Triglycerides
The optimal range for Triglycerides (Serum Triglycerides) is commonly cited as <100 mg/dL · ideal <80 mg/dL fasting, tighter than the standard lab reference range of <150 mg/dL. Circulating fat in transit - among the most diet-responsive lipid markers. Drops fast on GLP-1s and low-carb diets.
How Triglycerides ranges relate
The standard lab range vs the optimization-focused target. Illustrative trajectory shows what a 12-week improvement pattern looks like — not real user data.
What Triglycerides Measures
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.
What Affects This Biomarker
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.
In the Context of Peptide Protocols
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.
Peptides That Commonly Move Triglycerides
Conditions That Track Triglycerides
Frequently Asked Questions
What does Triglycerides measure?
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.
What is the optimal range for Triglycerides?
The optimal range for Triglycerides is commonly cited as <100 mg/dL · ideal <80 mg/dL fasting. The standard lab reference range is <150 mg/dL.
What affects Triglycerides levels?
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.
Where This Fits in Your Panel
Triglycerides is one marker on a fuller panel. The Peptide Blood Work Checklist lays out the complete baseline panel, what to add by protocol type, and when to retest.
See the full blood work checklist →Upload any lab PDF and MyProtocolStack maps your values to Triglycerides and 40+ other biomarkers. StackAI interprets the trend in context of your protocol.
Start tracking →Last reviewed: June 2026
Informational only - not medical advice. Reference ranges vary by lab and individual context. Work with a licensed provider to interpret your specific results.