10 Best Supplements For The Keto Diet

Controversial or not, the ketogenic diet remains a popular way for people to lose weight, address chronic conditions, and potentially help with epilepsy without counting calories or giving up richer foods.

However, as with all restrictive diets, you run the risk of missing out on essential nutrients, like vitamin C, calcium, and folate.

That doesn’t mean a ketogenic diet can’t be beneficial, but you may want to consider supplementation as part of your weight-loss journey.

Here, you’ll learn about eight of the best ketogenic diet supplements that help boost energy and support weight loss, while filling in common nutrient gaps.

Why Take Vitamins For a Ketogenic Diet?

When done correctly, a ketogenic diet can provide a rich source of various nutrients, including B vitamins, healthy fats, vitamin E, vitamin A, iron, omega-3 fatty acids, and antioxidants.

However, as with any low-carb diet, the ketogenic diet does restrict many nutrient-rich foods, such as fruits, starchy vegetables, whole grains, beans, and legumes.

Although the body is adaptable, it can present various nutritional challenges to address with supplementation.

Additionally, the transition period from switching from your regular diet to a keto diet can produce various symptoms ranging from fatigue and brain fog to full-blown keto flu, which can include muscle aches, a low-grade fever, and general malaise.

Although the exact cause of keto flu isn’t fully understood, ensuring you’re getting enough nutrients will help make the transition easier and may even prevent or alleviate keto flu symptoms.

10 Best Supplements For a Ketogenic Diet

The best supplements to support a ketogenic diet focus on providing nutrients that may be missing from a high-fat, moderate-protein, and low-carb diet.

We’ve also included a couple of foundational supplements that can benefit anyone—whether they’re on a keto diet or not—as well as some that may help alleviate the symptoms of keto flu and improve exercise performance.

If ten supplements sounds like a lot, don’t worry, you can pick and choose based on your needs and health goals.

1. Digestive Enzymes

If you’re accustomed to eating higher-carb foods, transitioning to a high-fat diet can cause some digestive discomfort, such as feelings of fullness, bloating, or gas.

Digestive enzymes are a natural way to help ease digestive discomfort and promote regularity.

Just pop a couple about 15-30 minutes before meals, or as-needed for quick relief and easier digestion.

As your body adapts to a high-fat diet, you may not need them as often or at all. Listen to your body and adjust as needed.

Country Life has several digestive enzymes to choose from, including:

Full-Spectrum Maxi-Zyme®: A full-spectrum digestive enzyme that helps with the digestion of fats, carbohydrates, and proteins.
Tropical Papaya: A tasty papaya-based enzyme helpful for breaking down proteins and carbs.
Triple-Strength Bromelain: A papaya-based enzyme specific for breaking down proteins.
Betaine Hydrochloride: Provides a natural boost of hydrochloric acid with additional plant-based enzymes for optimal digestion of proteins, fats, and carbohydrates.

2. Calcium

Although some dairy is allowed on most types of keto diets, it’s not allowed or very limited on others due to the presence of sugars.

This may limit the amount of calcium you’re getting from your diet, especially if you’re not including non-dairy calcium sources such as dark leafy greens, canned salmon, and broccoli.

The calcium requirements for adults aged 19-50 are 1000 mg per day. Women over 50 and men over 70 should consume 1200 mg per day, while children and teens may be recommended up to 1300 mg per day.

If you’re unsure if you’re getting enough calcium while on keto, a supplement can help you meet those daily requirements.

Country Life offers several calcium supplements, including:

Note: If you have a history of kidney stones or coronary artery disease, a high-sodium diet, or are taking high-dose vitamin D or antacids, consult your healthcare practitioner before taking a calcium supplement.

3. Vitamin D

You can’t talk about calcium without vitamin D, the other essential nutrient for bone health.

Although a keto diet doesn’t necessarily deprive you of vitamin D, deficiency or insufficiency is common throughout the Western population.

Additionally, since many dairy products are fortified with vitamin D, supplementation may be beneficial.

Vitamin D is unique in that it is not abundant in foods (the sunshine is your best source), it’s a hormone, an antioxidant, and a vitamin, and it can act as a shield against aging due to its demonstrated abilities to shape cellular processes and fortify the immune system against infections and age-related diseases.

Additionally, it’s very affordable and generally considered safe to take.

If you haven’t yet, ask for a vitamin D serum test at your next checkup to determine the optimal dosage for you.

Most healthcare practitioners recommend vitamin D3 (cholecalciferol) as the most bioavailable form of vitamin D.

Shop Country Life’s Vitamin D supplements here.

