Do I need blood work before starting Ozempic or Wegovy?

Yes, baseline blood work is strongly recommended before starting any GLP-1 medication. Most prescribers require at least HbA1c, kidney function, and liver enzymes. A full panel including CBC, CMP, lipids, and TSH provides the complete picture needed for safe monitoring.

What blood tests show if semaglutide is working?

The best markers are HbA1c (should decrease), fasting glucose (should stabilize), lipid panel (LDL and triglycerides should improve), and liver enzymes (often improve as fatty liver resolves). Weight is obvious, but blood markers prove metabolic improvements beyond the scale.

Can GLP-1 medications affect my thyroid?

GLP-1 medications carry a boxed warning about thyroid C-cell tumors observed in rodent studies. While this hasn

How often should I get blood work on semaglutide?

Most providers recommend: baseline before starting, 4-8 weeks after starting (kidney function focus), 3-6 months (full panel), then every 6-12 months for ongoing monitoring. More frequent testing may be needed if you have diabetes or kidney concerns.

Should I fast before GLP-1 blood tests?

Yes, 8-12 hours fasting is recommended for accurate lipid panel and glucose readings. However, CBC and many other tests don

What if my kidney function drops on GLP-1?

Mild, temporary kidney function changes can occur due to dehydration from GLP-1 side effects (nausea, reduced appetite). Stay well-hydrated. If eGFR drops significantly or creatinine rises, contact your prescriber. Dose adjustment or additional monitoring may be needed.

PeptideKey Research Library

Semaglutide Blood Test: Are You Tracking the Right Markers?

Explore GLP-1 Semaglutide blood testing protocols. Understand its research applications, potential benefits, safety considerations, and monitoring guidelines. [2026]

This research guide is part of PeptideKey's evidence-based peptide research library covering 100+ compounds with lab-verified purity data.