Keto Diet Question

What are the long-term health effects of the keto diet?

I've been thinking about starting a keto diet for weight loss but I'm worried about the long-term effects. Can someone explain the health benefits and risks of staying on a keto diet for a long time? Are there any nutritional deficiencies to watch out for, and how can I prevent them? Lastly, is this diet sustainable for maintaining a healthy lifestyle over time?