenol content, kale has a lot to offer so it’s worthy of its praise. Just 2 cups contains 13% of the DV for Vitamin A, 16% vitamin C, 71% vitamin K, 15% calcium, 20% Manganese, and 6% Potassium.  Plus at 7% of the DV for fiber it helps keep you full and promotes good digestion too!

Broccoli 1 cup= 2 grams protein.

Broccoli is part of the cruciferous vegetable family, a group known for its cancer preventive properties.  It’s naturally low in calories and sodium and a good source of fiber in addition to being rich in vitamins, minerals, and phytochemicals.  For certain groups 1 cup of raw broccoli contains almost the full daily requirement for Vitamin C (90 % DV) and Vitamin K (77% DV) in addition to providing many other nutrients such as potassium, Vitamin A, and lutein which is great for eye health! 

Cauliflower: 1 cup= 2 grams protein. 

Another member of the cruciferous family cauliflower contains glucosinolates, sulfur-containing phytochemicals linked to their role in reducing the risk of certain types of cancer.  Just 1 cup supplies 8% of the DV for fiber, 57% of the DV of Vitamin C, B Vitamins and lots of minerals too.

Brussels sprouts: 1 cup= 3 grams protein.

Brussel Sprouts may be the highest in this bunch for their fiber content per cup at 3 grams or 12% of the daily value. Also a member of the cruciferous family, Brussel sprouts contain alpha-lipoic acid which has been shown to be beneficial in individuals with diabetes to help lower glucose levels, improve insulin sensitivity and prevent oxidative stress. Plus it’s rich in B-vitamins and clocks in at 130% of vitamin K, 83% Vitamin C, along with many minerals too.

Artichokes: 1 medium artichoke= 4 grams protein.

It also contains 7 grams of fiber or 25% of our recommended intake. In addition to healthy digestion and keeping us fuller longer, dietary Fiber has been shown to help support healthy blood cholesterol levels, lower the risk of heart disease and help promote good bacteria in the gut. Artichokes are also high in folate, which is important for woman of child bearing age, along with being a good source of numerous vitamins and minerals. Don’t have the time to cook, try using artichoke hearts instead which are a great addition to any salad or pasta dish!

Good Carbohydrates: These veggies get an OK rating by Dr. Sears’.  They are slightly higher on the protein to net carbohydrate ratio so should be consumed in smaller amounts although excellent sources of fermentable fiber. 

Garlic: 10 cloves 2 grams protein, 10 grams carbohydrate 
Onion: 1 cup 2 grams protein, 15 grams carbohydrate
Leeks: 1 cup chopped, 1 gram protein, 13 grams carbohydrate
Beets: 1 cup sliced, 1 gram protein, 13 grams carbohydrate

Satisfactory Carbohydrates:  The following list of vegetables and legumes meet Dr. Sears’s approval, but again caution should be taken since the protein to net carbohydrate content is a bit on the higher side.

Eggplant: 1 cup cubed <1 gram protein, 5 grams carbohydrate

Peppers: 1 cup chopped >1 gram protein, 7 grams carbohydrate

Tomato (not really a vegetable, but a fruit): 1 cup cherry tomatoes >1 gram protein, 6 grams carbohydrate

Beans: ¼ cup 3.5 grams protein, 10 grams carbohydrate

Lentils: ¼ cup 4 grams protein, 9 grams carbohydrate

What is considered a serving of vegetables?

When using vegetables with PastaRx, we use the same guidelines as the USDA for serving size. If you are eating fresh vegetables, a serving size is 1 cup (2 cups for leafy green vegetables).  For cooked vegetables, a serving size is considered to be ½ a cup (1 cup for leafy green vegetables).  For those who follow the Zone Diet and consume meat, poultry or fish, legumes would fall in the vegetable group, but we realize that for vegetarians, vegans, and individuals who rarely eat these foods, you may consider legumes as part of your protein requirements. In this case we would want to ensure you are consuming adequate amounts of vegetables in addition to this.

How much should you consume?

