Supplement School

Can vitamins really reverse gray hair? While nutrient deficiencies and stress may influence when hair turns gray, scientific evidence shows that supplements alone are unlikely to restore natural hair color. Here’s what research actually says about gray hair and aging.

Can vitamin D cause constipation? While vitamin D is essential for bone and immune health, excessive supplementation may disrupt calcium balance and contribute to digestive discomfort. Here’s what research and clinical observations suggest.

Vitamin D supplements are safe when taken as directed. Learn who may need them, how much to take, possible side effects, and what to avoid combining with vitamin D.

 

Vitamin D and D3 are often used interchangeably, but they’re not exactly the same. Learn the key differences between vitamin D2 and D3, how each one works in the body, and which form may be more effective at raising vitamin D levels, plus dosage guidance, interactions, and what to consider before choosing a supplement.

Vitamin D is essential for strong bones, healthy muscles, immune support, and overall wellness — yet deficiency is incredibly common. This guide explains what vitamin D does, who needs supplements the most, recommended doses, and what the latest research says. If you’re low on sunlight or struggling to get enough through your diet, supplements are one of the most effective ways to support your health.

Struggling to get enough sunshine? 🌞 Vitamin D is key for bone, immune, and overall health. Learn how much you need, why deficiencies are so common, and the best way to supplement.