For Clinicians & Allied Health Professionals

Indirect calorimetry at Thames Diagnostics provides objective metabolic data so your calorie prescriptions are accurate from day one — improving safety, adherence, and outcomes.

1) Establish the Right Baseline Before Starting

Start with a measured resting metabolic rate (RMR) before prescribing calories. A precise baseline prevents false starts, frustration, and early drop-off when predicted targets miss the mark.

2) Objective Data to Personalize Caloric Prescriptions

Predictive equations (Mifflin–St Jeor, Harris–Benedict) can be off by ±15–30% in women, obesity, and post-diet states. Indirect calorimetry gives the actual RMR, enabling physiologically realistic targets.

3) Detect Metabolic Adaptation and “Yo-Yo” Suppression

After significant weight loss or repeated dieting, energy expenditure can be suppressed. Testing identifies this early so you can adjust pace and nutrition to minimize plateaus and relapse risk.

4) Build Trust Through Measurable Progress

Re-test every 3–6 months to quantify metabolic recovery or efficiency gains. Objective trends reinforce adherence, protect your credibility, and align care teams (MD/NP + RD).

• Start of a new weight loss program  (set a safe, accurate baseline)
• Plateau despite adherence
• ≥10% total body-weight loss or maintenance phase
• Post-bariatric (≥12 months) or complex yo-yo history
• Unusual fatigue/low intake tolerance relative to predicted needs

• Same-day report: measured RMR (kcal/day), Metabolic suppression screen,  predicted vs measured comparison, suggested ranges for deficit/maintenance, retest interval (3–6 months)
• Patient-friendly summary to streamline counselling and shared decision-making.

• Time & workflow: 20–30 minutes test; standardized resting protocol; minimal admin.
• Governance: PIPEDA-aligned processes, informed consent, calibrated equipment, validated methodology.
• Coordination: Optional consult to review results; rapid turnaround; secure delivery.
• Positioning: Diagnostic support for your medical care — not a conflicting commercial program. Founded on the principals & practices of evidenced based medicine, we provide patients with accurate, precise metabolic testing (Resting Metabolic Rate or Basal Metabolic Rate) using FDA certified indirect calorimetry technology. Patients paying out of pocket or covered by their extended health care plan receive a clear and concise report of the results. 

1. Secure text message to us. Text patient's name & email to us at 778.851.0641.

2. Secure online form (see below).

Please inform your patient or client that diagnostic metabolic screening is not yet covered by BC's MSP.  However, patients with extended health insurance are often fully covered for this test when prescribed by a qualified medical practitioner.