We suggest aiming to have 3-4 vegetables servings at each meal when using PastaRx as your protein source. The goal being to have 7-8 servings of vegetables per day. If following the classic Zone Diet you can use the block guide to help determine your needs here. 

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On the go? Click to download as PDF. 

Listing of Vegetables and their Ratio of Protein/Net Carb as an addition to PastaRx

Below is a list of vegetables and legumes for adding to Zone PastaRx.  Based on Dr. Sears' recommendations if the Protein/Net Carb ratio is greater than 0.79 it will help to enhance the hormonal response when using PastaRx as your protein source.

Note: The asterisks below denote vegetables naturally rich in either fructooligosaccharides (FOS) or glucooligosaccharides (GOS). These are considered prebiotics and a type of non-digestible carbohydrate. One asterisk signifies it is *rich in FOS and two means ** rich in GOS.

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062524---Keto-Blog

Ketogenic Diets and Aging

Chances are, you or someone you know has tried the keto diet at some point in time. This high-fat, very low-carbohydrate eating plan appeals to many due to its promise of rapid weight loss. In this blog, Dr. Sears explores some of the latest scientific findings on ketogenic diets and provides caution before hopping on this trend. What is a Ketogenic Diet? The ketogenic diet is a high-fat, very low-carbohydrate eating plan. This significant reduction in carbohydrates to induce a metabolic state is called ketosis. This only occurs when there is not enough carbohydrates in your liver to completely convert fatty acids to carbon dioxide and water. The normal conversion generates the chemical energy (ATP) that keeps us alive. In the absence of ketosis, each fatty acid generates 108 molecules of ATP when oxidized in the mitochondria. Ketone bodies make less ATP when they are metabolized by mitochondria. How much less? About five times less. This is like switching the gasoline in your car from high-octane fuel to low octane fuel as ketone bodies increase in the blood. Furthermore, contrary to popular belief, ketones are not an ideal energy source for the brain, as glucose remains the preferred fuel for ATP production in brain cells. Lack of blood glucose is a highly stressful situation for the brain. This is why the body secretes the stress hormone cortisol from the adrenal glands during ketosis to breakdown protein and convert the amino acids into glucose for the brain. This explains why even under complete starvation for 38 days, the blood glucose levels never dropped below 68 mg/dL. This is still considered as a normal blood sugar level. Where did this blood glucose come from if there was none in the diet for 38 days? The answer is neo-glucogenesis primarily using lean body mass. Ketogenic Diets Pros and Cons Interest in ketogenic diets rises and falls about every 20 years. They’re very low-carbohydrate diets that claim that carbohydrates make you fat and keep you fat. This is simply not true. It is not carbohydrates per se but a disrupted metabolism that makes you fat. To be more specific, it is the inhibition of AMPK, the master regulator of your metabolism that makes you fat. Why? As AMPK activity increases, you burn stored fat faster. Frankly, I’ve always been amazed by the re-emergence of ketogenic diets. Eighteen years ago, I published the premier clinical study demonstrating that, under equal calorie intake in which all the food was provided to the subjects for six weeks, the Zone Diet was better than a ketogenic diet in reducing total weight, excess body fat, and inflammation. Now, a recent study revealed some more very concerning findings about the long-term effects of ketogenic diets. This new study indicated that following a keto diet causes a rise in senescent cells, popularly known as “zombie cells.” Zombie Cells are damaged cells that no longer divide but don't die. That’s bad enough, but zombie cells continue spreading inflammation throughout the body. As the number of zombie cells increases in your body, they become a living nightmare. Why? Zombie cells accelerate aging because they cause the earlier development of many chronic diseases. In this study they found that zombie cells in the animals began to appear while they were on a ketogenic diet. The zombie cells then disappeared when researchers changed the diet to a “non-ketogenic diet” (i.e., the Zone diet). And when the animals were given a Keto diet again, the zombie cells reappeared. Notice a trend? If you want to hear more about this study you can listen to our recent podcast at Dr.Sears.com. Based on earlier blogs, this adds to the list of downsides for following a ketogenic diet versus the Zone