What rate of weight/fat loss is healthy?

Seems like the slower you lose it the more chance of keeping it off:-

https://www.cdc.gov/healthyweight/losing_weight/index.html

 

This is advice from the US regulator:-

https://www.cdc.gov/healthyweight/losing_weight/index.html

 

AS far as bodybuilding is considered, loosing more than 2lb per week can result in loss of muscles along with the fat.
With proper high protein diet and supplements such as the glutamine, you can loose 2 lb pure fat ( not 100% pure but some of it ) per week.
Loosing two lb means creating a 1000kcals deficit per day. That's not much difficult.
however for middle age I would say 1lb per week is ok. Keep it slow and live the journey.

 

When you say a "1000kcals deficit" do you mean basically you are working off 1000kcals a day more than you are putting into your body?

 

When it comes to weight and fat loss, it's important to prioritize overall health and focus on sustainable changes rather than rapid results. The rate of weight or fat loss can vary depending on various factors, including individual metabolism, body composition, and overall health. However, a general guideline for healthy and sustainable weight loss is to aim for a gradual rate of 1-2 pounds (0.5-1 kg) per week.