Research in the American Journal of Clinical Nutrition shows how vitamin D intake and status relate to bone outcomes, large trials, and safe dosing.

AJCN studies on red meat link higher intake—especially processed—to raised risk markers, while lean, modest portions can fit balanced patterns.

Research on green tea in AJCN reports modest effects on energy use, weight control, and heart markers, with safety tied to dose and form.

The AJCN glycemic index chart groups foods by GI and GL so you can scan low, medium, and high options fast.

The AJCN glycemic index work ranks carbohydrate foods by blood-glucose response and supplies tested tables to guide choices and glycemic load math.

AJCN research finds eggs can fit healthy eating; one large egg packs ~6 g protein and ~186 mg cholesterol, with overall diet shaping risk.

Research in this journal ties diet patterns to lower A1C and reduced type 2 diabetes risk.

Research in this journal links moderate coffee intake with lower diabetes and heart risk, while late caffeine can disrupt sleep.

AJCN breakfast studies suggest protein and fiber at the first meal improve satiety and diet quality without guaranteed weight loss.

Research in the American Journal of Clinical Nutrition links body fat percentage to health risk and explains how to measure it with care.