Diet. PROS Rapid initial weight loss: This is primarily due to the loss of retained water from the glycogen stores in the liver, which is rapidly used up to maintain blood sugar levels. Since these glycogen stores in the liver contain significant levels of retained water, much of the initial weight loss is water rather than stored body fat. If your main goal is loss retained water, this can be seen as a benefit. Of course, going to a sauna would also work. Reduced hunger: Ketogenic diets are rich in protein. Any increase in protein intake can help reduce hunger. CONS Production of acetone: One of the ketone bodies produced during ketosis is acetone, which is also the main chemical in nail polish. Increased calcium loss: A ketogenic diet can lead to higher calcium loss from bones. Limited fat utilization: High levels of dietary fat reduce the likelihood of using stored body fat for energy unless you also significantly restrict calories. Reduced energy levels: The lack of ATP production on a ketogenic diet can lead to easier fatigue during mild exercise. Damage from cheat meals: After seven days on a keto diet, a single high-carb cheat meal can damage blood vessels. Lack of polyphenols: This makes it difficult to activate genes that optimize metabolism by improving mitochondrial efficiency in converting fat into ATP. No long-term weight loss advantage: Long-term studies show no difference in weight loss between a ketogenic diet and a low-fat, high-carb diet. No short-term metabolic advantage: Careful studies demonstrate that fat loss on a ketogenic diet is the same as on a low-fat, high-carb diet with the same caloric intake. Compromised gut health: A lack of fermentable fiber from carbohydrates can lead to poor gut health and an increased risk of developing a leaky gut, which can cause significant inflammation. Furthermore, short-chain fatty acids (SCFA) are the metabolic product of fermentable fiber. These SCFA are powerful epigenetic signaling agents that enhance gene transcription. Ketosis generates a different type of hydroxylated short fatty acid (3-hydroxyl butyrate, that has no effect on gene transcription. In addition, the lack of SCFA has significant negative consequences on the gut-brain axis. Cortisol build-up: To produce glucose for the brain, cortisol levels increase to breakdown protein to make sufficient glucose via neoglucogenesis. Excess cortisol can lead to insulin resistance that cause regain of some of initially loss body fat. In addition, increased cortisol levels cause a depressed immune system as well as destruction of memory cells in the hippocampus. The initial benefits of following the ketogenic diet result in some initial weight loss (primarily water weight rather than fat loss), long-term studies show no significant differences in overall weight loss. Now new findings show a ketogenic diet may lead to significant adverse health consequences by accelerating the formation of zombie cells. Call me crazy, but I feel the key to longevity and wellness comes down to better metabolic control instead of living in a constant state of ketosis. Following Metabolic Engineering® for a lifetime provides that pathway of losing body fat without ketosis. References 1. Johnston CS, Tjonn SL, Swan PD, White A, Hutchins H, and Sears B. “Ketogenic low-carbohydrate diets have no metabolic advantage over nonketogenic low-carbohydrate diets.” Am J Clin Nutr 2006 83:1055-61. 2. White AM, Johnston CS, Swan PD, Tjonn SL, and Sears B. “Blood ketones are directly related to fatigue and perceived effort during exercise in overweight adults adhering to low-carbohydrate diets for weight loss: a pilot study.” J Am Diet Assoc. 2007 107:1792-1796. 3. Sung-Jen Wei, Joseph R Schell, E Sandra Chocron, Mahboubeh Varmazyad, Guogang Xu, Wan Hsi Chen, Gloria M Martinez, Felix F Dong, Prethish Sreenivas, Rolando Trevino Jr , Haiyan Jiang, Yan Du, Afaf Saliba, Wei Qian, Brandon Lorenzana, Alia Nazarullah, Jenny Chang, Kumar Sharma, Erin Munkácsy, Nobuo Horikoshi, David Gius. Ketogenic diet induces p53-dependent cellular senescence in multiple organs. Sci Adv. 2024 May 17;10(20):eado1463. doi: 10.1126/sciadv.ado1463. 4. Owen OE, Felig P, Morgan AP, Wahren J, Cahill GF Jr. Liver and kidney metabolism during prolonged starvation. J Clin Invest. 1969 Mar;48(3):574-83. doi: 10.1172/JCI106016. 5. Chriett, S., Dąbek, A., Wojtala, M. et al. Prominent action of butyrate over β-hydroxybutyrate as histone deacetylase inhibitor, transcriptional modulator and anti-inflammatory molecule. Sci Rep 9, 742 (2019). https://doi.org/10.1038/s41598-018-36941-9. 6. Silva YP, Bernardi A, Frozza RL. The Role of Short-Chain Fatty Acids From Gut Microbiota in Gut-Brain Communication. Front Endocrinol (Lausanne). 2020 Jan 31;11:25. doi: 10.3389/fendo.2020.00025. 

