Stabilizers & Fibers
Soy Lecithin in gelato
Soy lecithin is a soybean-derived emulsifier composed almost entirely of phospholipids and residual soybean oil. In gelato it destabilizes fat and stabilizes the water/fat interface, promoting a smoother, drier, more emulsified body without contributing sweetness or affecting the freezing point.
Balancing parameters
Per 100 g of product, verified against independent food-science sources (listed below).
| Parameter | Value |
|---|---|
| Total Solids | 99% |
| Water | 1% |
| Sugars | 0% |
| Fat | 97% |
| MSNF | 0% |
| Protein | 0% |
| POD (sweetening power) | 0 |
| PAC (anti-freezing power) | 0 |
Typical use: 0.1%-0.5% of the total mix (often 0.2%-0.5% when replacing egg yolk; ~0.06%-0.1% for functional emulsification alongside other emulsifiers)
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Open the balancerHow to use it in gelato
Soy lecithin acts as an emulsifier: its phospholipids straddle the fat-water interface, displacing milk proteins from the fat globule surface and promoting controlled partial fat coalescence during freezing. This yields a drier, smoother, more stable emulsion with finer air cells and better meltdown, and it can partially or fully replace egg yolk in egg-free recipes. It contributes essentially no solids to the balance at typical dosages and has zero POD and zero PAC, so it does not change sweetness or the freezing point; adjust sugars and stabilizers independently. Overdosing can cause a waxy or off flavor and excessive fat destabilization.
Origin & background
The name lecithin comes from the Greek 'lekithos' (egg yolk); French chemist Theodore Gobley first isolated and named it from egg yolk in 1846. Commercial soy lecithin emerged in the 1920s-1930s in Germany as a by-product recovered from the water-degumming (desliming) step of crude soybean oil refining, which remains the primary industrial source today.
Frequently asked questions
Sources
- https://fdc.nal.usda.gov/food-details/171426/nutrients (USDA FoodData Central - Oil, soybean lecithin: 100 g fat, 0 g protein, 0 g carbohydrate, 0 g water per 100 g)
- https://tools.myfooddata.com/nutrition-facts/171426/wt1 (mirror of USDA FDC 171426)
- https://link.springer.com/article/10.1007/BF02659652 (JAOCS, 'Composition of soybean lecithin' - phospholipid/oil breakdown)
- https://lecipro.com/2021/10/27/composition-of-soybean-lecithin/ (Manufacturer spec: ~35% soybean oil + ~65% phospholipids, moisture <=1.5%, <5% non-lipid)
- https://under-belly.org/ice-cream-emulsifiers/ (support source - lecithin emulsifier function and dosage in ice cream/gelato)