Bioavailability? What does that big word mean for the juice enjoyers?
Let's get that sorted right now. Bioavailability is simply the proportion of a drug, vitamin, or nutrient that is absorbed and used by the body. When we talk about nutrient bioavailability specifically, we mean how much of a vitamin, mineral, or phytonutrient actually reaches your bloodstream and cells after you eat or drink it.
Why does bioavailability matter?
If two things (maybe a juice or a solid food) contain the same amount of vitamin C, one has a chance to deliver it into your circulation faster and more completely - in that case, that is more bioavailable. That matters for people who rely on diet to correct deficiencies, athletes who need rapid recovery, and anyone who wants the benefits of juicing with realistic expectations.
Cold pressed methods aim to preserve heat sensitive vitamins and reduce oxidation, which can help preserve labile compounds. It often can deliver a concentrated amount of vitamins and polyphenols with minimal heat damage (compared to methods like blending).
That can make certain compounds more bioavailable than in whole produce. Carotenoids (such as beta carotene) are often more accessible after cell walls are broken and when consumed with fat. Vitamin C and many polyphenols are also readily available in fresh juice, especially when oxidation is minimized by cold pressing.
Now, what could be the con? Removing most insoluble fiber is the key change. Cold pressed juices are the liquids from fruits and vegetables. Simply put, there are no pulp, skins, or seeds. It makes the juices smoother and generally easier to digest, but the fiber separation means you lose insoluble fiber - which adds bulk to your stool and speeds up digestion. Put simply, removing fiber changes the metabolic response.
What about your soluble fibers? That remains. This is the type of fiber that dissolves in water and turns into a gel-like substance in your gut, which improves gut bacteria and supports healthy blood sugar levels.
This isn't something you can time, unlike a train schedule. But, generally, liquids empty from the stomach far faster than solids, so a cold pressed juice will typically pass into the small intestine within about 15 to 45 minutes, depending on sugar and fat content, and nutrients begin to appear in the bloodstream soon after.
Nutrient bioavailability isn't a one-size-fits-all. Many factors affect it. If you're curious, the list below should help clear up some of them.
Food Structure (Whole Food vs Juice)
Whole foods hold vitamins, minerals, and phytochemicals inside cell walls and complex matrices that slow release during digestion. While cold press juicing may help you absorb certain nutrients better, keeping solid foods as they are can also affect nutrient bioavailability all the same - there needs to be a balance.
Whole fruits or a fiber-rich meals will digest more slowly and keep you feeling fuller for longer. Sure, a juice can help you bump up your nutrient intake from time to time, but making yourself a proper meal would always be preferred. Cold pressed juices are best when drunk as a complement to your diet, not a substitute.
Fat is essential for absorbing fat-soluble vitamins A, D, E, and K and carotenoids. Even a small amount of dietary fat in a meal could increase micelle formation and uptake by intestinal cells. Adding a drizzle of oil or a few slices of avocado to may boost absorption of these nutrients.
Remember, heat can work both ways - increase and decrease bioavailability of certain nutrients. For example, cooking tomatoes could increase carotenoid availability because heat breaks down cell walls and releases bound compounds. In contrast, water-soluble vitamins like vitamin C and B vitamins (thiamine, folate, niacin - for example) are affected by heat.
A diverse, balanced microbiome enhances bioavailability by fermenting fiber into short-chain fatty acids, producing certain vitamins and deconjugating bound compounds. Conditions that damage the gut lining, alter transit time or change gastric acidity reduce absorption. Supporting gut health with prebiotic fiber, fermented foods, and appropriate medical care usually improves nutrient uptake over time.
Infants and pregnant people often absorb certain nutrients more efficiently, while older adults commonly have lower stomach acid and altered transporter function that reduces absorption of certain nutrients.
Certain medical conditions damage the digestive tract or interfere with digestive secretions, which directly lowers how much nutrient your body can absorb.
We'll leave you with this. Nothing will ever beat a proper diet. As much as we can rave about cold pressed juices and how awesome they are, your body is a beautifully designed machine capable of digesting, absorbing, and processing the meals and drinks you have.
The key has always been balance. You can't rely on one type of food to give you all the nutrients your body needs. A splash of oil while cooking won't hurt your diet, a bottle of juice with your lunch is a-ok… Remember. Balance.
When we talk about juices here at Little West, we mean cold pressed juices that are never watered down or made with concentrates and sweeteners.
The ones lined up at the supermarket shelves aren't always a good pick, no matter how many fruits and vegetables they have plastered on the packaging. Look at the ingredient list, and you'd be surprised how much added sugars or preservatives are in them.
So, if you want to take a closer look at each of our juices, go on and click the link! We've got nothing to hide.
