Hair loss after weight loss? Here's what you need to know
Weight loss can be a life-changing journey - bringing improved health, confidence, and energy. But for many people, there’s an unexpected side effect that can feel unsettling and that's hair loss.
If you've noticed more hair in your brush or shower drain after shedding a few kilos, you're not alone. We unpack why it happens, what it means, and how you can support your hair (and yourself) through the process.
Why Does Weight Loss Cause Hair Loss?
Hair loss related to weight loss is often due to a condition called telogen effluvium. It sounds technical, but it simply means your body has shifted more hair follicles into a “resting” phase -causing noticeable shedding a few months after a trigger like rapid weight loss.
Here’s what might be happening under the surface:
1. Rapid or Extreme Weight Loss
Sudden drops in weight - especially from crash diets or strict meal plans - can stress the body. And when your body is under stress, it prioritises vital functions over extras like growing hair.
2. Nutrient Deficiencies
Your hair needs a wide range of nutrients to stay healthy. Losing weight without enough protein, iron, zinc, biotin, or vitamin D can lead to shedding or thinning hair.
3. Hormonal Shifts
Weight loss can influence hormone levels, especially estrogen and thyroid hormones - both key players in the hair growth cycle.
4. Stress (Physical or Emotional)
Even positive changes like weight loss can place stress on the body. Hair shedding often shows up 2-3 months after a major change or stressor.
What Can You Do About It?
The good news? This kind of hair loss is usually temporary. Most people notice regrowth within 6 to 12 months, especially when they nourish their bodies and scalp.
Here are some ways to support healthy regrowth:
Eat a Hair-Friendly Diet
Focus on whole, nutrient-dense foods:
- Protein (eggs, tofu, lean meats)
- Iron (spinach, legumes, red meat)
- Omega-3s (salmon, chia seeds)
- Vitamins like B12, D, and biotin
Consider Supplements
If you're not getting enough from food - or if you're on a restricted diet - consider a multivitamin or a supplement designed for hair health. (Talk to a Trichologist or your doctor first.)
Be Kind to Your Scalp
Avoid harsh shampoos or heavy heat styling. Try gentle, alcohol-free scalp stimulants, or nourishing treatments that encourage a healthy scalp environment.
Consult a Professional
If shedding is heavy or doesn't slow down after a few months, speak with a Trichologist (hair/scalp specialist) or your GP. They can check for conditions like anaemia or thyroid imbalance.
You’re Not Alone
Hair loss during or after weight loss can feel scary, but it’s your body’s way of asking for care - not punishment.
Your hair reflects your overall wellbeing. Take it as a gentle reminder to nourish yourself fully, not just focus on the numbers on a scale.
