On GLP-1 Weight Loss Injections?

Thinking of using GLP-1 injections?

Or already on Mounjaro, Ozempic, or Wegovy?

Weight-loss injections can be effective. However, they also affect key organs and hormones.

That is why blood testing is essential – before, during, and after treatment.

At Marylebone Diagnostic Centre, we help patients stay safe while using GLP-1 therapies.

What Are GLP-1 Weight Loss Injections?

GLP-1 medications work by:

• Reducing appetite
• Slowing digestion
• Improving blood sugar control

They were first developed for diabetes. Now, they are widely used for weight loss.

But these drugs do not only affect fat. They influence hormones, liver function, kidneys, and fertility markers.

Why Blood Tests Matter on GLP-1 Injections

Many side effects are silent at first.

You may feel fine.
Your blood results may say otherwise.

Testing helps to:

• Detect liver stress early
• Monitor kidney strain
• Track hormone suppression
• Protect fertility potential
• Adjust treatment safely

Blood tests turn guesswork into informed decisions.

1. Hormone Testing – Often Overlooked, Very Important

Rapid weight loss can suppress hormones.

This includes:

• Testosterone
• Oestrogen
• SHBG
• Thyroid hormones

Low hormones may cause:

• Fatigue
• Low libido
• Mood changes
• Hair thinning
• Menstrual changes

Who should test hormones?

• Men on GLP-1 injections
• Women with cycle changes
• Anyone feeling unusually tired

2. Liver Function – GLP-1 Can Stress the Liver

The liver processes medications and fat loss by-products.

GLP-1 injections may cause:

• Raised ALT or AST
• Fatty liver changes
• Gallbladder issues

Liver tests we recommend:

• ALT
• AST
• ALP
• Bilirubin

Early detection prevents long-term damage.

3. Kidney Function – Dehydration Is a Risk

GLP-1 drugs often reduce thirst and food intake.

This can lead to:

• Dehydration
• Electrolyte imbalance
• Reduced kidney filtration

Key kidney markers:

• Creatinine
• eGFR
• Urea
• Electrolytes

Kidney issues may develop quietly.
Testing keeps you protected.

4. Fertility Markers – Especially Important for Men

This is rarely discussed.

Weight loss injections may affect:

• Testosterone levels
• SHBG balance
• Sperm health (indirectly)

Men trying to conceive should always test.

Women planning pregnancy should also monitor:

• Hormones
• Nutritional markers
• Thyroid function

Fertility preservation starts with awareness.

When Should You Test?

We recommend:

• Before starting GLP-1 injections
• At 8–12 weeks on treatment
• Every 3–6 months ongoing

Testing allows safe continuation – or timely adjustment.

Recommended GLP-1 Safety Panels at MDC

We often combine testing into one visit.

Common profiles include:

• GLP-1 Safety Blood Panel
• Liver Function Profile
• Kidney Function Profile
• Male or Female Hormone Profile
• Fertility & Reproductive Health Panel

Results are clear, fast, and clinician reviewed.

Why Choose Marylebone Diagnostic Centre?

• Results within 24 – 42 hours
• On-site consultant review
• Private suites
• Discreet and confidential care
• Central London location

We test proactively, not reactively.

Book Your GLP-1 Safety Blood Test Today

If you are on weight-loss injections, testing is not optional.
It is responsible care.

👉 Book your GLP-1 monitoring blood tests today
👉 Protect your health, hormones, and fertility

Clinic Information

Marylebone Diagnostic Centre
📍 73 Baker Street, London W1U 6RD
📞 +44 7495 970109
🕒 Monday–Saturday, 8:00–16:00
🚇 5-minute walk from Baker Street tube

Results within 24 – 42 hours, depending on the test