Keto supplements are necessary in the same way vegans and vegetarians need supplements. For example, one of the most important ones is Omega-3, because there will be a ton of Omega-6 in the fatty meats you’ll be eating. Both are essential fatty acids, but it’s UNHEALTHY to have more Omega-6 than Omega-3 in your system. Cancer, asthma and other illnesses are linked to this imbalance. Since you’ll be ingesting tons of Omega-6 in a keto diet, Omega-3 is probably the most important supplement for you to take.