6 Skin and Hair Facts Worth Knowing — Small Details That Matter

When iron and vitamin D matter for hair loss, why tinted sunscreen helps melasma, how panthenol fits into lip care, and when a skin spot needs checking.

Skin & Hair · 3 min read · October 14, 2026

Written and medically reviewed by Dr. Yousef Abo Zarad · German board-certified dermatologist · Last reviewed: October 2026

The short answer

A hair supplement, sunscreen or lip balm may seem straightforward, but choosing and using it correctly makes a difference. These six practical facts explain when a tip helps, how to apply it, and when a proper skin examination is more important than another product.

1. Hair loss: What to do before iron or vitamin D?

Iron or vitamin D deficiency may be relevant when assessing hair shedding, particularly in women. But buying supplements without identifying the cause will not treat every type of hair loss.1

  • Start with the history and scalp examination. Ferritin and vitamin D tests are selected when clinically indicated.
  • Correct confirmed deficiencies with an appropriate dose and follow-up.
  • If the hair part gradually widens, assess female pattern hair loss: supplements alone will not replace its treatment.
Do not start high-dose vitamin D or iron merely because hair is shedding. More: Hair loss in women.

2. Melasma: Why choose a tinted sunscreen?

Visible light as well as ultraviolet light can aggravate melasma. A tinted sunscreen containing iron oxides offers additional visible-light protection, which is useful when pigmentation is the main concern.2

  • Choose broad-spectrum UVA and UVB protection, at least SPF 30, preferably SPF 50+.
  • Look for iron oxides on the ingredient list; a tinted finish alone does not establish protective performance.
  • Use enough sunscreen every day and reapply when spending time outdoors.
Consistency and appropriate protection matter more than the brand. See the sunscreen selection guide.

3. Dry skin: Is drinking water enough?

Adequate water intake supports health, but it does not replace moisturizer when the skin barrier is impaired. Dry skin loses moisture more easily and needs topical barrier support.3

  • Choose a suitable moisturizer containing ingredients such as glycerin or ceramides.
  • Apply it after washing or showering, while the skin is still slightly damp.
  • Avoid excessively hot water, harsh cleansing and unnecessary exfoliation on cracked or irritated skin.
If dryness persists with redness, itching or fissures, eczema or another skin condition may need assessment.

4. Antiperspirant: Why apply it before bed?

An antiperspirant is not the same as a deodorant. Aluminum salts in many antiperspirants reduce sweat production at the skin surface, whereas deodorants primarily address odor.4

  • Apply antiperspirant to completely dry skin, preferably at night for stronger products used against excessive sweating.
  • Sweating is usually lower at night, helping the product work and lowering the chance of irritation.
  • Some treatment-strength products should be washed off in the morning according to their directions. Avoid freshly shaved or irritated skin.
Persistent excessive sweating has other treatment options, which a dermatologist can assess.

5. Chapped lips: Where does panthenol fit?

A scented balm can make already chapped lips worse. Fragrances, flavors, menthol and camphor can trigger irritation.5

Panthenol (provitamin B5) is a reasonable choice in a simple, fragrance-free lip product. Skin-barrier studies support its moisturizing and repair effects, although that does not establish that every panthenol formula treats every cause of cheilitis.6

  • Choose a fragrance-free lip product containing panthenol, with no irritating flavors.
  • Reapply as needed during the day and before bed.
  • For pronounced dryness, plain white petrolatum can provide extra occlusion; it complements rather than replaces the panthenol option.
  • Avoid licking the lips or peeling off loose skin.
Ongoing cracking or inflammation despite simple care deserves examination.

6. Skin cancer: Why not wait for a black raised mole?

Skin cancer does not always look like a large black mole. Basal cell carcinoma can appear as a pink or pearly bump, a shiny lesion, or a sore that does not heal.7

Melanoma may start as a flat spot that changes over time, but it may also be raised, and it is not always black.8

  • Seek assessment if a spot grows or changes in shape, color or border.
  • Do not ignore a lesion that bleeds, ulcerates or repeatedly fails to heal.
  • Have an unusual spot checked even when it is pink or flat, especially if it differs from other moles.
A picture or the surface shape alone cannot confirm or exclude skin cancer. Dermoscopy or biopsy may be needed.

Medical Evidence