6 Incredible Clean Carbs Sources That Build Muscle and Improve Performance


Carbohydrates are the primary fuel source for your brain, body, and overall athletic performance, but not all carbs are created equal. Clean carbohydrate sources, aka complex carbohydrates, provide the long-lasting, sustained energy you need for prolonged workouts, such as running, cycling, and high-intensity functional training. They also help you build more muscle and optimize workout recovery. The question is, what carbohydrates are best for building mass, optimizing body composition, and improving performance?

The Problem with Simple Carbs

Chances are you’ve had a snack or chugged a sugary carb drink before a workout or run and found yourself gassed-out midway through your training. Simple carbohydrates and supplements such as maltodextrin, dextrose, and cyclic dextrin spike your insulin, which can lead to low blood sugar, leaving you feeling fatigued and lethargic.

Most people, athletes included, will have some kind of simple carbs an hour or two before their training session to get that midday pick-me-up. This stokes a vicious cycle that we call the blood sugar roller coaster.

After you finish your pre-workout snack, your body is flooded with carbohydrates, resulting in a short boost of energy, followed by a devastating crash and burn. Your body releases the hormone insulin to regulate the amount of sugar, or glucose, in your bloodstream. Insulin sends the sugar out of your blood into the liver and muscle and stores it as body fat, resulting in low blood sugar, which translates to low energy.

As a result, you have mood swings, feel hungry all the time, and/or become fatigued and have low energy. Maintaining steady insulin and blood sugar levels depends on the type of carbohydrates you consume. When you hear that certain carbs are “high on the glycemic index,” it means that they will spike blood sugar and insulin more quickly than other types of carbohydrates.

You Need Complex Carbs

Complex carbs digest much more slowly than simple carbs, due to their longer-chain molecular structure. Complex carbs are also made of sugars, but they do not spike blood insulin; they keep your blood glucose stable and provide a sustained energy release. These types of carbohydrates work best for prolonged training, improving endurance, building more muscle, and optimizing body composition. Complex carbs slow the absorption of sugar, slowing digestion, which keeps you feeling fuller for longer. There’s no blood sugar roller coaster with complex carbs.

Sweet potatoes, white potatoes, bread, and oats.

What are the best clean carbs for building more muscle and performance?

1. Sweet Potatoes

Sweet potatoes have naturally occurring sugars and are full of dietary fiber and micronutrients. They are chock-full of vitamin B6, which can help maintain brain health, improving mood and energy levels. Sweet potatoes are also a great source of beta-carotene. Your body converts beta-carotene into vitamin A, which can help with immune health and eye health.

2. Yams

Nutritionally, yams resemble sweet potatoes. Both are low on the glycemic index, making them good choices for long-lasting, sustained energy without spiking blood sugar. Yams, however, have a higher vitamin C content than sweet potatoes but not nearly as much vitamin A.

3. Oats

Oats are an amazing source of complex carbohydrates and protein that can help build more muscle and optimize body composition. Oats are classified as a soluble fiber, which can help suppress appetite and slow digestion. Several studies have shown that oats can also protect against heart disease, reduce chronic inflammation, improve gut flora, help with inflammatory bowel disease, and provide sustained energy.[1-4]

4. Clean Carbs

Swolverine’s Clean Carbs is different from other carbohydrate supplements. Other products use maltodextrin, dextrose, and simple carbohydrates that spike blood sugar, creating more body fat and giving you an energy crash.[5] Clean Carbs is made with 100 percent natural whole foods from pure complex carbohydrates, including sweet potatoes, yams, and oats. Research indicates that your body burns rapidly through glycogen stores during high-intensity functional training, resistance training, and endurance workouts. Replacing glycogen after strenuous exercise is vital for optimal performance and faster recovery.[5]

5. Brown Rice

Brown rice is another great clean carb for mass building and weight management. Whether you’re shredding down or looking to increase size, brown rice is a great source of complex carbohydrates and will sustain a low insulin release for longer-lasting energy. Although similar, white rice is stripped of most of its nutrients and will trigger a blood sugar spike, as opposed to stable glucose levels.

Brown Rice

6. Quinoa

Quinoa is one of the only plant-based carbs that is considered a complete protein. With all the essential amino acids present, in addition to micronutrients such as manganese, magnesium, and iron, quinoa is a great clean carb source for athletes.

