Most drinks that contain vitamin D get it through fortification, not naturally. Cow’s milk is the most common source, delivering about 100 IU per 8-ounce glass, which covers roughly 15% of the 600 IU most adults need daily. Beyond milk, several other beverages are fortified to similar or even higher levels, giving you practical options whether you drink dairy or not.
Cow’s Milk
Fortified cow’s milk is the single most widely consumed source of vitamin D in liquid form. The FDA requires that fortified milk contain 400 to 600 IU per quart, which works out to about 100 to 150 IU in a standard 8-ounce glass. This applies to whole, 2%, 1%, and skim milk equally, since vitamin D is added during processing rather than coming from the milk fat itself.
One common assumption is that whole milk delivers more vitamin D because the vitamin is fat-soluble. In practice, the fortification process ensures consistent levels regardless of fat content. Research on vitamin D absorption with different fat levels has produced surprising results: one study found that a low-fat meal actually increased short-term vitamin D absorption compared to a high-fat meal or no meal at all, though long-term blood levels evened out.
Fortified Orange Juice
Fortified orange juice is the go-to option for people who avoid dairy. Most commercial brands add around 100 IU of vitamin D per 8-ounce serving, matching the levels in milk. Some brands go higher. In clinical research, orange juice fortified with 1,000 IU per serving raised participants’ blood vitamin D levels by more than 150% over 12 weeks, performing just as well as a supplement capsule.
Not all orange juice is fortified, so check the label. Look for “vitamin D” in the nutrition facts panel. Brands that add calcium often add vitamin D alongside it, since the two nutrients work together for bone health.
Plant-Based Milk Alternatives
Soy milk, almond milk, oat milk, and other plant-based beverages are frequently fortified with vitamin D. The FDA allows plant-based milk alternatives to contain up to 84 IU per 100 grams, which translates to roughly 200 IU per 8-ounce serving. In practice, most brands fortify to about 100 to 120 IU per serving to mirror cow’s milk.
There’s one important difference: plant-based milks are typically fortified with vitamin D2 (the plant-derived form), while cow’s milk uses vitamin D3 (the animal-derived form). This matters because D3 is more effective at raising your blood levels. A randomized controlled trial found that D3 raised blood concentrations by about 46 nmol/L on average, compared to 31 nmol/L for D2. That’s roughly 50% more effective. If you rely heavily on plant-based milk for your vitamin D, you may need to drink more of it or supplement separately to match what you’d get from cow’s milk.
Some newer plant-based brands have started using D3 sourced from lichen (a vegan-friendly option). Check the ingredient list if this distinction matters to you.
Vitamin-Enhanced Water and Functional Beverages
Vitamin-enhanced waters and functional drinks sometimes include vitamin D, but the amounts vary wildly by brand and product line. Some bottled waters marketed as “vitamin water” contain 100 to 150 IU per bottle, while others list vitamin D on the front label but include negligible amounts. Harvard’s School of Public Health has noted that vitamin-enhanced waters are generally unnecessary for anyone already taking a multivitamin, and the added sugars in many of these products can undermine their nutritional value.
Protein shakes, meal replacement drinks, and some sports beverages also contain vitamin D, typically at 100 to 200 IU per serving. These can contribute to your daily intake, but they’re usually more expensive per IU of vitamin D than milk or fortified juice.
Drinks That Don’t Have Vitamin D
Regular coffee, tea, soda, beer, wine, and unflavored water contain no vitamin D. Unfortified fruit juices, coconut water, and most kombucha products are also vitamin D-free. If a beverage doesn’t specifically say “fortified with vitamin D” on the label, assume it has none.
Plain kefir and drinkable yogurt contain small amounts of vitamin D from the dairy base, but the levels are modest compared to fortified milk unless the manufacturer has added extra. Again, the label is your best guide.
How Much You Actually Need
The recommended daily intake of vitamin D is 600 IU for most people between the ages of 1 and 70. Adults over 71 need 800 IU. To put that in perspective, you’d need to drink about four to six glasses of fortified milk or orange juice daily to meet your full requirement from beverages alone. Most people get vitamin D from a combination of drinks, food (fatty fish, eggs, fortified cereal), sunlight, and supplements.
If you’re choosing between beverages purely for vitamin D content, prioritize drinks fortified with D3 over D2 when possible. The difference in how well your body uses each form is significant enough to matter over months of consistent intake. And since vitamin D is fat-soluble, drinking fortified milk or juice alongside a meal that contains some fat can support absorption, though even drinking it on an empty stomach still provides meaningful benefit.