From the Research
For nail thinning with a history of treated hypothyroidism, I recommend starting with biotin supplements at 2.5-5 mg daily for at least 3-6 months, as this B vitamin helps strengthen keratin structure in nails. According to a study published in 2020 1, nail plate brittleness is a common complaint affecting up to 20% of the population, and biotin supplementation has been reported to be useful in managing idiopathic nail fragility. Additionally, a study published in 2022 2 found that nail changes, including thinning, are associated with hypothyroidism, and although your thyroid levels are now normal, previously untreated hypothyroidism may have contributed to nail thinning.
To further support nail health, apply a nail strengthener containing calcium, keratin, or tea tree oil every few days, and moisturize your nails and cuticles daily with jojoba or vitamin E oil. Protect your hands with gloves when doing household chores involving water or chemicals. Maintain a balanced diet rich in protein, zinc, iron, and vitamins A, C, and E to support nail health. If no improvement occurs after 3-6 months of these interventions, consult a dermatologist as persistent nail thinning could indicate other nutritional deficiencies, anemia, or dermatological conditions requiring specific treatment. A study published in 2020 3 also highlights the importance of biotin in dermatology, and its role in gluconeogenesis, fatty acid synthesis, and amino acid catabolism.
Some key points to consider:
- Nail thinning can be a persistent issue even after hypothyroidism treatment, and may require additional interventions to support nail health.
- Biotin supplementation has been shown to be effective in managing nail fragility and brittleness.
- A balanced diet and proper nail care are essential for supporting nail health and preventing further damage.
- If no improvement occurs after 3-6 months of treatment, consult a dermatologist to rule out other underlying conditions.