There are many factors that will help you go to sleep. There are two most important factors.  One is that if you eat (few bites) sugary snacks (couple it with fish oil or omega 3), it should be 6 to 8 hrs before your sleep time. And the other one is that your stress level should be very low.

The pituitary gland is responsible for sleep, stress, sex hormones and food cravings.

Our gut microbiome (bacteria and microbes in our intestines) also communicates to our brain to tell us that they are busy or hungry.

When we have food cravings during the day, it is because we did not get quality sleep the night before.

When we are grumpy or stressed out that day, it also means that we did not get good sleep.

Our liver was not able to detox properly, so we have not so healthy skin as a result of poor quality sleep.

Our bedroom must be dimmed since lights tell our pituitary gland that it is not night time yet.

So what did I do to go to sleep at 12 midnight after working making egg rolls until 9pm and eating chocolate desserts at that time? I have to wait till I calm my body and waited till 12midnight to go to sleep. I repeated some prayers to tell my brain to stop worrying or de-stress.  All these even after I took some important dietary supplements to go to sleep (melatonin, calcium and magnesium, Vit D3, zinc, Zyflamend night time caps).

Lesson: Our body needs low glucose and low stress to go to sleep.

Adrenal fatigue

Adrenal fatigue or hypoadrenia are terms used in alternative medicine to describe the unscientificbelief that the adrenal glands are exhausted and unable to produce adequate quantities of hormones, primarily the glucocorticoid cortisol, due to chronic stress or infections.^[1] Adrenal fatigue should not be confused with recognized forms of adrenal dysfunction such as adrenal insufficiency or Addison’s Disease.^[2]

The term “adrenal fatigue”, which was coined in 1998 by James Wilson, a chiropractor,^[3] may be applied to a collection of mostly nonspecific symptoms.^[1] There is no scientific evidence supporting the concept of adrenal fatigue and it is not recognized as a diagnosis by the medical community.^[1][2]

Blood or salivary testing is sometimes offered but there is no evidence that adrenal fatigue exists or can be tested.

Pituitary gland

In vertebrate anatomy, the pituitary gland, or hypophysis, is an endocrine gland about the size of a pea and weighing 0.5 grams (0.018 oz) in humans. It is a protrusion off the bottom of the hypothalamus at the base of the brain. The hypophysis rests upon the hypophysial fossa of the sphenoid bone in the center of the middle cranial fossa and is surrounded by a small bony cavity (sella turcica) covered by a dural fold (diaphragma sellae).^[2] The anterior pituitary (or adenohypophysis) is a lobe of the gland that regulates several physiological processes (including stress, growth, reproduction, and lactation). The intermediate lobe synthesizes and secretes melanocyte-stimulating hormone. The posterior pituitary (or neurohypophysis) is a lobe of the gland that is functionally connected to the hypothalamus by the median eminence via a small tube called the pituitary stalk (also called the infundibular stalk or the infundibulum).

Hormones secreted from the pituitary gland help control: growth, blood pressure, certain functions of the sex organs, thyroid glands and metabolism as well as some aspects of pregnancy, childbirth, nursing, water/salt concentration at the kidneys, temperature regulation and pain relief.