I interpret this to mean that you fear losing too much weight. This is not something I’ve had to worry about. I’ve been using carb limits at some level for nine years now. I’ve varied the actually daily limit from about 100 grams/day down to the Bernstein level of 30 grams/day. My current daily limit is < 30 grams/day.
Like many people who try carb limits, I lost about 25 pounds when I first put it into place. This is weight that I needed to lose. The weight loss, for me, leveled off above what I would consider my ideal weight. I was never in any danger of losing too much weight.
Dr. Bernstein’s recommended way of eating is to limit carbs to < 30 grams/day but he emphasizes a higher level of protein rather than fat. Many people, including me, adopted a low carb, high fat way of eating inspired by Berstein’s method. I’ve more recently started to replace some of the fat in my diet with protein in an experiment to improve my health and also to lose a few pounds.
I encourage you to experiment with carb-limiting. It it the single biggest reason I enjoy a 90+% time in range (65-130 mg/dL) with very few significant lows and A1c’s in the low 5% range. I also use an automated insulin dosing pump/CGM system to contribute to my success. I think low carb combined with automated insulin dosing is a powerful one-two punch to manage glucose in diabetes.
For many years, decades really, I attempted to manage my glucose with the “carb-up, shoot-up” method and I just couldn’t make it work for me. I know some people can manage their blood sugar levels well using this model but I’m not one of them. At least I couldn’t freely eat all the carbs I wanted with well calculated insulin doses 100% of the time. When I miscalculated my insulin doses, the mistakes were doozies, unhealthy and unsafe. Looking back, eating all the carbs I want and dosing for them seems more like a game of metabolic Russian Roulette to me.
There are people with diabetes who severely limit fat intake and avoid all processed carb intake but do consume hundreds of grams of fruit and veggie carbs per day and still manage their glucose levels well. This is another option, but one I have not chosen.
But that’s me. You may be a person who worries more about keeping weight on, not off. I can’t speak from experience, but I don’t think Dr. B’s way of eating will force you to an unhealthy low weight. In any case, you could try limiting the carbs in your diet and if your weight is dropping too low, you could adjust your eating style to compensate.