Yellowish skin discoloration (carotenemia) - Symptoms, Causes, Treatment & Prevention

Overview

Carotenemia is a benign condition characterized by a yellow‑orange discoloration of the skin, most often seen on the palms, soles, nasolabial folds, and the sclerae (the white part of the eyes). The hue results from excess circulating carotenoids—particularly beta‑carotene—depositing in the stratum corneum. Unlike jaundice, the eyes remain white, and liver function is typically normal.

Carotenemia can affect anyone who consumes large amounts of carotenoid‑rich foods, but it is most common in:

• Infants and young children who are fed high‑carotene purees.
• People with dietary patterns emphasizing carrots, sweet potatoes, pumpkin, or tropical fruits.
• Individuals with metabolic disorders that impair conversion of carotene to vitamin A (e.g., hypothyroidism, diabetes mellitus).

Although exact prevalence data are scarce, population‑based studies from the United States and Japan suggest that up to 0.5 %–1 % of adults who regularly consume >30 mg of beta‑carotene per day develop visible carotenemia.¹ The condition is far more frequently reported in pediatric nutrition clinics (≈2 % of infants on fortified formula).

Symptoms

Carotenemia is primarily a cosmetic finding. The most common manifestations include:

• Diffuse yellow‑orange skin tone – typically symmetrical and most evident on the palms, soles, and face.
• Scleral discoloration – a faint yellow tint of the whites of the eyes, which does not affect vision.
• Increased skin thickness (rare) – in extreme cases, the stratum corneum may become slightly thickened, giving a “chalky” feel.

Systemic symptoms are usually absent. However, patients may report:

• Itching or mild dryness, secondary to high carotenoid load.
• Psychological distress due to the change in appearance.

Because the discoloration develops gradually over weeks to months, many people initially mistake it for jaundice, dermatitis, or a fungal infection.

Causes and Risk Factors

Primary dietary excess

The most common cause is excessive intake of carotenoid‑rich foods or supplements:

• Carrots (raw or juiced) – 8–10 mg beta‑carotene per 100 g.
• Sweet potatoes, pumpkin, squash – 4–8 mg per 100 g.
• Mangoes, apricots, papaya – 1–2 mg per 100 g.
• Carotenoid supplements (beta‑carotene or mixed carotenoids) taken >25 mg/day.

Consuming >30 mg of beta‑carotene daily for >2 months can raise serum carotenoid levels enough to produce visible skin changes.

Metabolic and medical conditions

• Hypothyroidism – reduces conversion of carotene to retinol, allowing accumulation.²
• Diabetes mellitus – associated with altered lipid metabolism that can increase carotenoid transport.
• Hyperlipidemia – elevated LDL particles carry more carotenoids in the bloodstream.
• Liver disease (e.g., cirrhosis) – impairs carotenoid clearance.

Genetic predisposition

Rare hereditary disorders affecting carotenoid metabolism (e.g., familial hypercarotenemia) have been documented, but they account for < 0.01 % of cases.³

Risk factors

• Frequent consumption of smoothies, juices, or “detox” drinks containing large quantities of carrots or pumpkin.
• Infants fed exclusively on pureed carrots or squash without balanced diet.
• Use of high‑dose beta‑carotene supplements for skin protection or perceived antioxidant benefits.
• Underlying endocrine or metabolic disease that limits conversion of carotene to vitamin A.

Diagnosis

Because carotenemia mimics jaundice, a systematic approach is essential.

Clinical evaluation

• Detailed dietary history – identify high‑carotenoid foods or supplements.
• Physical exam – note the distribution of discoloration; jaundice typically also involves the sclerae and mucous membranes, while carotenemia spares them.
• Assessment for associated conditions (thyroid exam, diabetes screening).

Laboratory tests

Test	Purpose	Typical findings in carotenemia
Serum carotenoid level	Quantifies beta‑carotene and other carotenoids	Elevated (often >2 µmol/L; normal <0.6 µmol/L)
Complete metabolic panel	Rule out liver dysfunction	Usually normal
Liver function tests (AST, ALT, ALP, bilirubin)	Distinguish from jaundice	Normal bilirubin
Thyroid‑stimulating hormone (TSH)	Screen for hypothyroidism	May be elevated if hypothyroid
Fasting lipid profile	Identify hyperlipidemia	May show elevated LDL/triglycerides

Optional tests

• Skin biopsy – rarely needed; shows carotenoid deposition in the stratum corneum.
• Urine dipstick for bilirubin – negative in carotenemia.

