There are differences between malt selenium and yeast selenium in terms of source, production process, nutrient content, absorption effect, and applicable people:

1. Source: Malt selenium is extracted from barley, while yeast selenium is produced by cultivating yeast.

2. Production process: The production process of malt selenium mainly includes steps such as germination, drying and crushing of barley, while the production process of yeast selenium involves the cultivation, fermentation and extraction of yeast.

3. Nutritional Composition: Malt selenium mainly contains selenium yeast and other nutrients, while yeast selenium is mainly selenium-containing organic matter produced by yeast.

4. Absorption effect: Selenium yeast in malt selenium can be more easily absorbed and utilized by the human body, while yeast selenium may be more readily absorbed by the human body because of the organic matter it contains.

5. Suitable for people: Malt selenium is suitable for people of all ages, while yeast selenium is more suitable for those who need to supplement protein and vitamin B.

Overall, both malt selenium and yeast selenium have their own features and advantages.