If your starter has been refrigerated for longer than 3 to 4 days, you should feed the starter when you remove it from the fridge, then leave it at room temperature for 4 hours and feed it again.
To maintain a sourdough starter, you extract a sample from a previous ... system because the sourdough microbiome is relatively simple to culture and use for repeated experiments in the lab.
If you’ve ever found yourself wondering: ‘Is sourdough healthy?’ you’re definitely not alone. No longer confined to hipster breakfast spots, sourdough bread is firmly integrated into cafes ...