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050824---Tofu-Blog

Tofu: Tips and Recipes Ideas

I have been eating tofu for a very long time, much longer than the 30 or so years I have been following the Zone Diet. Back then many of my favorite recipes came from the Tassajara cookbooks by Edward Espe Brown, the celebrated chef from the kitchen at California’s famous Zen Mountain Center, and cookbooks by Louise Hagler, a.k.a. Wendy Louise, a well-known authority on vegetarian cooking who is associated with a community in Tennessee known as The Farm. Those books are still among the best resources for tofu recipes. My mantra has always been if you don’t like something, don’t eat it. Keep this in mind if you’re new to tofu, start slowly by combining it with flavors and foods you like.    Tips and Suggestions    Firm-sprouted tofu is my preference for the Zone Diet. Unlike traditional tofu, which contains significant amounts of both protein and carbohydrate, sprouted has almost no carbohydrates. It’s lighter tasting, refreshing, and very filling.   Freezing tofu results in a chewy, sponge-like texture. I don’t recommend freezing, but some people prefer it when using tofu to substitute for meat in a recipe.    Baked tofu comes in a variety of flavors and makes an excellent quick meal with some vegetables and fruit added. It’s also great in salads.     Tofu made it into the book “The Top 100 Zone Foods” by Barry Sears.    Some recipes call for draining the tofu first. I find that usually isn’t necessary.   Tofu takes on the flavor of whatever is added to it.    Add nutritional yeast flakes to give a cheesy flavor to vegan tofu scrambles and dips. It’s also rich in protein and vitamin B12.   Cherry Vanilla Tofu “Ice Cream”   Tip: This doesn’t freeze or store well, so prepare only the amount you plan to serve immediately.   Using an immersion blender or a food processor blend equal parts of frozen dark cherries and firm tofu, plus some vanilla extract (preferably alcohol-free for best flavor). Serve immediately.  Tofu Scramble  This is great for breakfast, lunch, or dinner, and we’ve even brought it on long day hikes for a snack.   Crumble some firm tofu and stir in a generous amount of seasonings, taking care not to overdo it with the salt. Heat in a well-seasoned or nonstick skillet with a little Zone-friendly oil to the desired doneness.    Optional: If time allows, sauté some chopped onion in the skillet before adding the tofu and seasonings.    My favorite seasoning combination for this dish at my house is onion powder, garlic powder, turmeric, paprika, some oregano or thyme, nutritional yeast flakes, salt, and ground black pepper. The yellow color of the turmeric makes it somewhat like scrambled eggs.   Tofu Veggie Almond Pasta Salad   Dressing: Thin some smooth almond butter by stirring in some water, a little vinegar, and either soy sauce or Bragg’s Liquid Aminos (an unfermented soy sauce found in the health food section of most grocery stores).    Toss together cooked Dr. Sears’ Zone PastaRx Fusilli, tofu cut into cubes, matchstick cut red bell pepper, chopped green parts of scallions (a.k.a. green onions), and the almond butter dressing. Serve immediately or chill to serve later. It will keep well in the fridge for two or three days.   Use your imagination and see what you can come up with.  Experiment and have fun with it. Try using tofu to make cheesecakes, whipped desserts, tofu chocolate pudding, tofu “cream” based soups, tofu pot pie (think chicken pot pie), tofu burgers, tofu burritos, Buffalo tofu (like Buffalo wings), layered Mediterranean dips, tofu “meatballs”, grilled tofu, and more.    Enjoy! 

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