Low carb 28 day plan macros

Generally, no. But it depends what you mean by "success". Weight loss is one thing, health or appearance may be another thing.

It's the calories that will determine fat loss directly. Nutrition - macros and more - only indirectly affects fat loss, if sub-ideal nutrition reduces energy level so we move less, or increases appetite so we can't stick to calorie goal.

Still, nutrition is important for health, and macro percents don't tell the whole story. For best health, we need certain absolute amounts - a certain minimum number of grams - of some nutrients. That includes protein and fats. If a person's eating too-low calories, there's no getting adequate nutrition.

If coming in way under calorie goal - if that's happening, as I suspect it might with fats low especially - may not be a sustainable plan, or the most health-promoting path. If it's a rare day when not hungry, no big deal. If done frequently, it can be more of a problem. It depends on how fast you're losing weight on average over a few weeks. Faster loss isn't better loss. It's more risky loss.

Routinely lowballing an already aggressively low calorie goal, if that were to be happening, increases health risk. As time passes, the physical stress of fast loss can increase water weight, too, which masks fat loss on the scale - it can look like weight loss has stalled when it hasn't. Too-fast loss can also negatively affect appearance: Hair thinning or loss, brittle nails, loss of attractive vivacity. It also increases the risk of giving up because it's Just. Too. Hard.

I'm not trying to be discouraging. I'd love to see you succeed: Reaching a healthy weight and staying there has been a huge quality of life improvement for me. I want that for everyone, including you.

Ideally, I'd encourage eating at a calorie level that produces a sensibly moderate, manageable weight loss rate, provides good overall nutrition, and starts to form the habits that will keep a person at a healthy weight permanently. Since most people find maintaining harder than losing, finding that long-term set of habits is really useful, IME, but it's a bit different mindset than thinking of weight loss is a temporary project with an end date.

Best wishes!

The first time I went on a diet, I had no idea that macro was even a thing. I counted calories and that was it. So no, you don't have to hit your macros. The second time around I counted calories but decided I wanted most of my calories from protein and increased my fiber. I felt much better. I didn't worry about a specific macro because calories are more important when it comes to actually losing weight. Macros only affect how you feel while losing weight.