Core Viewpoint - The article discusses a breakthrough in 3D bioprinting technology, specifically the development of a cell-dense bioink (CLINK) that allows for the direct printing of complex, functional living tissues without the need for scaffolding materials, addressing the limitations of traditional bioprinting methods [3][4][24]. Group 1: Traditional Bioprinting Limitations - Traditional 3D bioprinting relies on hydrogels that dilute cell density, resulting in printed tissues that are significantly less dense than real human organs, which can have cell densities as high as 100 million to 1 billion cells per milliliter [7][8]. - The presence of hydrogel scaffolds can physically obstruct direct cell communication, potentially leading to loss of cell characteristics and functionality [8]. Group 2: CLINK Technology Overview - The CLINK technology represents a paradigm shift by allowing cells to act as the building blocks for structures, utilizing a special connecting molecule (OMHA) that adheres to cell membranes and facilitates strong connections between adjacent cells under specific light conditions [10][11]. - This method enables the creation of highly dense tissues, achieving cell densities of up to 1 billion cells per milliliter, closely mimicking the physiological environment of living tissues [15]. Group 3: Applications and Results - The research team successfully printed various functional high-density organ tissue models, including: 1. A "mini heart" that exhibits rhythmic contractions similar to real cardiac cells [18]. 2. Functional neural circuits formed by connecting cortical and spinal motor neurons, demonstrating successful electrical signal transmission [19]. 3. A bioengineered liver tissue that shows enhanced liver-specific functions and integrates well when implanted in mice [20]. 4. Accelerated healing of full-thickness skin wounds in mice using CLINK-printed grafts, outperforming traditional hydrogel carriers [21]. Group 4: Future Prospects - This innovative "pure cell" 3D bioprinting technology paves the way for personalized organ manufacturing, drug screening, regenerative medicine, and fundamental research into human development and disease mechanisms [24][25].

Industry Overview - The collagen protein food industry in China is experiencing significant growth, with a retail market size projected to reach 30.1 billion yuan in 2024, reflecting a year-on-year increase of 13.37% [1][6] - The demand for collagen protein foods is driven by consumer interest in skin care, bone health, and anti-aging, particularly among younger generations who prefer dietary sources for health and beauty [1][6] Industry Chain - The upstream of the collagen protein food industry includes raw materials such as skins, tendons, and bones from terrestrial livestock (cattle, pigs) and aquatic sources (fish skins, scales) [4][5] - The midstream involves the production and manufacturing of collagen protein foods, while the downstream focuses on the food sector [4][5] Market Size - The global retail market for collagen protein foods is expected to reach USD 20.48 billion in 2024, with a year-on-year growth of 1.79% [6] - The abundant supply of raw materials in China, due to large-scale livestock and fish production, supports the growth of the collagen protein food sector [6] Key Companies Performance - Tongrentang has made significant strides in the collagen protein food sector, launching products with innovative formulations and high-quality ingredients, such as collagen peptides derived from cod skin [7][8] - Kangnabei has also achieved notable success, offering high-content collagen peptide drinks and protein powders, with a focus on safety and quality standards [8] Industry Development Trends 1. Technological advancements are driving product innovation and industry upgrades, with breakthroughs in recombinant collagen technology leading to cost reductions and enhanced bioactivity [9] 2. Market demand is diversifying, with a growing interest in functional skincare products among younger consumers and increased demand for joint health solutions among older adults [10] 3. The rise of online sales channels and social media marketing is becoming crucial for industry growth, with companies leveraging e-commerce platforms for product promotion and consumer engagement [11][12]