GLP-1 Advisor | One Day MD

Disclosures: This article is educational and is not medical advice. Some links are affiliate links (The Wellness Company, referral code ONEDAYMD, and Amazon Associates); we may earn a commission at no extra cost to you. Affiliate relationships do not change the evidence we report. See the full medical disclaimer below. GLP-1 Advisor SERIES Evidence Update By Dr. Frank Yap , MD · Published September 29, 2026 · Updated October 3, 2026 · Evidence reviewed through early October 2026 Quick Answer: Do GLP-1 drugs cause nutrient deficiencies? GLP-1 drugs such as semaglutide and tirzepatide are not known to drain vitamins directly. Nutrient risk rises mainly because appetite suppression, nausea, vomiting and rapid weight loss reduce intake of protein, vitamin D, iron, calcium and B vitamins. The best-supported approach is food first, protein plus resi...