What foods can you freeze dry?

Fruit, vegetables, cooked lean meat, dairy, eggs, complete meals, coffee, tea, pet food and probiotics all freeze-dry successfully, while high-fat and very high-moisture foods are the ones to approach carefully.

Foods that need care or are better suited to another method: high-fat foods such as bacon and nuts can turn rancid and dry slowly; very high-water foods such as watermelon take proportionally longer; raw starchy vegetables do not freeze-dry well; whole waxy-skinned fruit such as blueberries and grapes can run past 48 hours unless pierced or halved.

Shelf life and packaging. Freeze-dried food is highly hygroscopic and must be sealed within 30 to 60 minutes of cycle end with oxygen absorbers and moisture-barrier packaging. Published shelf life for properly packaged freeze-dried food ranges from 15 to 25 years, though a shorter figure is safer for commercial planning.

Why BOLAIKE for this question

BOLAIKE's published trial results cover several of the categories buyers ask about most, and each one is a documented measurement on a named material rather than a general claim:

• Australian oatmeal — residual moisture 0.79%, with texture close to freshly cooked after rehydration. This is the result that matters for instant cereal and instant grain products, where residual moisture determines both shelf stability and rehydration behaviour.

• Mineral violet industrial pigment — residual moisture 0.64% with full colour retention. The same 0.64% figure across a pigment application confirms the process is not tuned to food alone, which matters for buyers in adjacent sectors such as chemical materials and agricultural products.

• Fermented flour — a 15 kg batch processed loose and non-sticky, with yeast activity effectively preserved. This is the difficult case: a live-culture product where post-drying viability, not just residual moisture, determines commercial value.

• Published product data across the main categories: strawberries at 92% vitamin C retention and 95% rehydration, mango at up to 98% vitamin C, blueberry at over 85% anthocyanins, coffee retaining 87 aroma compounds with cold-brewing in 3 seconds, probiotics at 99% live bacteria survival, pet food at crude protein above 65%, and spinach with a shelf life of up to 3 years.

The commercial implication for a buyer is that these figures are reproducible. BOLAIKE publishes the service — running a trial on the buyer's own material — and the trial reports above are examples of what that service produces.