Casein is a slow-digesting, high-quality complete protein that provides a sustained release of amino acids. It is especially valued by athletes and fitness enthusiasts who need to suppress muscle breakdown over long periods and is also a key functional ingredient in the food industry. For most people, dairy products obtained through a normal diet are the best source of casein; for those with specific nutritional needs, casein supplements offer a convenient and effective option. Anyone with allergies or digestive issues should consult a doctor or dietitian.

       China is one of the world’s largest markets for casein, but not a production powerhouse. The domestic market relies heavily on imports, although local industries are now seeking to expand under policy and market drivers. Customs data show that in January-September 2025 China exported US$797,000 of casein, down 66.37% year on year, with export volume at 99 tonnes, down 62.77%. Imports for the same period totaled US$120 million, down 16.64%, while import volume fell 29.32% to 12,700 tonnes.

  Market snapshot  

Exports go almost entirely to Asian neighbours—Korea, Thailand, Vietnam, Pakistan, the Philippines and Malaysia.
Imports, by contrast, arrive from New Zealand, Ireland, France, the Netherlands and Germany. New Zealand dominates both volume and value, giving it an irreplaceable core position; Ireland is the next-largest supplier and the key back-up for high-quality product.

  Price bands  

1、Bulk segment (< US$10 kg⁻¹): New Zealand, France, Belarus, Italy—72.7 % of import value

2、Mid-range (US$10–20 kg⁻¹): Ireland, Netherlands, U.S., Spain—27.6 % of value

3、Niche premium (> US$20 kg⁻¹): Germany, Ukraine, Denmark, Austria—< 0.5 % of value but the highest unit prices

Bottom line
China’s casein market is “huge but weak”: massive consumption, minimal domestic output. Upgrading diets and the wellness boom keep import dependence high. Local producers, squeezed by feedstock, technology and environmental costs, are nonetheless racing to catch up under supportive policies and lucrative market prospects. The industry’s future hinges on breakthroughs that cut costs, upgrade process technology and deliver genuinely green production.

       As China's first data company, Guomaotong provides import and export customs data for over 90 countries from 2010 to present. It can accurately analyze market distribution and transaction details of import and export enterprises online, and analyze transaction volumes, prices, and supply cycles. It offers reliable data for foreign trade enterprises and industry consulting firms.