How do you know if you are physically exhausted?

Physical signs of mental exhaustion may include:headaches.upset stomach.body aches.chronic fatigue.changes in appetite.insomnia.weight gain or weight loss.increased illness, such as colds and flu.

Does b12 keep you awake?

Vitamin B12 also helps the body process carbohydrates into glucose, naturally creating energy, lifting brain fog, and increasing alertness.

Is it OK to take b12 at night?

You may need to take vitamin B-12 separately from the above drugs and supplements — say, one in the morning and one at night — so you can get the full dose of vitamin B-12. Don’t take vitamin B-12 supplements if you have sensitivities or allergies to vitamin B-12, cobalt, and any other ingredients.

Can I take my vitamins at night?

When to take supplements He suggests taking your dietary supplements at night isn’t advisable. “Digestion slows down during sleep, so taking your nutrient supplement late at night would not be associated with an efficient absorption.”