LCHF foods have best. track record for long term human health. LFHC, started by Ancel Keys based on cherry-picked observational data & made official *.gov policy by George McGovern, et. al., drives Artery Disease, Diabetes, Cancer & Obesity, etc.; verified by public response, clinical research & many clinical trials. LCHF foods improve lipoproteins, blood glucose, BP & other physiologic responses + most feel better.
Low Carb. In addition to the excellent info you already received, I would mention that low carb will put your body into ketosis. Ketosis is a state where our body uses fat for fuel rather than sugar, thus it it fat-burning. This can help reduce sugar craving and lower weight. Do this under guidance from your doc. Peace and good health.