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A faster start to your first homemade loaf.
$19.99
Our on-staff fermenters offer support whenever you need a hand. Get in touch.
If anything goes wrong with your culture, we'll send you a free replacement, though we don't think you'll need one. See our culture guarantee.
Enjoy free standard shipping on eligible U.S. orders over $49.99. See shipping details.
Not what you expected? We offer 60-day, no-hassle returns. See our returns policy.
Never baked? Tried and flopped? You’re not starting alone. Clear steps. A support team one message away. Your next bake is worth sharing.
Rapid starter photos alongside bakes from our San Francisco and gluten-free sourdough community.
EVERY CULTURE WE MAKE IS FOOD-SAFETY TESTED.
A MOM’S REASON. OUR STANDARD SINCE 2002.
Cultures for Health was founded in 2002 by a single mom who wanted to feed her children the best food she could.
That care still shapes what we make. Food-safety testing is a meaningful investment, and one we keep making for the families who bring our cultures home.
Start something good in your kitchen →
From packet to proud-of-it.
Sourdough takes a little patience, not a new personality. Here’s the path.
Add bread flour or all-purpose flour and water, then follow the Rapid activation guide. Bake when your starter doubles within 4–8 hours of feeding, not just when the clock says so.
Follow a sourdough recipe using your active starter. You bring the ingredients and oven; we bring the guide and support.
Keep some starter, feed it, and keep baking. Bread today. Pizza, pancakes, or a new favorite next.
ONE STARTER. ENDLESS BAKES.
Keep your heirloom starter active with regular feeding and care, then try these sourdough recipes:
01The iconic loaf: blistered crust, airy crumb, and homemade sourdough flavor.
Get the recipe →
02Naturally fermented for deeper flavor and crisp edges on pizza night.
Get the recipe →
03Turn starter discard into tender, fluffy weekend breakfast pancakes in under 20 minutes.
Get the recipe →A little reassurance goes a long way.
Get started with 60-day, no-hassle returns. And whenever you have a sourdough question, our on-staff fermenters are here to help. Next week, next month, or next year.
See our guarantee →72- Hour Rapid Sourdough Starter$19.99
Before you start.
One packet of dehydrated Rapid Sourdough Starter with activation instructions. Add flour and water and follow the Rapid starter guide.
Your Rapid Sourdough Starter is ready to bake with in 72 hours. Follow the included activation instructions, then use your active starter in your favorite sourdough recipe.
The Rapid guide recommends organic bread flour for a higher rise. All-purpose flour also works; follow the guide’s measurements for the flour you use.
No. This culture contains organic white wheat flour and live active cultures. The current product listing says it is manufactured in a facility that processes products containing gluten. For a gluten-free starter, see our Gluten-Free Sourdough Starter Culture.
No. Save a portion of your starter and keep feeding and maintaining it according to the Rapid guide so you can keep baking.
Bread flour or all-purpose flour, water free of chlorine and fluoride, a quart-size glass jar, a coffee filter or tight-weave cloth, a rubber band and a mixing utensil. A kitchen scale is optional but makes measurements more precise. Recipe ingredients and baking equipment are separate.
Store the starter in a cool, dry place and use it by the date on the bag. Once activated, follow the Rapid guide’s feeding and storage instructions.
Our on-staff fermenters can help you troubleshoot. Contact our team. Culture replacements are subject to our culture guarantee; 60-day returns are separate from ongoing support.
Free standard shipping is available on qualifying orders of $49.99 or more to the contiguous U.S. Discounts may affect eligibility. Other destinations have separate rates. Confirm shipping options and charges at checkout.
