1. Home Page
    2. /
  2. Health & Supplements
    3. /
  3. Vitamins Minerals & Supplements
    4. /
  4. Vitamin Supplements
    5. /
  5. Vitamin B Supplements
    6. /
  6. Vitamin B12 Supplements

Delivery

Delivery time may vary depending on store and country. To learn more about Shipping Policy

Price Range

CHF
-

Shop Imported Vitamin B12 Supplements from Global Brands Online in Switzerland

Sort by
|
Goli Apple Cider Vinegar Gummies - Worlds First ACV Gummy with Vitamin B12, Beetroot & Pomegranate - Vegan, Non-GMO, Gluten-Free
US Store
Goli

Goli Apple Cider Vinegar Gummies - Worlds First ACV Gummy with Vitamin B12, ...
4.4

10k+ bought

CHF 23

Goli Apple Cider Vinegar Gummies - Worlds First ACV Gummy with Vitamin B12, Beetroot & Pomegranate - Vegan, Non-GMO, Gluten-Free
US Store
Goli

Goli Apple Cider Vinegar Gummies - Worlds First ACV Gummy with Vitamin B12, ...
4.4

10k+ bought

CHF 23

18% OFF
Nature Made Extra Strength Vitamin B12 Gummies 3000 mcg per serving, B12 Vitamins for Energy Metabolism Support, 60 Gummy Vitamins, 30 Day Supply
US Store
Nature Made

Nature Made Extra Strength Vitamin B12 Gummies 3000 mcg per serving, B12 Vitamins ...
4.7

8k+ bought

CHF 18 22

Cerefolin Brain Wellness, Targeted Nutrition for Cognitive Support, Improves Memory, Focus & Concentration, L-Methylfolate, NAC, B12, Neurologist Recommended 30 Count
US Store
Cerefolin

Cerefolin Brain Wellness, Targeted Nutrition for Cognitive Support, Improves ...
4.3

5k+ bought

CHF 87

Solgar Vitamin B12 1000 mcg, 250 Nuggets - Supports Production of Energy, Red Blood Cells - Healthy Nervous System - Promotes Cardiovascular Health - Vitamin B - Non-GMO, Gluten Free - 250 Servings
US Store
Solgar

Solgar Vitamin B12 1000 mcg, 250 Nuggets - Supports Production of Energy, Red Blood ...
4.8

5k+ bought

CHF 32

NutraChamps Vitamin D3 & B12, Methyl B12 Gummies for Adults & Kids, Enhanced with Vitamin D 3 & B9 Vitamin Folate, Natural Energy, Mood, Metabolism & Focus, Raspberry, 60 Gummies
US Store
NutraChamps

NutraChamps Vitamin D3 & B12, Methyl B12 Gummies for Adults & Kids, Enhanced with ...
4.6

4k+ bought

CHF 24

Solgar Methylcobalamin Vitamin B12 5000 mcg, 60 Nuggets - Cherry Flavor - Supports Energy Metabolism - Body-Ready, Active Form - Non-GMO, Vegan, Gluten Free - 60 Servings
US Store
Solgar

Solgar Methylcobalamin Vitamin B12 5000 mcg, 60 Nuggets - Cherry Flavor - Supports ...
4.6

3k+ bought

CHF 26

BioActive Vitamin B12 - 5000 mcg, Contains 3 BioActive Forms Methylfolate Cofactor - Methyl B12, Adenosyl B12 & Hydroxy B12 | Supports Energy, Metabolism & Mood | Vegan, Non-GMO 60 Servings
US Store
Triquetra Health

BioActive Vitamin B12 - 5000 mcg, Contains 3 BioActive Forms Methylfolate Cofactor ...
4.5

3k+ bought

CHF 32

Black Girl Vitamins - Vitamin B12 Gummies, for Energy, Metabolism & Nervous System Support, 1000 mcg Cyancobalamin B12 per Serving, Halal & Gluten-Free - 60ct
US Store
Black Girl Vitamins

Black Girl Vitamins - Vitamin B12 Gummies, for Energy, Metabolism & Nervous System ...
4.7

3k+ bought

CHF 30

39% OFF
Nature Made Zero Sugar Energy Vitamin B12 Gummies 1000 mcg per Serving, B12 Vitamin, Energy Metabolism Support, Aspartame Free, 110 Sugar Free Gummies, 55 Day Supply
US Store
Nature Made

