You dont always need both, but many people benefit from a combination, especially during high-demand seasons like pregnancy, breastfeeding, or chronic stress
Causes include not ingesting enough of the
Summary AOD 9604 Vials serve as invaluable tools for researchers aiming to expand our understanding of fat metabolism, obesity, and the regenerative properties associated with growth hormone

A variety of factors can put someone at risk for a nutrient deficiency, including: Inadequate diet Increased nutrient demands due to pregnancy, breastfeeding, and menstruation Decreased nutrient absorption from GI conditions like celiac and Crohn's disease Genetic mutations (like the MTHFR polymorphism) Lower bioavailability of some nutrients (e.g., zinc and iron) from plant versus animal sources Decreased synthesis of vitamin D from sunlight among individuals with dark-colored skin Common medications that impact nutrient absorption, metabolism, and excretion Aging, which can trigger changes (such as decreased stomach acid) that decrease vitamin D and B12 absorption Now let's explore seven common nutrient deficiencies that can impact metabolic health and the blood tests that check for these deficiencies
10.1371/journal.pmed.1000097 37 NIHR (2025)