How to detect that you are vitamin-lacking

These days, I rarely eat fresh vegetables and fruits, so I feel unfit a lot. The symptom reveals that muscle’s ache, sleep debt, little power, stomatitis, etc.Especially, there are three blebs in my mouth, which make me painful when eating and drinking.

Today, I find that I am absorbing little vitamin from vegetables and fruits. Normally, I would prefer to eat meat rather than vegetables and fruits, but now I know that my recipe is so partial that I have ignored something that I couldn’t gain from my favorite foods.

Yesterday, I go outside to buy a great deal of fruits and eat out them. The function seems effective and my mouth’s blebs become smaller and smaller, now I could eat things at random.
How to detect you are vitamin-lacking? I think the way is so simple that once you have not eaten fresh vegetables or fruits, you should become unfit because of vitamin-lacking.

By the way, the vegetable’s vitamin (C,B,etc) are mostly soluble in water and non-steady against heat, so, most of our cooked vegetables’ vitamin are depleted because of high temperature and soluble traits.

So, I prefer to choose fruit as my complementarity of vitamin, while it do not need be cooked with high temperature and the vitamin are so fluent in the juice. And, if you have a view at my older post, "eat fruit could keep your weight",you could find that fruits also keep one's weight, which is a good news for those who want to lose their weight.

Also, I have ever covered some topics about fruits, such as "Durian's great function " and "Blueberry extract ". Link to these posts and you will love fruits!