Hermit
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That's right, sugar is harmful. But why no coffee, and why only until the new year? And if you start again after the new year, firstly, all the current efforts will be in vain, and secondly, you will feel worse when you start again. Why not eliminate/significantly reduce consumption on a permanent basis?
Coffee leaches calcium from the body. And it's also harmful in other ways...
Actually, I love sweets!!! But I definitely need to abstain until the New Year. I'll think about what to do next after the New Year.
Added 2 minutes later
I'm going to eat eggshells from two eggs a day.
Всё не так плохо как Вы думаете. Всё намного хуже!