From my research, here's way's I've found to reduce cortisol, while increasing testosterone.
- loving relationship
- Increase testosterone to estrogen ratio
- highly nutritious diet
- Avoiding threatening stimuli
- Avoiding chronic stress
- potassium deficiency
- do not overtrain
- maintain quality downtime
- atleast 8 hours of sleep a night
- consume high glycemic carbohydrate to increase insulin levels directly after an intense workout for insulin interferes with cortisol
- Vitamins: A and C
- Hormones: Melatonin and DHEA (pref. w/resveratrol)
- Minerals: Magnesium and Zinc
- Amino acids: acetyl L-carnitine, L-glutamine
- Herbs: Siberian Ginseng
- Other: Phosphatidylserine
DHEA is probably the most powerful for cortisol inhibition. It is the mother of all steroid hormones, so it metabolizes into testosterone, estrogens, pheromones, and others. It's also a potent sigma-1 agonist which might explain it's anti-depressant effects. I reccomend taking this supplement with resveratrol (usually included with DHEA), because it acts as a prohormone, preventing testosterone from metabolizing into estrogens, and is also a potent anti-oxidant. Stress can cause a lot of free-radical damage, so taking anti-oxidants like resveratrol and vitamin C would be a good idea.
Here's ways you to reduce activity of adrenergic hormones:
Alpha or Beta-blockers
fresh air
stretching
Moderate excercise
drink glass of water or rehydration drink,
take hot bath or shower,
nap
vision excercises (bates/eye yoga)
high levels of acetylcholine-serotonin-adenosine-PGE-histamine-enkephalin-dopamine-ATP
avoid sugar, stimulants, videogames, life-endangering situations, high-intensity excercise, and threatening stimuli.
Of course, alpha and beta-blockers provide the most instantaneous powerful antagonism of adrenergic receptors, but they can have a rebound effect after prolonged use, and cause an adrenergic overload leading to panic attacks, physical tension, anxiety, and such.
Vasopressin can be inhibited with adequate hydration. Caffeine and alcohol are known to inhibit it as well, explaining the frequent urination.
Endogenous cannabinoids and opioids, prolactin, 5-HT, and other neurotransmitters or hormones are also released in the stress response, but they are less physically detrimental with prolonged activity.