If you're deciding whether to spend more on a fancier shotgun microbiome test, here's a finding that could save you real money: for general diversity questions, the cheaper option performs just as well. This piece is a deeper look at the two testing technologies behind these products, what they actually cost, and an important caution from a recent expert panel worth knowing before you buy one.
The two methods, in plain terms
16S sequencing reads one specific bacterial gene to identify broad groups of bacteria. It's cheaper, faster, and fine for general questions about diversity, but it can't reliably tell you the exact species or strain you're looking at. Shotgun sequencing reads all the DNA in your sample, bacterial, fungal, viral, even trace human cells, giving you species and sometimes strain-level detail, plus insight into what those microbes can actually do. That's a lot more information, at meaningfully higher cost.
Real numbers on cost and turnaround
Basic consumer 16S tests typically run $50 to $200 (roughly ₱3,000 to ₱12,300) with results back in one to three weeks. Standard shotgun tests cost considerably more, $200 to $800 (around ₱12,300 to ₱49,300), taking two to six weeks, and deep, research-grade shotgun testing can run $800 to $2,000 or more (around ₱49,300 to ₱123,400). Most consumer tests on the market still use 16S specifically because of this cost and speed advantage, even though shotgun captures more detail. Note that these are US pricing benchmarks from the available research, actual cost and availability may vary if you're ordering from outside the US, so check shipping and import factors before buying.
Sometimes cheaper genuinely is enough
A study comparing 16S and shotgun sequencing on the same set of samples found the two methods gave similar results for diversity measures and produced comparably accurate predictions. This was confirmed in a second, independent dataset too. For some questions, particularly general diversity, the pricier shotgun approach doesn't necessarily outperform 16S enough to justify the extra cost.
The caution worth taking seriously
A 2025 statement from a panel of physicians and researchers explicitly warned that microbiome testing currently doesn't have enough evidence to support routine use for personalized nutrition advice. That's a meaningful, recent statement from people with nothing to sell, worth weighing against any marketing claiming a test can precisely tailor your diet to your results.
If you're just curious about your gut bacteria and want a general snapshot, a basic 16S test is a reasonable, lower-cost starting point. If you have a specific clinical concern, discuss shotgun sequencing with your gastroenterologist rather than a consumer product, since that's the context where the extra detail genuinely matters. Whatever you choose, treat the results as one data point for curiosity, not a precise blueprint for exactly what to eat. The fundamentals covered throughout this site, fiber diversity, fermented foods, consistent sleep, remain the best-supported path regardless of what any single test result shows you.
This content is for educational purposes only and is not a substitute for professional medical advice.