Does dessicated beef liver powder contain the same many vitamins as fresh beef liver? or does the 'cooking' process take away the vitamins?

Some vitamins, especially vitamin C are lost or partly lost in the process of cooking. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex