Monique Tello, MD, MPH | Bextera Nutrition

Physician & Contributing Medical Editor

Monique is a practicing physician at Massachusetts General Hospital and a clinical instructor at Harvard Medical School. Her work focuses on preventive health, lifestyle medicine and evidence-based approaches to long-term health.

Articles by Monique Tello, MD, MPH

Preventive Health Analysis

What Vitamin D Level Is Considered Low? Why 20 vs 30 ng/mL Is Still Debated

Vitamin D blood-test cutoffs are less universal than they look. Here is what 25(OH)D measures, how NIH interprets common levels, and why the old 30 ng/mL threshold changed.

Monique Tello, MD, MPH Read article →

Supplements Analysis

Vitamin D2 vs D3: Which Form Raises Vitamin D Levels Better?

Vitamin D2 and D3 both raise vitamin D status, but research shows important differences in how strongly and how long they affect blood levels.

Monique Tello, MD, MPH Read article →

Health Analysis

Vitamin D From Sun, Food or Supplements: What Each Source Can Actually Do

Sunlight, foods and supplements can all contribute to vitamin D status, but they are not interchangeable sources.

Monique Tello, MD, MPH Read article →

Article Analysis

Vitamin D: D2 vs D3, IU vs mcg and Supplement Specs

A specification-led vitamin D dossier covering D2 versus D3, IU and microgram conversion, reference intakes, safety context and the fields that matter when comparing supplements.

Monique Tello, MD, MPH Read article →