Why I Can’t Find XOS + GOS Anywhere? And Maybe You Can?

Recently I went down the rabbit hole of prebiotics. I wasn’t looking for the usual inulin or FOS — those are everywhere. I was curious about the “next level” stuff: XOS (xylooligosaccharides) and GOS (galactooligosaccharides).

On paper, they look amazing:

• XOS works in tiny doses (1–2 g/day), selectively feeding bifidobacteria and lactobacilli.
• GOS is literally part of human breast milk, one of the most natural prebiotics out there.
• Together (XOS + GOS), they seem to be the most effective combo — strong benefits without needing huge scoops of fiber.

So I thought: Great, let me order some.

That’s where the problem started.

I checked iHerb — discontinued.
I searched Amazon — mostly out of stock, or insanely overpriced.
Even the big supplement brands I trusted (like Jarrow) had pulled their XOS+GOS products.

It turns out there are a few reasons:

• Production is more complicated (and expensive) than inulin.
• Regulations in the EU and US make XOS a “novel food,” which slows things down.
• Most consumers are fine with cheap inulin, so companies don’t see enough demand to keep XOS/GOS in stock.

Meanwhile, inulin is everywhere. And yes, it works — but usually at 5–10 g/day, and many people (me included) find it causes bloating and gas at higher doses.

XOS and GOS, by contrast, seem to work better and faster, but they’ve basically vanished from the mainstream market.

I’ve only managed to find a few niche European brands that still sell capsules, but delivery times are long, and stock is unreliable.

So here’s my question to you:

Has anyone here actually found a reliable source for XOS + GOS supplements? Do you use them and see results you’re happy with?

If so, I’d love to hear where you buy them — because right now, it feels like searching for a hidden treasure.