📝 Detailed Answer
I have personal experience with the downsides of konjac; I once suffered from dizziness after trying to sustain myself solely on it for weight loss. While konjac is undoubtedly a 'hero' ingredient for dieting, relying on it exclusively can become toxic to the system. You must weigh its pros and cons based on your specific constitution.
On the positive side, konjac is nearly calorie-free and packed with dietary fiber, offering excellent satiety. It serves as a sturdy shield when 'false hunger' leads to intense cravings. Its high water content also helps alleviate constipation, which is a common concern during weight loss.
However, in Traditional Korean Medicine, konjac is considered to have a very 'cold' property. If individuals with Bi-heo (Spleen Deficiency—weakness in digestive function) consume it excessively, their digestive fire can be extinguished, leading to bloating and indigestion. Furthermore, since it has virtually zero nutritional value, long-term consumption as a staple can lead to side effects like thinning hair or a sudden depletion of Qi (vital energy).
Your current physical condition is the most important factor. It is an excellent supplement for those prone to swelling due to accumulated Dam-eum (Phlegm-Fluid/body waste), but if you have a weak stomach and frequent diarrhea, it is best to avoid it. Use konjac wisely as a way to soothe hunger between meals rather than as a primary source of nutrition.