Circulating fat in transit — among the most diet-responsive lipid markers. Drops fast on GLP-1s and low-carb diets.
Triglycerides are the storage form of fatty acids — circulating in VLDL particles between meals and packaged into chylomicrons after eating. Fasting triglycerides reflect overall metabolic health: insulin resistance, hepatic fat, dietary carbohydrate load, and alcohol intake all drive elevated levels.
Very high triglycerides (>500) carry pancreatitis risk and warrant urgent attention. Modestly elevated TG (150–300) is more about cardiovascular and metabolic risk signaling — often the first lipid marker to budge on dietary or pharmacologic intervention.
Triglycerides are influenced by: dietary refined carbohydrate (especially fructose), alcohol intake (very strong driver), insulin resistance, body fat, recent meals (must fast 12+ hours for accurate read), exercise (lowers), omega-3 fatty acids (lower), and pharmacologic agents — fibrates lower; niacin lowers; GLP-1s and SGLT2is lower; estrogens raise; isotretinoin raises significantly.
On GLP-1s (semaglutide, tirzepatide, retatrutide), triglycerides typically drop 30–50% — often the most dramatic lipid change. On low-carb dietary protocols, expect rapid drops. The Triglycerides/HDL ratio (target <2) is a strong proxy for insulin resistance and small-dense LDL particle pattern. Always draw fasted (12+ hours) for valid result.
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Start tracking →Informational only — not medical advice. Reference ranges vary by lab and individual context. Work with a licensed provider to interpret your specific results.