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6 Sneaky Deficiencies That Could ‘Silently’ Be Contributing To Hair Loss

August 23, 2025 by Lisa Cupido

 
Pexels / Towfiqu barbhuiya

Hair loss isn’t always just about genetics, hormones, or stress—it can also be your body’s way of signaling that something is missing from your diet. Vitamins and minerals play a big role in keeping hair strong, shiny, and healthy, and even a slight deficiency can sometimes show up first in your hair. Certain nutrients are tied to hair health, and when your body isn’t getting enough of them, strands may become weaker, thinner, or fall out more easily.

If you’ve been noticing more shedding than usual, it may be worth checking in with your doctor to see whether nutrient levels could be part of the picture. A blood test can often reveal if deficiencies could be contributing to hair loss, and your healthcare provider can help you decide if dietary changes or supplements could make a difference. Always check with your doctor first, because taking a bunch of supplements that you don’t need can be useless or even backfire, but for your own knowledge, these six deficiencies are sometimes linked to hair loss.

1. Biotin

Biotin, which is also referred to as vitamin B7, helps your body turn food into energy and plays a key role in producing keratin, the protein that makes up your hair. When biotin levels are low, hair can become brittle, weak, and more prone to breakage, which may lead to noticeable thinning or hair loss over time.

2. Iron

Iron is key for carrying oxygen through your blood to your cells, including the cells that stimulate hair growth. Without enough iron, the body prioritizes oxygen for vital functions, leaving hair follicles undernourished. This can lead to increased shedding and diffuse thinning, especially in women.

3. Folic Acid

Folic acid supports the creation of red blood cells and helps tissues grow and repair—including the tissues that form your hair. A deficiency can slow down cell turnover in hair follicles, making strands weaker and potentially leading to hair loss.

4. Vitamin E

Vitamin E is a powerful antioxidant that helps protect hair follicles from damage caused by free radicals and oxidative stress. Not getting enough can compromise scalp health, reduce blood circulation to follicles, and contribute to thinning hair.

5. Vitamin C

Vitamin C boosts collagen production, which strengthens hair structure, and also helps your body absorb iron properly. A lack of vitamin C can weaken hair shafts, slow growth, and even make iron deficiency-related hair loss more likely.

6. Zinc

Zinc plays an important role in hair tissue growth and repair and helps keep the oil glands around hair follicles working properly. If zinc levels drop too low, it can disrupt the hair growth cycle, leading to shedding, slower regrowth, and thinning.

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