Patient's Query
Hello doctor,
I am 30 and have been facing acne and pigmentation for the last year. My recent blood tests showed vitamin D deficiency and borderline thyroid (TSH 5.2).
I am using OTC creams, but not much improvement. Please give your opinions on:
Could underlying hormonal issues be worsening the skin?
Do you think prescription tretinoin or chemical peels are more effective in the long term?
Also, how safe is it to combine multiple products like vitamin C serum, sunscreens, and retinoids daily?
Can diet changes like reducing dairy or oily foods really improve acne, or is it mostly genetic and hormonal?
Kindly suggest.
Hello,
Welcome to icliniq.com.
I understand your concern.
Acne and pigmentation can indeed be influenced by underlying hormonal and metabolic factors, and in your case, both vitamin D deficiency and a slightly elevated TSH (thyroid-stimulating hormone) could contribute indirectly.
Low vitamin D can affect immunity and inflammation, while borderline thyroid imbalance can sometimes worsen skin texture, dryness, or make pigmentation harder to treat.
Since your acne has persisted for over a year despite over-the-counter creams, prescription treatments like topical Tretinoin are often more effective in the long term as they improve both acne and pigmentation by increasing skin cell turnover and stimulating collagen.
Chemical peels performed under a dermatologist’s supervision can also help fade pigmentation and smooth acne scars, but they are usually considered as an add-on once active breakouts are better controlled.
When it comes to skincare routines, combining vitamin C serum in the morning with sunscreen is safe and can help brighten pigmentation and protect against sun damage, while retinoids such as Tretinoin are best reserved for nighttime use.
They should not be applied at the same time as vitamin C, but can be part of the same daily routine if separated by morning and evening. It is important to start Tretinoin gradually and use adequate moisturizer and sunscreen to minimize irritation.
Dietary changes may also play a role, though the impact varies from person to person. Some studies suggest that reducing high glycemic index foods, sugary items, and dairy products can modestly improve acne in certain individuals, while oily or fried foods are less clearly linked.
Genetics and hormonal balance, particularly androgens and insulin resistance, are often stronger drivers of persistent acne than diet alone.
Given your history and borderline thyroid, it would be worthwhile to review your hormonal profile with your physician and also address the vitamin D deficiency.
With a combination of medical therapy, prescription skincare, sun protection, and targeted lifestyle adjustments, most patients see meaningful improvement in both acne and pigmentation over time.
I hope this helps.
Thank you.
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Answered byDr. Ashraf Ghani
Medically reviewed byiCliniq medical review team
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