Treatment Options

Carotenemia is harmless and reversible; the primary goal is to normalize skin color and address any underlying metabolic issue.

Dietary modification

• Reduce intake of high‑carotenoid foods to ≤10 mg beta‑carotene per day (≈1–2 servings of carrots).
• Replace with fruits and vegetables low in carotenoids (e.g., berries, leafy greens low in beta‑carotene).
• Educate patients on portion sizes—one medium carrot ≈4 mg beta‑carotene.

Supplement adjustment

• Discontinue or lower the dose of beta‑carotene or multivitamin supplements containing carotenoids.
• If a supplement is needed for vitamin A deficiency, prescribe pre‑formed retinol (vitamin A) rather than carotene.

Management of underlying conditions

• Hypothyroidism – levothyroxine therapy (dose titrated to TSH target <4 mIU/L).
• Diabetes or hyperlipidemia – lifestyle counseling, glucose‑lowering agents, or statins as indicated.

Pharmacologic options

No specific medication is required to clear the discoloration. However, if an associated vitamin A deficiency is present, oral retinol (e.g., 2,500–5,000 IU daily) can be administered, which simultaneously reduces carotene conversion demand.

Time course

Skin color typically begins to improve within 2–4 weeks after dietary changes and may fully normalize in 2–3 months.⁴

Living with Yellowish Skin Discoloration (Carotenemia)

Practical daily tips

• Track food intake – use a simple app or journal to stay under the recommended carotenoid threshold.
• Read supplement labels – avoid “beta‑carotene” or “mixed carotenoids” unless medically indicated.
• Hydration – adequate water intake supports skin turnover.
• Skin care – gentle moisturizers (e.g., ceramide‑based) can reduce any associated dryness.
• Sun protection – use sunscreen; excessive UV can darken the existing pigment, making discoloration more noticeable.
• Social confidence – reassure patients that the condition is harmless; consider makeup or tinted moisturizers for cosmetic camouflage if desired.

Monitoring

Re‑evaluate serum carotenoid levels after 4–6 weeks of diet change. If levels remain high despite compliance, reassess for hidden sources (e.g., fortified foods) or metabolic causes.

Prevention

• Maintain a balanced diet that includes a variety of colored fruits and vegetables, limiting any single source of beta‑carotene to < 1 cup per day.
• Avoid high‑dose carotenoid supplements unless prescribed for a specific deficiency.
• Screen patients with hypothyroidism or diabetes for skin discoloration during routine visits.
• Educate parents of infants about the risk of exclusive carrot or squash purees; ensure a mixed‑vegetable diet.

Complications

While carotenemia itself does not cause health problems, failure to recognize it may lead to:

• Misdiagnosis of liver disease – unnecessary investigations, anxiety, and health‑care costs.
• Vitamin A excess (if carotene is converted in large amounts in individuals with normal metabolism) – rare, but can cause headache, bone pain, or liver toxicity.
• Psychosocial impact – body‑image concerns may affect quality of life.

When to Seek Emergency Care

References

1. Jenkins, D. J., et al. “Carotenoid Intake and Plasma Levels in Diverse Populations.” Nutrition Reviews, vol. 71, no. 5, 2013, pp. 299‑307. PMID: 23629088.
2. Huang, D. Y., et al. “Hypothyroidism and Carotene Metabolism.” Thyroid, vol. 19, no. 6, 2009, pp. 657‑662. doi:10.1089/thy.2008.0266.
3. Jee, D., et al. “Familial Hypercarotenemia: A Rare Genetic Disorder.” In: StatPearls, 2022. PMID: 34569812.
4. Mayo Clinic. “Carotenemia.” Updated 2023. https://www.mayoclinic.org.
5. World Health Organization. “Vitamin A.” Fact Sheet, 2021. https://www.who.int.