Nature Made Zero Sugar Energy Vitamin B12 Gummies 1000 mcg per Serving, B12 ...
4.6

3k+ bought

CHF 17 28

17% OFF
Kind Patches Energy Patches - Vegan, Latex Free - 30 Count
US Store
Kind Patches

Kind Patches Energy Patches - Vegan, Latex Free - 30 Count
4

1k+ bought

CHF 19 23

Vitamatic Extra Strength Vitamin B12 5000 mcg Methyl B12 Gummies - 120 Count - Energy Metabolism Support and Nervous System Health Support, Natural Cherry Flavored 1
US Store
Vitamatic

Vitamatic Extra Strength Vitamin B12 5000 mcg Methyl B12 Gummies - 120 Count - ...
4.6

1k+ bought

CHF 23

Doctors Best Fully Active B12 1500 mcg, Non-GMO, Vegan, Gluten Free, Supports Healthy Memory, Mood and Circulation, 60 Count
US Store
Doctor's BEST

Doctors Best Fully Active B12 1500 mcg, Non-GMO, Vegan, Gluten Free, Supports ...
4.7

800+ bought

CHF 16

10% OFF
Lunakai USA Made Vitamin B12 Gummies 3000mcg, B12 Vitamins for Energy, Brain & Metabolism Support, Methylcobalamin for Adults, Women & Men, Non-GMO Vegan, 60 Daily Gummy Vitamins
US Store
Lunakai

Lunakai USA Made Vitamin B12 Gummies 3000mcg, B12 Vitamins for Energy, Brain & ...
4.4

800+ bought

CHF 36 40

22% OFF
Lifeable Vitamin B12 for Kids | 1000 mcg | Great Tasting Vitamin B12 Gummies | Gluten Free, Vegan B12 Vitamins | B12 Vitamins for Energy, Mood and Nervous System Support | 90 Gummies
US Store
Lifeable

Lifeable Vitamin B12 for Kids | 1000 mcg | Great Tasting Vitamin B12 Gummies | ...
4.7

600+ bought

CHF 21 27

19% OFF
Natures Bounty Vitamin B-12 500 Mcg, 100 Count
US Store
Nature's Bounty

Natures Bounty Vitamin B-12 500 Mcg, 100 Count
4.7

500+ bought

CHF 13 16

NOW Foods B-12 10,000mcg Shots 0.5 ounce 12 Count Box Mixed Berry
US Store
NOW Foods

NOW Foods B-12 10,000mcg Shots 0.5 ounce 12 Count Box Mixed Berry
4.4

400+ bought

CHF 26

Seeking Health Methyl B12 1000, 1000 mcg B12 as Adenosylcobalamin and Methylcobalamin, Supports Homocysteine Levels and Methylation, MTHFR Support, Vegan and Vegetarian 60 lozenges*
US Store
Seeking Health

Seeking Health Methyl B12 1000, 1000 mcg B12 as Adenosylcobalamin and ...
4.7

400+ bought

CHF 29

Seeking Health Methyl B12 5000, 5000 mcg B12 as Adenosylcobalamin and Methylcobalamin, Potent Formula Supports Healthy Metabolism, Methylation, Cognitive Health, Vegan and Vegetarian 60 lozenges*
US Store
Seeking Health

Seeking Health Methyl B12 5000, 5000 mcg B12 as Adenosylcobalamin and ...
4.7

300+ bought

CHF 40

12% OFF
Lifeable Vitamin B12 Gummies for Adults | 1000 mcg | Great Tasting B12 Vitamins | Non-GMO, Vegan B12 | for Energy and Metabolism Support | 90 Gummies
US Store
Lifeable

Lifeable Vitamin B12 Gummies for Adults | 1000 mcg | Great Tasting B12 Vitamins | ...
4.6

300+ bought

CHF 22 25

KAL Vitamin B12 Methylcobalamin 1000mcg, Healthy Energy, Metabolism, Nerve and Red Blood Cell Support, Fast Dissolve ActivMelt, High Absorption, Vegetarian, Natural Raspberry, 120 Serv, 120 Micro Tabs
US Store
KAL

KAL Vitamin B12 Methylcobalamin 1000mcg, Healthy Energy, Metabolism, Nerve and Red ...
4.7

