My goodness there's so much misunderstanding as to what a low carb diet is!
You need to be eating food in the following ratios:
Fat:protein:carbs
Roughly 70:25:5 in terms of grams.
This changes the 'recommended' diet on its head, which is carbs:protein:fat.
The difficulty with carbs is that people react to them differently. So it's actually really hard to give a recommendation as to the daily amount that you should allow.
But anything like the suggestion made up thread that it's 70-100g a day is impossible to confirm. But bear in mind that a keto diet generally (if you're doing it strictly) is 20g carbs a day. And the first two weeks of Atkins is 20g per day.
Dr Joh Briffa used to say 150g a day, or 30g carbs per meal each day. But that also depends if you're looking to lose weight, or to maintain your weight loss.
Calories do count, but you really don't have to obsessively count/lower calories if you're low carbing.
Here's a good piece from The Diet Doctor which explains that:
Calories count, but they are not the whole story
Generally speaking, if you take in more calories than your body needs, the extra calories will be stored as fat. Similarly, if you take in fewer calories than needed, your body will release its fat stores, and you will lose weight. Because of this, some contend that calories are all that matter.
All you have to do to lose weight is reduce calories.
It sounds simple, but humans are more complicated than that.
There’s far more to weight regulation than just monitoring calories in vs. calories out.
Indeed, most members of the human race appear to have regulated their weight effectively for millennia, before anyone even knew what a calorie was.
The modern obesity epidemic seems to be an unprecedented phenomenon, and it coincides with an ever-increasing focus on counting calories.
At best, counting calories seems to be an imperfect strategy for weight control.
So what’s really going on? As it turns out, hormonal regulation is a key factor and can affect our hunger and cravings.
Hormones play a large role in influencing appetite, fullness, and fat storage. Research suggests that low-carb and keto meals may trigger satiety hormones and suppress hunger hormones, leading to a natural reduction in calorie intake, especially in those who are overweight or have insulin resistance.
Consider the following example of why “a calorie is just a calorie” is too simplistic of a theory. In one study, overweight people consumed a breakfast of eggs or a bagel. Although each meal contained an identical number of calories, the group that consumed the egg breakfast stayed full longer and ate fewer calories at lunch than the group that ate the bagel breakfast.
The two sources of calories — equal in number — consumed at breakfast had differential effects on the number of calories consumed at lunch.
Gut and brain hormones that regulate appetite aren’t the only ones that affect how the body consumes and metabolizes calories. Insulin – and how sensitive your body is to this pancreatic hormone – influences whether you store or burn calories.
Basic physiology dictates that higher levels of insulin will promote the storage of energy (calories) in the form of fat, while lower levels allow the body to mobilize fat stores and use them for energy.
Clinical studies have yielded some helpful insights into how this simple physiologic concept operates in real life, which is decidedly more complex.
For example, one study looked at people who had lost weight and kept it off versus those who lost weight and regained it. It found that those who kept it off maintained better sensitivity to insulin (i.e. had lower levels), while people who regained weight had worse insulin sensitivity – not too surprising. But, subjects who lost weight and kept it off also had better insulin sensitivity than their BMI-matched controls with no weight loss history.
The good news here is that multiple intervention trials have shown that decreasing carbohydrate intake may help those at significant risk for weight regain to maintain the weight they have lost.
Again, this would suggest that a calorie isn’t always just a calorie, as the low-carb diets performed better than other types of diets for the purpose of preventing weight regain after loss.
Calories count, but you don’t have to count them.
– Dr. Eric Westman, MD
What’s more, low-carb diets regularly outperform or perform no worse than low-calorie diets for weight loss, even in studies where calories aren’t intentionally counted or restricted during low-carb eating.