Electrolytes Blood Markers

Essential trace mineral and cofactor for hundreds of enzymes. Required for testosterone synthesis, immune function, wound healing, protein synthesis, and antioxidant defence.

PED: Highly relevant to athletes. Zinc deficiency lowers testosterone and impairs recovery and immunity, which is why zinc (often as ZMA) is one of the most commonly supplemented minerals in bodybuilding. The flip side matters more than most realise: chronic high-dose zinc supplementation is the leading cause of copper deficiency, which can cause anaemia and low white cells. Zinc and copper compete for absorption, so they should always be interpreted together. Note that serum zinc is an imperfect status marker: it falls with inflammation (it is a negative acute phase reactant), tracks albumin, and is affected by recent meals and time of day, so a single low value is not definitive.

Essential trace mineral and cofactor for ceruloplasmin, iron metabolism, connective tissue cross-linking, energy production, and antioxidant enzymes. Most circulating copper is carried bound to ceruloplasmin.

PED: The mineral most often overlooked in enhanced athletes. The single most common cause of low copper in this population is chronic high-dose zinc supplementation, which blocks copper absorption and can produce anaemia and low neutrophils that mimic a bone marrow disorder. Copper peptides such as GHK-Cu and the GLOW blend are popular for skin and connective tissue, adding to copper interest. On the other side, estrogen raises serum copper: women and anyone with high aromatisation on cycle, or those using estrogenic compounds, will tend to run higher copper because estrogen increases ceruloplasmin synthesis in the liver. Always interpret copper with zinc and, where available, ceruloplasmin.

Essential electrolyte for fluid balance, nerve and muscle function.

PED: Water manipulation during contest prep can affect sodium levels. Generally stable on AAS. Stay hydrated and maintain electrolyte balance.

Essential electrolyte for heart function and muscle contraction.

PED: Diuretic use during contest prep can dangerously deplete potassium. Critical for heart function -- low potassium can cause fatal cardiac arrhythmias. Monitor closely if using diuretics.

Electrolyte that helps maintain fluid balance and acid-base status.

PED: Generally stable on AAS. Can be affected by dehydration or excessive fluid intake. Follows sodium trends in most cases.

Key buffer in the blood that maintains acid-base balance. Low levels indicate metabolic acidosis.

PED: Can be affected by intense exercise (lactic acidosis lowers bicarbonate transiently). Generally not affected by AAS. Low values with high anion gap may indicate kidney issues.

Calculated value (Na - Cl - HCO3) that helps identify causes of metabolic acidosis.

PED: Can be transiently elevated after intense training due to lactic acid accumulation. Persistent elevation warrants investigation. Not directly affected by AAS.

Essential mineral for bones, muscles, and nerve function.

PED: Generally stable on AAS. Adequate vitamin D and calcium intake important for bone health and muscle function.

Calcium level adjusted for albumin concentration. More accurate than total calcium when albumin is abnormal. Formula: Corrected Ca = Total Ca + 0.02 × (40 - Albumin).

PED: More clinically meaningful than uncorrected calcium when albumin is low (e.g., during illness or liver stress from oral AAS). If total calcium appears normal but albumin is low, corrected calcium may reveal true hypercalcemia. Generally stable on AAS.

Essential mineral involved in hundreds of enzymatic reactions.

PED: Many athletes are deficient despite adequate diet. Important for recovery, sleep, muscle function, and over 300 biochemical reactions. Heavy sweating depletes magnesium.

Mineral important for energy production and bone health.

PED: Generally not significantly affected by AAS or training. Part of the ATP energy system.