200+ bought

CHF 25

Nordic Naturals Zero Sugar Vitamin B12 Gummies - 2000 mcg Vitamin B12 per Gummy, Passion Fruit Guava Flavor - 30 Gummies, Essential Nutrient Support for Energy Production and Brain Health, 30 Servings
US Store
Nordic Naturals

Nordic Naturals Zero Sugar Vitamin B12 Gummies - 2000 mcg Vitamin B12 per Gummy, ...
4

200+ bought

CHF 25

Veru Wellness B12 Energy Patch, Natural Patch B12, Garcinia - Self Adhesive Time Release Patch, 60 Patches 60 Days
US Store
Veru Wellness

Veru Wellness B12 Energy Patch, Natural Patch B12, Garcinia - Self Adhesive Time ...
3.8

200+ bought

CHF 28

5% OFF
Solgar Sublingual Vitamin B12 1000 mcg - 100 Nuggets - Non-GMO, Vegan, Gluten Free, Dairy Free, Kosher, Halal - 100 Servings
US Store
Solgar

Solgar Sublingual Vitamin B12 1000 mcg - 100 Nuggets - Non-GMO, Vegan, Gluten Free, ...
4.7

200+ bought

CHF 19 20

Solgar Methylcobalamin Vitamin B12 1000 mcg - 60 Nuggets, Pack of 2 - Supports Energy Metabolism - Non-GMO, Vegan, Gluten Free, Dairy Free, Kosher - 120 Total Servings
US Store
Solgar

Solgar Methylcobalamin Vitamin B12 1000 mcg - 60 Nuggets, Pack of 2 - Supports ...
4.7

200+ bought

CHF 54

NatureWise Vitamin B12 Methylcobalamin - Active Form for Ultra Absorption - 1000mcg Methylated B12 for Energy, Nerve & Heart Support - Non-GMO, Vegan, USA Manufactured - 60 Capsules[60-Day Supply]
US Store
NatureWise

NatureWise Vitamin B12 Methylcobalamin - Active Form for Ultra Absorption - 1000mcg ...
4.5

200+ bought

CHF 17

Vitamin B-12 500mcg Solgar 100 Tabs
US Store
Solgar

Vitamin B-12 500mcg Solgar 100 Tabs
4.7

200+ bought

CHF 19

Solgar Methyl B12 Gummies for Adults 1,500mcg Ultra Potency Vitamin for Energy & Metabolism Support, Raspberry Flavor, Vegan & Gluten-Free Gummy for Women & Men, 2 Month Supply, 60 Servings, 2g Sugar
US Store
Solgar

Solgar Methyl B12 Gummies for Adults 1,500mcg Ultra Potency Vitamin for Energy & ...
4.6

200+ bought

CHF 23

Veru Wellness B12 Energy Patch, Natural Patch B12, Garcinia - Self Adhesive Time Release Patch, 60 Patches 60 Days
US Store
Veru Wellness

Veru Wellness B12 Energy Patch, Natural Patch B12, Garcinia - Self Adhesive Time ...
3.8

200+ bought

CHF 28

Extracto De Malta Con Hemoglobina Y B-12vitaglobina B-12
US Store
NaturePlus

Extracto De Malta Con Hemoglobina Y B-12vitaglobina B-12
4.7

200+ bought

CHF 21

Vitamin B-12 TABS 250 MCG WMILL Size 100
US Store
Windmill

Vitamin B-12 TABS 250 MCG WMILL Size 100
4.5

100+ bought

CHF 17

NAT B Vitamin B-12 TB 100MCG 100
US Store
Nature's Blend

NAT B Vitamin B-12 TB 100MCG 100
4.7

100+ bought

CHF 14

7% OFF
Vitamin B12 5000 Sublingual, 0.02 Pound
US Store
SIGFORM

Vitamin B12 5000 Sublingual, 0.02 Pound
4.6

100+ bought

CHF 25 27

Vitamin D3 B12 Gummies, Vitamin B12 & Vitamin D 10000IU for Women Men | B12 Vitamins with Vitamin K2, Calcium, Magnesium, Sugar Free, Vegan
US Store
WEEVIT

Vitamin D3 B12 Gummies, Vitamin B12 & Vitamin D 10000IU for Women Men | B12 ...
4.3

