The word means live cultures plus something for them to feed on. In 2020 the International Scientific Association for Probiotics and Prebiotics split synbiotics into two distinctly different categories, because the products calling themselves synbiotic were doing two different jobs.
So which kind is in your cabinet right now?
You can’t tell from the label. Nobody prints it.
Everyone is putting synbiotic on the label now. Nobody is putting which kind.
Complementary
- What's inside
- Cultures and fiber
- Who the substrate feeds
- Whatever is already in you
- How it’s made
- Mix two dry ingredients
- Time together before you buy it
- None
- How you’d know
- You wouldn’t
Synergistic
- What's inside
- Cultures and the substrate they feed on
- Who the substrate feeds
- The cultures in the bottle
- How it’s made
- The substrate has to suit the strains, and both have to survive together
- Time together before you buy it
- Weeks
- How you’d know
- The cultures grew
Most synbiotics are two ingredients that never actually meet.
Complementary is the one on the shelf. A scoop of inulin, some freeze-dried cultures, one product.
The fiber isn’t for those cultures. It’s for whatever is already living in you. The cultures are cargo. They share a container and nothing else, and there is no point at which either affects the other.
Nobody is lying. The word applies. It just costs almost nothing to earn it.
A synbiotic is a real relationship, not just a blend.
Synergistic means the substrate is there for the specific cultures shipping with it, and those cultures have to actually be able to use it. Not fiber in general. That substrate, those strains.
Which is a problem, because you cannot demonstrate that inside most inactive products (like a capsule). Dry cultures aren’t consuming anything. A powder has no way to show a relationship that never had a chance to happen.
The only way to prove it is to let them live together long enough for something to change.
One of these is easy to make. The other one isn’t.
Complementary takes an afternoon. Buy fiber, buy freeze-dried cultures, put them together in a dormant state. Nothing has to survive anything.
Synergistic is a formulation and manufacturing problem. The substrate has to suit the strains you chose. The cultures have to stay alive in a liquid for weeks. The pH has to hold. It has to stay cold from the day it’s made until the day you drink it, or the cultures don’t stay alive.
That’s why the cheaper kind is now the most common kind.
Fermented food got here first
Yogurt, kefir, kimchi, kombucha, sauerkraut. People have been getting live cultures from food for thousands of years, long before anyone put them in a bottle and sold them as a category.
What they don’t do is tell you what’s in them. A jar of kimchi is a wild ferment, and no two jars are the same. Yogurt starts from two specific cultures, and plenty of brands add more without saying how many. Kefir carries a great many, and nobody counts them.
Ours is a fermented food where the whole thing was chosen on purpose. Fifteen named species, in a juice picked to feed them, tested by an independent lab a week after bottling.
Same family. Different amount of deliberation.
Our probiotics have been thriving and multiplying in organic juice since the day we bottled them.
Ours go into pressed fruit and vegetable juice at the facility and stay there. A base that gives them the nutrients they need to feed and grow.
By the time a bottle reaches you they have been in that juice for weeks. Not stored in it. Living in it.
You don’t have to take our word on faith. The cultures multiplied. That’s the receipt.
Gut Health
Over 27 billion CFUs per serving (at the time of manufacture)
Women's Health
15 billion CFUs per serving (at the time of manufacture)
Which is also why it costs more
Cold storage. Cold shipping. A shelf life measured against something alive rather than something dormant.
Most probiotic products have none of those costs, which is exactly why the cheaper kind is the kind you’ve seen.
To do anything at all, probiotics first have to survive the stomach’s high acidity. Probiotics in tablet, powder, or capsule form sit in a kind of dormancy, technically alive, but far less likely to make it through the stomach intact. What a culture has been living in beforehand is not a small detail.
And it has to be worth drinking
Two ounces, cold, straight from the fridge. Just the right amount of sweet and a little tart, no aftertaste.
Nobody keeps up a daily habit they dread, and nobody wants warm juice.
Questions
Is a synbiotic better than a probiotic?
Depends which kind you're holding, and the label won't say. Complementary is a probiotic with fiber added. Synergistic is built so the substrate and the cultures work together. Both print the same word on the front.
What counts as the prebiotic part?
Formally the list is short, and inulin-type fibers are the most common entry on it. The more useful question is whether the cultures in that particular bottle can use what’s in there with them, and whether there’s any way for you to tell.
Why does the cheaper kind exist?
Because it’s easy. Two dry ingredients, one shelf-stable product, no cold chain, and a word on the front that technically applies.