I don't know why we would limit it to adrenal support. The adrenals do respond to stress by secreting hormones like epinephrine and corticosteroids, but the "bad" effect of stress is the effect of these hormones on the rest of the body.
Epinephrine is from an amino acid, tyrosine/phenylalanine, with addition of OH ion. The hydroxylation needs vitamin C for the reaction. I read somewhere that the highest concentration of vitamin C in the body is in the adrenals. So for epinephrine, we would need protein (as source of the needed amino acids) and vitamin C. Protein is one nutrient that really relieves stress in dogs 8), clearly demonstrated in the highest stressed dogs: sled dogs of arctic regions.
Corticosteroids are made from the cholesterol molecule. We usually don't need any of this because the body can make it from glucose. Though really low cholesterol diets have been associated with suicidal tendencies (can't deal with the stress?) so better start eating eggs as well. :wink: It would provide a good source of protein, too.
Now for the "bad" effects of these hormones, particularly corticosteroids. Vitamin A is observed to counter the immunosuppressive effects of corticosteroids. Phosphatidylcholine (lecithin) and phosphatidylserine have shown reduction of the protein breakdown from corticosteroids brought about by stress (read this in muscle mags). Since an effect of corticosteroids is protein breakdown to supply needed glucose for possible fight-or-flight, then it would be good to have protein, too, if not glucose (carbs). Of course, utilization of these would require the B-complex, alpha lipoic acid, and oxygen.
In all, we're always under stress. It's just how much our body can respond.
For non-nutritional approaches to dealing with stress:
1. Exercise -- uses up or vents the effects of the stress hormones. We don't fight-or-flee, which is what the hormones were made for, and so we must fight-or-flee artificially with exercise.
2. Breathing -- calms the mind and thus limits adrenal hormone secretion.
3. Mental technics -- meditation, breathing as mentioned
4. EFT: https://tinyurl.com/cbv22
-- meridian based system to balance body energy. If you haven't done so, download the free manuals and study this easy and quick procedure.