4. Omega-3s

Some ketogenic diet foods, such as fatty fish, flax and chia seeds, and pastured meats, are good sources of omega-3 fatty acids.

However, when you’re consuming a high-fat diet, it can be easy for your omega-3 (anti-inflammatory) to omega-6 (pro-inflammatory) ratios to become imbalanced.

An imbalance in omega-3 to omega-6 fatty acids is associated with higher levels of inflammation, which can contribute to various adverse health effects on the cardiovascular system, joints, musculoskeletal system, immune system, metabolism, and more.

Plus, research suggests omega-3 supplementation promotes optimal metabolic function, cardiovascular health, and weight loss.

An optimal ratio of omega-3 to omega-6 fatty acids to support a normal inflammatory response is 1:1 to 4:1, and omega-3 supplements, such as fish oil, can help you achieve that.

Check out Country Life’s clean, contaminant-tested Omega-3 supplements (sourced from the lowest mercury fish, salmon, mackerel, anchovies, sardines, and herring (SMASH), including:

Learn more about the importance of these essential fatty acids: The Best Omega-3 Fatty Acid Supplement & Food Sources

5. Vitamin C

Vitamin C is an essential nutrient and antioxidant found abundantly in fruits and vegetables such as citrus, kiwi, strawberries, bell peppers, cantaloupe, and broccoli.

Adults need between 70-90 mg daily, although many people benefit from consuming more, especially for extra immune support, skin healing, and anti-aging benefits (vitamin C is essential for collagen production).

Vitamin C supplementation can be especially beneficial for those on a ketogenic diet who don't eat citrus fruits and/or don’t enjoy eating lots of bell peppers and broccoli.

Its beneficial effects on immunity may also help curb the side effects of keto flu, although this hasn’t been verified.

You can get supplemental vitamin C from a multivitamin or a vitamin C supplement in capsule, tablet, chewable, or powder form.

Some of Country Life’s popular vitamin C supplements include:

7. Magnesium

Magnesium has become the “it” mineral for promoting healthy sleep, reducing stress, building strong bones, supporting digestion, and maintaining hormonal balance.

Unfortunately, many of the richest food sources of magnesium, such as mangoes, whole grains, and legumes, are off-limits or restricted on a keto diet.

This makes magnesium supplementation a potential game-changer, especially if you’re also struggling with sleep, stress, or achy muscles and joints from keto flu or your new exercise regimen.

Although we typically recommend testing, not guessing, to determine optimal dosage, magnesium levels are difficult to test for because only about 1% of it is stored in the blood.

Therefore, optimal dosage is typically determined by a healthcare practitioner based on your diet and symptomology.

The recommended daily amount of magnesium for adults, age 19 and up, is between 310 and 420 mg. Magnesium needs are higher during pregnancy.

However, you may need more or less, depending on your diet, magnesium status, stress levels, medications you’re taking, and other factors.

Learn more about magnesium dosage, sources, and forms in: Magnesium Glycinate vs. Citrate: Which Form Is Best?

Shop Country Life Magnesium Supplements here.

8. The Best Multivitamin For a Ketogenic Diet

Multivitamins are an excellent supplement for a ketogenic diet, helping to fill nutrient gaps and promote healthy energy.

And if you do your research, you could find a multi with most of the nutrients commonly missing from a keto diet, such as vitamin C, calcium, magnesium, and vitamin D.

Country Life has several multivitamins that contain these nutrients, and others that can benefit you while on a ketogenic diet, including:

Core Daily-1 ® for Women Multivitamin: Contains all essential vitamins, including vitamins C, D, coenzymated B vitamins, calcium, iron, magnesium, probiotics, and digestive enzymes, plus a superfood blend designed for women.
Core Daily-1® Daily Multivitamin For Men: Contains all essential vitamins, including vitamins C, D, coenzymated B vitamins, calcium, magnesium, zinc, probiotics, and digestive enzymes, plus a superfood blend specifically for men.
RealFood Organics® Multivitamin For Women: A complete multivitamin for women made from natural food-based vitamins, minerals, nutrients, and superfoods to support female health.
RealFood Organics® Multivitamin For Men: A complete multivitamin for men made from whole-foods based vitamins, minerals, nutrients, and superfoods.
Daily Total One® Iron Free: An iron-free once-a-day multivitamin and multimineral complex, including Coenzyme B-Vitamins, vitamins C, D, calcium, magnesium, and potassium.

9. Creatine

Creatine supplements are trending in the health and fitness space due to their studied effects on muscle gain and preservation, exercise performance, and strength.

