Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

What is the difference between magnesium citrate and magnesium glycinate?

Nov 22, 2025 · 11 min read

Magnesium citrate is more likely to loosen stools and help constipation, while magnesium glycinate is typically better tolerated and is commonly used for sleep and daily supplementation. Here is the evidence-based breakdown of how citrate and glycinate affect your digestion, sleep, and absorption differently. “Patients often grab the first magnesium bottle they see, not realizing ...

Why do energy drinks make me tired? The crash mechanics and the best cutoff before bed

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 21, 2025 · 14 min read

Energy drinks can make you tired because caffeine and sugar can create a short-lived spike followed by a “crash,” and caffeine can also disrupt sleep long after the can is empty. If you keep asking “why do energy drinks make me sleepy,” the answer is often a mix of brain chemistry, blood sugar swings, hydration, ...

Moobs or gynecomastia? How to get rid of man boobs with the right diagnosis

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 21, 2025 · 15 min read

You can get rid of man boobs by first confirming whether you have excess chest fat, true gynecomastia, or a combination, then matching the fix to the cause. The fastest path is usually a smart fat loss plan plus full body strength training, but glandular breast tissue often requires a medical approach. “When a guy ...

Red light therapy for weight loss in men: What the evidence says about rrt and fat loss

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 21, 2025 · 14 min read

Red light therapy for weight loss may reduce waist and body measurements in small human studies, but the evidence is limited and the strongest results come from clinic grade low level laser devices, not typical home panels. If you are considering rrt for weight loss, here is how to separate real data from marketing and ...

The truth about energy drinks without sucralose: What to know before you crack a can

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 20, 2025 · 14 min read

Energy drinks without sucralose can reduce your exposure to one common artificial sweetener, but they are not automatically “healthy.” The real make or break factors are caffeine dose, added sugar, stacked stimulants like guarana, and whether the drink disrupts your sleep, gut, or blood pressure. Here is the truth about energy drinks without sucralose and ...