Kosher and halal dietary requirements share some similarities but they are not identical. Kosher food is food that meets Jewish dietary laws, while halal food is food that meets Islamic dietary laws. Therefore, while some kosher foods may be considered halal by Muslims, not all kosher foods are necessarily halal.
In terms of protein powders, kosher certification only guarantees that the product has been manufactured and prepared according to Jewish dietary laws. It does not necessarily meet the requirements for halal certification.
Halal certification requirements may vary depending on the certification body but generally require that the product does not contain any ingredients derived from animals that are not slaughtered according to Islamic laws, including pork and its derivatives, and that the manufacturing process does not involve any non-halal ingredients or methods.
Therefore, it is possible for a protein powder to be kosher-certified but not halal-certified, and vice versa.
It is important for consumers who require halal certification to look for products that have been certified by recognized halal certification bodies, such as the Islamic Food and Nutrition Council of America (IFANCA) or the Halal Certification Services.