This makes it a natural addition to a ketogenic diet if weight loss and/or muscle gain are the goals.

Creatine is a natural, non-essential (made within the body) compound made from three amino acids: arginine, glycine, and methionine.

Creatine monohydrate is considered the purest and most-studied supplemental form of creatine.

Our sister company, Biochem, offers Creatine Monohydrate as part of their Sports Nutrition line.

Learn more in: The Benefits (And Drawbacks) Of Creatine For Women

10. Electrolytes

Many people swear by the benefits of electrolytes (electrically charged minerals such as potassium, sodium, and magnesium) and electrolyte powders for helping to reduce symptoms of the keto flu.

That’s because restricting carbohydrates can lead to a loss of water, which carries out vital minerals/electrolytes like sodium, potassium, and magnesium.

Electrolytes can also help promote hydration and faster workout recovery.

Although the link between consuming electrolytes and reducing keto flu symptoms hasn’t been proven, it’s generally safe to consume electrolytes while on a ketogenic diet, especially after working out.

However, if you have kidney disease, heart disease, or potassium issues, talk with your healthcare practitioner first.

There are various sources of electrolytes, including powders, supplements, and drinks, as well as natural sources such as bananas, coconut water, potatoes, green powders, leafy greens, and salt.

Your Best Ketogenic Diet Supplement List

Supplements can go a long way in helping you get the results you want from a ketogenic diet without sacrificing optimal nutrition.

Here’s a quick reference list with links to the best ketogenic diet supplements discussed in this article:

Digestive Enzymes

Creatine Monohydrate

All Country Life supplements are certified gluten-free by the Gluten-Free Certification Organization (GFCO), rigorously tested for contaminants, ethically sourced, IGEN non-GMO tested, Non-GMO Project verified, and manufactured in a certified organic and cGMP facility.

We’re also a Certified B Corp. This ensures you’re getting the highest-quality supplements, made with integrity and transparency, from a company that aligns with your health, environmental, and socially conscious lifestyle.

References Mentioned in This Article

“Calcium Fact Sheet for Health Professionals”. National Institutes Of Health Office Of Dietary Supplements.
“Vitamin D Deficiency”. [Updated 2025 Feb 15]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing.
“Vitamin D as a Shield against Aging”. Int J Mol Sci.
“A review of fatty acid profiles and antioxidant content in grass-fed and grain-fed beef”. Nutrition Journal.
“Omega-3 Polyunsaturated Fatty Acids: The Way Forward in Times of Mixed Evidence”. BioMed Research International.
“Omega-3 Fatty Acids”. The National Institute of Health Office of Dietary Supplements.
“Health implications of high dietary omega-6 polyunsaturated Fatty acids”. J Nutr Metab.
“Fish oil supplementation and insulin sensitivity: a systematic review and meta-analysis”. Lipids Health Dis.
“The effect of Omega-3 fatty acid supplementation on weight loss and cognitive function in overweight or obese individuals on weight-loss diet”. Nutr Hosp.
“Effects of Omega-3 supplementation on body weight and body fat mass: A systematic review”. Delpino, Felipe Mendes et al. Clinical Nutrition ESPEN, Volume 44, 122 - 129
“Effects of Omega-3 Fatty Acids on Immune Cells”. International Journal of Molecular Sciences.
“Vitamin C and Skin Health”. Oregon State University Linus Pauling Institute
Micronutrient Information Center.
“Vitamin C: A Comprehensive Review of Its Role in Health, Disease Prevention, and Therapeutic Potential”. Molecules.
“Vitamin C Fact Sheet for Consumers”. National Institute of Health Office of Dietary Supplements.
“Magnesium Basics,” Clinical Kidney Journal, Volume 5.
“Magnesium and Man: Implications for Health and Disease”. Physiological Reviews, Volume 96, Issue 1, Pages 1-46
“Magnesium”. Oregon State University. Linus Pauling Institute Micronutrient Information Center.
“Creatine supplementation nullifies the adverse effect of endurance exercise on the subsequent strength performance”. Rodrigo Vitasovic Gomes1 and Marcelo Saldanha Aoki1,2.
“Creatine Supplementation in Women's Health: A Lifespan Perspective”. Nutrients.
“Creatine Supplementation Beyond Athletics: Benefits of Different Types of Creatine for Women, Vegans, and Clinical Populations—A Narrative Review”. Nutrients.
“Very-low-carbohydrate diets and preservation of muscle mass”. Nutr Metab.
Symptoms during initiation of a ketogenic diet: A scoping review of occurrence rates, mechanisms and relief strategies. Frontiers in Nutrition.

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