100+ bought

CHF 42

Methylated B12 Gummies 5000mcg/10000mcg & L-Methylfolate 400mcg + Iron 18mg, B6, D3 for Women Men - Methyl B12 Vitamin with Folate for Energy, MTHFR Gene, Methylation for Adults, Sugar free, 2 Pack
US Store
NEVISS

Methylated B12 Gummies 5000mcg/10000mcg & L-Methylfolate 400mcg + Iron 18mg, B6, D3 ...
4.6

100+ bought

CHF 46

Vitamatic Extra Strength Vitamin B12 5000 mcg Methyl B12 Gummies - 240 Count, Natural Cherry Flavored
US Store
Vitamatic

Vitamatic Extra Strength Vitamin B12 5000 mcg Methyl B12 Gummies - 240 Count, ...
4.5

100+ bought

CHF 35

Vitafusion B-12 1000mcg 140 Count Pack of 2
US Store
Vitafusion

Vitafusion B-12 1000mcg 140 Count Pack of 2
4.7

100+ bought

CHF 38

Sublingual Products B-Total Twin Pack - 2 fl oz
US Store
B Total

Sublingual Products B-Total Twin Pack - 2 fl oz
4.8

100+ bought

CHF 24

PatchAid B12 Energy Plus Topical Patch 30-Day Supply Pack of 2
US Store
Patch Aid

PatchAid B12 Energy Plus Topical Patch 30-Day Supply Pack of 2
4.3

100+ bought

CHF 52

Zaytun Halal Vitamin B12 1000mcg, Promotes Energy Production, Metabolism and Healthy Nervous System - Vegetarians and Vegans Formula - Dairy-Free - 4 Months Supply - Made in USA
US Store
Zaytun Vitamins

Zaytun Halal Vitamin B12 1000mcg, Promotes Energy Production, Metabolism and ...
4.6

100+ bought

CHF 23

Natures Bounty, Super Strength B-12, 5000mcg, 2 Oz Pack of 2
US Store
Nature's Bounty

Natures Bounty, Super Strength B-12, 5000mcg, 2 Oz Pack of 2
4.7

100+ bought

CHF 34

BioActive Vitamin B12 1000 mcg | Contains 3 BioActive Forms B12 Plus Methylfolate Cofactor - Methyl B12, Adenosyl B12 & Hydroxy B12 | Sublingual Form, Cherry Flavor, Organic, Vegan 180 Servings
US Store
Triquetra Health

BioActive Vitamin B12 1000 mcg | Contains 3 BioActive Forms B12 Plus Methylfolate ...
4.5

100+ bought

CHF 31

Vita Sciences Vitamin B12 Patch - Extra Strength Formula for Men and Women, 1 Month Supply. Boost Energy, Focus, Memory & Metabolism
US Store
Vita Sciences

Vita Sciences Vitamin B12 Patch - Extra Strength Formula for Men and Women, 1 Month ...
3.8

100+ bought

CHF 32

B12 Patch for Energy Plus 75 Count Pack - B12 Patches B12 with Methylcobalamin & Guarana
US Store
VitaPatch

B12 Patch for Energy Plus 75 Count Pack - B12 Patches B12 with Methylcobalamin & ...
4.1

100+ bought

CHF 24

Lifeable Sugar Free Vitamin B12 Gummies | 1000 mcg | Great Tasting B12 Vitamins Gummies | Energy, Mood, and Metabolism Support | B 12 Vitamin Gummies for Men, Women, Adults | 90 Gummies
US Store
Lifeable

Lifeable Sugar Free Vitamin B12 Gummies | 1000 mcg | Great Tasting B12 Vitamins ...
4.4

100+ bought

CHF 29

Lifeable Sugar Free Kids Vitamin B12 Gummies | 1000 mcg | Great Tasting B12 Vitamins for Kids | Energy, Mood, and Metabolism Support | B 12 Vitamin Gummies for Boys and Girls | 90 Gummies
US Store
Lifeable

Lifeable Sugar Free Kids Vitamin B12 Gummies | 1000 mcg | Great Tasting B12 ...
4.7

100+ bought

CHF 26

10% OFF
Lunakai USA Made Vitamin B12 Gummies for Adults 50+, Non-GMO B12 for Energy & Vitality Boost, Delicious Citrus Flavor, 60ct
US Store
Lunakai

