Again, this is up to you. Personally speaking, I believe it’s better to get nutrients from food rather than a synthetic vitamin/mineral tablet. A diet rich in a variety of nutrient-dense food is unlikely to necessitate additional vitamin or mineral supplementation. That said, many people find it difficult to get the daily amount of certain minerals, so supplementing is an option. On this note, taking magnesium and potassium supplements can be a big help to people first starting a ketogenic diet. They are helpful because these electrolyte minerals can help reduce the side effects during the ‘keto flu’.