A meditation practice achieving delta waves can increase the release of growth hormone.

Thyroid can increase the glucose uptake by various tissues especially muscles and bones, which increases bone mineral density (especially important for 30+).

The stimulating hormone often comes from the pituitary, which especially triggers the release of stimulating thyroid. Both of these trigger the thyroid to tigger T3 and T4.

Metabolism is the use of energy for growth, use and repair of tissues and maintenance of function (e.g. brain). It can be increased by increasing the muscle to fat ratio.

The thyroid needs iodine to produce thyroid hormone. Iodine combined with L-Thyrosine to produce T3 and T4.

Weight and endurance training below 60 to 75 minutes promote growth hormone release, higher than that cortisol levels go high enough to inhibit estrogen and testosterone pathways. Warm up well to increase the body temperature and cool down quickly after working out. Growth hormone during exercise spikes for woman in the first 30 minutes and for men... See more

The releasing neurons signal to other neurons to trigger the release of stimulating hormones, which triggers the release of the hormone. The releasing hormone is coming from the brain.

T3 promotes the consumption, conversion and utilization of energy. It acts on bones, organs and muscles.

Arginine can increase the levels of growth hormone under low glucose levels. It also increases the dilation of blood vessels and with that blood flow. L-Citrulline is a precourser of arginine and has a larger effect on arginine levels.