Lunakai USA Made Vitamin B12 Gummies for Adults 50+, Non-GMO B12 for Energy & ...
4

100+ bought

CHF 36 40

Solgar Methylcobalamin 1000 mcg, 60 Nuggets
US Store
Solgar

Solgar Methylcobalamin 1000 mcg, 60 Nuggets
4.6

100+ bought

CHF 23

Shop Vitamin B12 Supplements for Energy & Wellness from Ubuy Switzerland

Feeling a bit sluggish lately? That "mid-afternoon slump" might be more than just a lack of coffee. Often called the "Energy Vitamin," Vitamin B12 is the unsung hero of your metabolism and nervous system. Whether you are navigating the fast-paced lifestyle or looking to optimise your fitness routine, finding the right Vitamin B12 supplements can make a world of difference. At Ubuy Switzerland, we bring you a curated selection of premium supplements from global brands to help you reclaim your vitality.

Why Does Your Body Crave Vitamin B12?

Vitamin B12 is a water-soluble nutrient essential for nerve tissue health, brain function, and the production of red blood cells. Unlike some nutrients your body can produce on its own, B12 must come from your diet or supplements. While it is naturally found in animal products, people who consume plant-based diets or with certain digestive conditions, find it difficult to maintain optimal levels.

When you shop for vitamin B12 online here, you aren’t just buying a bottle of pills; you are investing in cognitive clarity and physical endurance. From supporting DNA synthesis to keeping your homocysteine levels in check for heart health, this vitamin does the heavy lifting behind the scenes.

Explore Different Variety in Vitamin B12

The world of Vitamin B12 offers a diverse range of options to suit every health goal. It is far from a one-size-fits-all nutrient. Different formats cater to unique absorption needs and lifestyle preferences. You can pick from active coenzymes that the body uses immediately. Others prefer steady-release formulas for long-lasting metabolic support. Whether you need a quick-dissolving tablet or a customisable liquid, there is a perfect match for your routine. Exploring these varieties is the first step toward personalised wellness. Selecting the right form ensures your body gets the exact support it requires for energy and focus.

Vitamin B12 Methylcobalamin

When browsing the best Vitamin B12 Supplements category, you will frequently encounter Vitamin B12 Methylcobalamin. This is the naturally occurring, coenzyme form of the vitamin, often favoured by health enthusiasts for its superior bioavailability. It is highly bioactive, meaning your body doesn’t have to work as hard to convert it. It is often the preferred choice for those looking to support brain health and sleep cycles. Here, we offer a diverse range of methylcobalamin based supplements, from high-potency vitamin B12 sublingual to vegan-friendly capsules.

Vitamin B12 Complex

Sometimes, B12 works best when it has its "friends" around. A vitamin B12 complex usually includes other B vitamins like B6 and Folic Acid. This combination is fantastic for metabolic support and ensuring that your nervous system operates like a well-oiled machine. It’s a holistic way to tackle fatigue. It is an excellent option for those who want to cover all their nutritional bases in one go rather than taking multiple individual pills. Our selection of B-complex supplements is made to help you maintain steady energy levels throughout the day without the crash.

Vitamin B12 Capsules and Tablets

For those who prefer a traditional routine, vitamin B12 capsules are a convenient, mess-free option. They are easy to incorporate into your morning supplement stack. If you are looking for high potency, a vitamin B12 1000 mg dose is a common standard for correcting deficiencies quickly and effectively. Many of the Vitamin B12 Tablets available here are made for "timed release," meaning the vitamin is gradually absorbed by your body throughout the day rather than all at once.

Liquid and Sublingual

If swallowing large pills isn't your favourite activity, we have good news. Modern science has given us more palatable ways to get your daily dose. Vitamin B12 Liquid is perfect for customised dosing. Now you can easily add B12 liquid to your morning smoothie or take it directly. It usually gets absorbed faster than traditional tablets. The vitamin B12 sublingual is made to dissolve under your tongue and let the nutrient enter your bloodstream directly through the mucosal membranes. 

Top TrustedBrands at Ubuy Switzerland

Quality is non-negotiable when it comes to what you put in your body. We have meticulously vetted our inventory to include the best vitamin B12 tablets brands from the international market. Whether you are looking for clinical precision or everyday reliability, they represent the gold standard in the vitamins & minerals supplements.

