A full blood count and serum B12 measurement are straightforward investigations that can help differentiate causes
In research, 5-Amino-1MQ is being studied in combination with complementary compounds: caloric restriction (demonstrated synergistic effect on the microbiome), NMN/NR (NAD+ precursors), and physical exercise (sustained performance enhancement)

Dietary ConsiderationsDairy/ Milk Free Gluten Free Soy Free Non-GMO Serving Size: 3 Capsule Servings Per Container: 30 Amount Per ServingArginine Alpha-Ketoglutarate 500 mg Trimethylglycine (TMG)(as Betaine Anhydrous) 500 mg Bergamont Orange Extract (citrus bergamia)(Fruit) (Bergamonte) (38% Bergamot Polyphenolic Fraction comprised of Neohesperidin, Naringin, Neoeriocitrin, Brutierifin and Melitidin) 250 mg Epigallocatechin Gallate (EGCG) (from Green Tea 98% Extract) 100 mg Taxifolin (from Dihydroquercetin) 10 mg Spermidine 10 mg Other Ingredients: Vegetable Capsule (Hypromellose, Titanium Dioxide) Dosage: Take 3 capsules daily, or as recommended by your healthcare professional If pregnant, nursing, or taking prescription drugs, consult your healthcare professional prior to use
BPC-157 might be slightly safer due to localised action
And he has this published paper where you have clear adrenal from a stressed animal versus a non stressed animal, a thymus from an animal that's stressed versus not