Many common drinks contain B vitamins, from orange juice and milk to kombucha and energy drinks. The B vitamin family includes eight different nutrients, and no single beverage delivers all of them in meaningful amounts. Knowing which drinks carry which B vitamins helps you fill gaps in your diet or avoid overdoing it with heavily fortified products.
The Eight B Vitamins at a Glance
B vitamins are water-soluble, meaning your body doesn’t store them well and needs a regular supply. The group includes B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6, B7 (biotin), B9 (folate), and B12. Adults need 2.4 mcg of B12 per day, for example, while folate requirements sit at 400 mcg. Each B vitamin plays a different role in energy metabolism, nerve function, and red blood cell production.
Some drinks are natural sources, others are fortified during manufacturing, and a few produce B vitamins through fermentation. Here’s what you’ll find in each category.
Milk and Dairy-Based Drinks
Cow’s milk is one of the most reliable natural sources of several B vitamins in a single glass. An 8-ounce serving delivers meaningful amounts of B2, B12, and B5, along with smaller amounts of B1 and B6. Whole, reduced-fat, and skim milk all contain similar B vitamin levels because these nutrients are in the water-soluble portion, not the fat.
Yogurt-based drinks and kefir follow a similar profile, with the added benefit that fermentation can slightly increase certain B vitamins. Kefir in particular tends to be a strong source of B12 and B2. If you’re lactose intolerant, many plant-based milks (oat, soy, almond) are fortified with B12 and B2 to match dairy’s profile, though the amounts vary by brand, so checking the label matters.
Orange Juice and Other Fruit Juices
Orange juice is best known for vitamin C, but it also delivers folate (B9). One cup of orange juice provides about 47 mcg of folate, roughly 12% of an adult’s daily requirement. Tomato juice is similar, with about 49 mcg of folate per cup. These aren’t blockbuster numbers, but they add up as part of a varied diet.
Beyond folate, most fruit juices are modest B vitamin sources at best. Some brands fortify their juices with additional B vitamins, particularly B6 and B12, so a fortified orange juice can deliver considerably more than its natural counterpart. The nutrition label will list added vitamins separately if they’ve been included.
Energy Drinks
Energy drinks are among the most concentrated sources of B vitamins you’ll find in any beverage, though “more” isn’t necessarily better. A study analyzing 55 energy drink products found that the average product contained about 165% of the daily value for B6 and a staggering 1,151% of the daily value for B12. Some individual products delivered far more than those averages.
These extreme levels exist because manufacturers add B vitamins to support marketing claims about energy and metabolism. Your body excretes most of the excess B12 through urine since it’s water-soluble. B6 is a different story. The tolerable upper intake level for B6 is 100 mg per day for adults, and regularly exceeding it can cause nerve damage. Clinical case reports have linked heavy energy drink consumption to tingling, numbness, and leg jerking caused by B6 toxicity. If you drink energy drinks daily or combine them with multivitamins or fortified foods, the cumulative B6 intake can creep into problematic territory.
Kombucha
Kombucha produces B vitamins naturally during fermentation. The symbiotic colony of bacteria and yeast (SCOBY) generates B1, B2, B3, B6, B12, and folate as byproducts of breaking down sugar and tea. B3 in particular increases during the fermentation process.
The catch is that concentrations vary widely depending on the tea used, fermentation time, temperature, and the specific microbial culture. Commercial kombucha products don’t typically list B vitamin content on the label in precise amounts, and most are not considered a reliable way to meet your daily requirements. Think of kombucha as a contributor rather than a primary source.
Yeast-Based Drinks and Broths
Yeast extract is packed with B vitamins. Products like Marmite and Vegemite, which can be dissolved in hot water to make a savory drink, contain notable levels of B1, B2, B3, B5, B6, B7, B9, and B12. Nutritional yeast-based products are especially popular among vegans because they offer one of the few non-animal sources of B12, though the B12 in most nutritional yeast is added through fortification rather than produced naturally.
Bone broth and beef broth contain some B vitamins that leach from bones and connective tissue during cooking, particularly B12 and niacin. The amounts depend on cooking time and the ingredients used, so homemade and commercial versions differ significantly. Broth is a reasonable supplemental source but generally falls short of dairy or fortified options for total B vitamin content.
Fortified Plant Milks and Smoothies
Soy milk, oat milk, almond milk, and other plant-based alternatives are routinely fortified with B12, B2, and sometimes B6. A typical fortified soy milk provides around 1.2 mcg of B12 per cup, which is half the daily recommendation. This makes fortified plant milks one of the most practical B12 sources for people who don’t consume animal products.
Green smoothies made with spinach, kale, or other leafy greens are natural sources of folate. Blending a cup of raw spinach into a smoothie adds roughly 60 mcg of folate. Adding banana contributes B6, and including fortified plant milk as the liquid base layers on B12. A well-constructed smoothie can touch four or five different B vitamins in a single glass.
Beer and Other Fermented Alcohol
Unfiltered beer contains B vitamins from brewer’s yeast, including B6, B12, folate, and niacin. Filtered and pasteurized commercial beers retain less because processing removes yeast and heat degrades some vitamins. A standard 12-ounce beer typically provides small amounts of B6 and folate, but not enough to be nutritionally significant. Alcohol also impairs B vitamin absorption, particularly folate and B12, so beer is a poor strategy for meeting your B vitamin needs despite technically containing them.
Which Drinks Deliver Which B Vitamins
- B1 (thiamine): Kombucha, yeast extract drinks, fortified plant milks
- B2 (riboflavin): Cow’s milk, kefir, fortified plant milks, kombucha
- B3 (niacin): Kombucha, yeast extract drinks, energy drinks
- B5 (pantothenic acid): Milk, yeast extract drinks
- B6: Energy drinks, fortified juices, kombucha, smoothies with banana
- B7 (biotin): Yeast extract drinks
- B9 (folate): Orange juice, tomato juice, green smoothies, kombucha
- B12: Milk, kefir, fortified plant milks, energy drinks, yeast extract drinks
Watching Your Intake From Fortified Drinks
Most people eating a varied diet get enough B vitamins without thinking about it. The real risk with B vitamins in drinks isn’t deficiency but overconsumption from fortified products. Energy drinks are the main concern. Stacking an energy drink (at 165% or more of your daily B6) with a multivitamin and fortified cereal can push your B6 intake well above safe levels over time. Symptoms of B6 excess include tingling or numbness in the hands and feet, difficulty walking, and muscle weakness. In one clinical case, a patient developed neuropathy symptoms linked specifically to energy drink and supplement use combined.
B12, by contrast, has no established upper limit because excess is efficiently cleared by the kidneys. The same is true for most other B vitamins, with the exception of B3 (niacin), which can cause flushing and liver problems at very high supplemental doses. If you’re relying on a single fortified beverage per day alongside a normal diet, you’re unlikely to run into trouble. Problems emerge with daily stacking of multiple fortified products.