Fermentation vs. Pickling: What's the Difference? | Food Science Explained

What’s the difference between fermentation and pickling? By @wendythefoodscientist As a food scientist, I get this question all the time: Are all pickles fermented? What really makes a pickle a pickle? Let’s dive into the food science: 🥬🥒 Fermentation Uses beneficial bacteria (like Lactobacillus) Converts natural sugars into lactic acid Takes days to weeks depending on salt, temperature, and food type Creates probiotics — great for gut health Complex, tangy flavour develops naturally 👉 In this video: I make kimchi and fermented dill pickles → Kimchi recipe from @thekoreanvegan (I halve the gochugaru for less heat) → Pickles made with a simple 2% salt brine 🥕🧅 Pickling Uses added acid (usually vinegar) Instantly drops the pH — no microbes needed Quick: ready in hours Brighter, cleaner taste of the veg + your chosen aromatics 👉 In this video: I make Vietnamese Đồ Chua and pickled red onions → Basic acid pickling brine: 1:1 vinegar:water + 2 tbsp sugar + 1.5 tsp salt For the Đồ Chua I use my family's recipe, which is more sweet than the basic acid pickling brine. 🧪 Food safety tip: Both methods aim for a pH below 4.6. This prevents harmful bacteria like Clostridium botulinum and makes both approaches safe for home preserving. Whether you want the slow depth of fermentation or the quick tang of pickling, both are delicious, safe, and science-backed ways to preserve your summer harvest. 💬 Do you prefer fermented or pickled veggies? Let me know below! 👇 Save this post for harvest season & follow @wendythefoodscientist for more food science & from-scratch foods. #foodpreservation #fermentation #pickling #foodscience #wendythefoodscientist #kimchi #pickledonions #pickles #harvestseason #guthealth #preservingfood #fromscratchcooking