  1. Chappell, A. J., Simper, T., & Barker, M. E. (2018). Nutritional strategies of high level natural bodybuilders during competition preparation. Journal of the International Society of Sports Nutrition, 15(1), 4.
  2. Rebello, C.J., Johnson, W.D., Martin, C.K., Xie, W., O’Shea, M., Kurilich, A., Bordenave, N., Andler, S., Klinken, B.J.W.V., Chu, Y.F. and Greenway, F.L. (2013). Acute effect of oatmeal on subjective measures of appetite and satiety compared to a ready-to-eat breakfast cereal: a randomized crossover trial. Journal of the American College of Nutrition, 32(4), 272-9.
  3. Valeur, J., Puaschitz, N. G., Midtvedt, T., & Berstad, A. (2016). Oatmeal porridge: impact on microflora-associated characteristics in healthy subjects. British Journal of Nutrition, 115(1), 62-67.
  4. Rasane, P., Jha, A., Sabikhi, L., Kumar, A., & Unnikrishnan, V. S. (2015). Nutritional advantages of oats and opportunities for its processing as value added foods-a review. Journal of Food Science and Technology, 52(2), 662-675.
  5. Alghannam, A. F., Gonzalez, J. T., & Betts, J. A., (2018). Restoration of muscle glycogen and functional capacity: role of post-exercise carbohydrate and protein co-ingestion. Nutrients, 10(2), 253.


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Vitamin B12 Foods: The 10 Best Natural Sources that you need to be eating


Vitamin B12, also known as Cobalamin, is amongst the most complex and largest vitamins known to humans. It is essential for an active metabolism and proper functioning of the brain. Deficiency of the vitamin can lead to various health complications such as fatigue, depression, megaloblastic anaemia, brain damage, nerve damage, etc.

What makes Vitamin B12 different from other vitamins is the fact that it can only be produced by bacteria. Animal products are the most popular natural sources of the vitamin along with a few vegetarian options. There are loads of Vitamin B12 supplements available in the market to help people facing a deficiency but they should be consumed only after medical advice.

A lot of foods that are part of one’s daily diet naturally contain this nutritious vitamin. However, it is ideal to avoid processed or refined foods and concentrate more on natural and fresh foods.

Best natural sources of Vitamin B12


Seafood is one of the richest sources of Vitamin B12 and is a good addition to your diet if you are a non-vegetarian. Shellfish such as clams, oysters, mussels, and scallops offer an excellent source of the vital nutrients.

Dairy Products

Dairy products like low-fat milk, low-fat yogurt, or whole milk offer wholesome nutrition and have good quantities of Vitamin B12 in them. Try to avoid the high-fat dairy products as they may lead to obesity or other health problems.

glass of milk


Fish such as mackerel is not only delicious to taste, but is packed with Vitamin B12 too. There are other varieties of fish such as tuna, trout, and salmon that contain ample amounts of it as well.

Beef Liver

If you do eat beef, the liver is amongst the richest sources of Vitamin B12. It also contains good amounts of iron making it a very healthy option. That said, one should keep an eye out for the saturated fats present in the dish. Additionally, chicken liver pate and liverwurst spread are also good sources of this vitamin.


If you love crabs and tend to eat them every once in a while, then you are already consuming a good amount of the nutrient. Have them during lunch or dinner, as per your preference. There are other crustaceans rich in vitamin B12 such as Dungeness crab, blue crab, crayfish, and lobster.

plate with crabs rich in vitamin b12


There are plenty of fortified cereals available in the supermarket with added Vitamin B12 to them. Make sure that the variant you choose does not contain high amounts of sugar and is not highly refined. It is a better option for kids though, who generally do not enjoy other sources of the vitamin as much.

Silken Tofu

Fortified foods like silken tofu offer an excellent source of Vitamin B12 for vegetarians. It is one of a select few vegetarian options which is rich in this rare nutrient. Make sure it is a part of your daily diet to get your share of the vitamin. Alternatively, you can have a cup of fortified soy milk as well.


Chicken eggs are packed with nutrients and in addition to offering a hearty meal, they offer you significant amounts of Vitamin B12 and proteins as well.

chicken eggs

Red Meat

Adding generous quantities of red meat to your diet ensures you consume good amounts of the vitamin. Other red meats such as lamb shank and roasted buffalo are also rich in Vitamin B12.

Swiss Cheese

Swiss cheese consists of high quantities of Vitamin B12 as compared to other types of cheese. Apart from that, you can also opt for Mozzarella, cottage and feta cheese.

While you can use supplements for the required quantities of Vitamin B12, natural foods are always recommended. Just plan your meals in advance and make sure you get adequate quantities of the nutrient. Get in touch with a nutritionist to understand what Vitamin B12 rich foods you need to include in your diet.

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