SAN FRANCISCO — Cryptocurrency hasn’t worked out so well for tech investors. As a consumer product, supplements are associated more with the Kardashians or Joe Rogan than with Silicon Valley. Roelof Botha, the managing partner of Sequoia Capital, one of the largest venture capital firms in the world, is among those buying in. He said there’s a “societal reawakening” about the complex biome of the human gut where hundreds of species of bacteria live. She co-wrote a review of the science this year, and said future probiotic supplements have promise compared to supplements that have been available for decades.

---