When your adrenal glands become exhausted so will you. After all, your adrenal glands help you deal with stress. They are very vulnerable to fatigue given they are responsible for your fight-or-flight response. Generally the more stress you have in your life, the more vitamin C your adrenal glands will need to operate effectively.
The same scurvy made famous by pirates and British sailors from the 1700s, who would go for months or years at sea without fresh produce, experiencing symptoms from bleeding gums, unexplained swelling, bruises, fatigue. rashes and hemorrhaging is around today as crazy as that may seem!