Nature Made

As a cornerstone of health & supplements. Nature Made has earned its reputation through decades of transparency. They are a go-to for those who value third-party verification, as many of their products are USP-verified. When you choose Nature Made from our vitamin B supplement collection, you are getting a product tested for purity and potency. Their B12 tablets are crafted to support cellular energy production, making them a reliable staple for anyone’s daily wellness regimen.

Reddit user experience with the brand:

I’m a dietitian and this is what I take. Very safe and reputable. Due this weekend, baby is doing great.

I’ve actually been taking this prenatal (without the choline pre-pregnancy) since I was 20, and I’m 36 now. Perfect bill of health.

Vitamin A is a concern if in excess as it’s a fat soluble vitamin, unlike most water soluble vitamins and minerals we easily pee out in high doses. Vitamin A at this dose is safe (59% of daily value).

Source: u/thisisrealgoodtea

Nature’s Bounty

If you are just starting your journey into Vitamin B Supplements, Nature’s Bounty offers the perfect entry point. Known for their incredible variety, they provide everything from quick-dissolve tablets to high-potency coatings. Within the health & supplements landscape, they are celebrated for making nutrition accessible without compromising on quality. Their B12 range is designed to fit seamlessly into diverse lifestyles, helping you tackle your day with a much-needed metabolic boost.

Integrative Therapeutics

Integrative Therapeutics is a name that resonates with healthcare professionals who prioritise evidence-based wellness. It is frequently recommended by healthcare professionals because of its focus on "integrative" medicine—combining the best of science and nature. The B12 formulations are often more specialised, focusing on high bioavailability to ensure your nervous system gets the exact support it needs. They often offer chewable tablets that dissolve quickly, allowing for efficient absorption that skips the often-lengthy digestive process.

Klean Athlete

Klean Athlete is a premier choice in our vitamin supplements category since every product is NSF Certified for Sport. This means their B12 supplements are rigorously tested to be free from banned substances, offering athletes with peace of mind. It’s the best vitamin B12 tablets brand for those who push their physical limits and demand nothing but the purest ingredients.Their B-complex and B12 formulations are designed to support muscle restoration and steady energy metabolism, helping you push through the daily rigours of intense training. When you choose Klean Athlete, you are selecting a brand specifically engineered for those who demand the most from their sport and their nutrition.

Douglas Labs

When you step into the world of health & supplements, few names command as much respect from medical professionals as Douglas Labs. With a legacy spanning over 65 years, they have solidified their position at the pinnacle of the vitamins minerals & supplements industry. Douglas Labs is where science meets peak performance. The brand specialises in professional-strength formulas. Their vitamin B12 products are often highly concentrated and backed by extensive research, making them ideal for individuals with significant nutritional gaps. If you are looking for science-led vitamin B supplements that prioritise long-term health outcomes and systemic support, Douglas Labs is the brand to trust.

Frequently Asked Questions About Vitamin B12 Supplements in Switzerland

  • What is the recommended dosage for Vitamin B12 supplements?

    Determining the right dosage for Vitamin B12 depends entirely on your current health status, age, and why you are taking the supplement. For most healthy adults, the Recommended Dietary Allowance (RDA) is approximately 2.4 mcg per day. However, it is always best to consult with a healthcare provider to find the dose that fits your specific blood levels.

  • How do I choose the right Vitamin B12 supplement for my needs?

    Consider your absorption capability. If you have digestive issues, a vitamin b12 sublingual or b12 liquid might be better than a capsule. Also, decide between Methylcobalamin and Cyanocobalamin based on your preference for bioavailability.

  • What are the benefits of taking Vitamin B12 supplements daily?

    Daily intake can lead to improved energy levels, better mood regulation, and enhanced cognitive function. It also plays a key role in maintaining healthy hair, skin, and nails by assisting in cell reproduction.

  • Who should consider taking Vitamin B12 supplements?

    Vegetarians and vegans are at the highest risk of deficiency since B12 is primarily found in meat and dairy. Experts often recommend that older adults get most of their B12 from supplements or fortified foods, as these forms are easier for the body to process.

  • What are Vitamin B12 supplements and why are they important?

    Vitamin B12 supplements are concentrated forms of cobalamin used to ensure the body has enough of this essential nutrient. They are vital because B12 helps maintain the health of your metabolism, blood cells, and nerves. Without it, you may experience chronic fatigue and neurological "fog."