Which brand of astaxanthin is good? Which brand is the most popular?

Yunnan Alfa is better. Yunnan Alfa Biotechnology Co., Ltd. was established on May 10, 2007. It is located in Chuxiong City, Yunnan Province. It is a company dedicated to the development of the health industry and engaged in rain production. It is a high-tech enterprise integrating R&D, cultivation, processing and sales of Haematococcus and natural astaxanthin products. It is the only enterprise in the world that masters two technologies to produce Haematococcus pluvialis. It has created a new model for the industrial production of Haematococcus pluvialis using barren mountain resources, with more than 400,000 square meters of microalgae base and more than 1,300 kilometers of photosynthetic biological pipelines, leading the world in scale. In March 2013, a wholly-owned subsidiary, Yunnan Alcon Biotechnology Co., Ltd., was established, realizing the extension of the industrial chain. Become the first company in the industry to develop natural astaxanthin throughout the entire industry chain. In November 2015, it was successfully listed on the "New Third Board" (securities abbreviation: Alfa; stock code: 834118), becoming the first company in the industry to be listed on the New Third Board. In 2016, the entire company's production system complied with US requirements (passed US organic food certification and passed US FDA GMP certification). In 2021, the entire astaxanthin industry chain will be laid out (establishing an independent R&D center, strategic co-tenants: GPHL, Eternal Asia). It has more than 100 national patents and its products are sold to more than 20 countries. The United States, South Korea, Japan, Australia, etc.