Kualitas bukti 4.63/5
Skor tinjauan delapan dimensi terhadap rubrik kualitas . Setiap dimensi dinilai 1–5.
- D1 Dasar sumber
- 4/5
- D2 Otoritas sumber
- 5/5
- D3 Aritmetika
- 4/5
- D4 Ketidakpastian
- 4/5
- D5 Cakupan
- 5/5
- D6 Prosa
- 5/5
- D7 Kejujuran persepsi
- 5/5
- D8 Kelengkapan peringatan
- 5/5
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- Faktor Anda
≈ Sama mungkinnya dengan
Dipersepsikan
Kebanyakan orang yang pernah mendengar tentang kekurangan vitamin D mengaitkannya dengan penyakit rakhitis pada anak-anak yatim di era Dickens, bukan dengan diri mereka sendiri. Orang dewasa modern yang banyak menghabiskan waktu di dalam ruangan mungkin samar-samar tahu bahwa sinar matahari berperan dan berasumsi bahwa sesekali berjalan ke tempat parkir sudah merupakan paparan UV yang memadai. Pemasaran suplemen telah sedikit meningkatkan kesadaran, tetapi intuisi default-nya adalah bahwa kekurangan adalah masalah khusus bagi lansia yang tidak bisa keluar rumah atau mereka yang tinggal di kawasan sangat utara — bukan sesuatu yang memengaruhi seperempat hingga sepertiga orang dewasa AS biasa.
Perkiraan kasar: ~10-15 % kemungkinan mengalami kekurangan tanpa suplemen
Sumber: intuisi redaksi, bukan hasil survei
Aktual
~24 % prevalensi serum 25(OH)D <20 ng/mL di antara orang dewasa AS (NHANES 2001-2018)
Orang dewasa AS berusia 20+ dalam survei NHANES (gabungan 2001-2018)
Tampilkan perhitungan
Data gabungan NHANES 2001-2018 (n = 71.685) menemukan 2,6 % kekurangan berat (<12 ng/mL) dan 22 % kekurangan sedang (12-19 ng/mL) pada penampang mana pun, dengan total prevalensi titik ~24,6 % serum 25(OH)D <20 ng/mL. Di antara pengguna non-suplemen, prevalensinya lebih tinggi — Forrest & Stuhldreher (2011) menemukan 41,6 % kekurangan (<20 ng/mL) dalam keseluruhan data NHANES 2005-2006, dengan orang kulit hitam non-Hispanik pada 82,1 %. Namun, analisis yang lebih lama itu menggunakan standarisasi uji yang kurang canggih. Laporan CDC 2011-2014 menemukan ~23 % berisiko kekurangan atau ketidakcukupan digabungkan. Untuk probabilitas seumur hidup: status vitamin D berfluktuasi secara musiman dan seiring usia. Seorang dewasa non-suplemen yang mengalami musim dingin, menua melewati 65 tahun, atau bertambah berat badan akan turun di bawah 20 ng/mL pada suatu saat dengan probabilitas lebih tinggi daripada potret penampang. Menerapkan penyesuaian kumulatif yang moderat (~1,4x dari laju penampang ~24 %) menghasilkan ~35 %, mencerminkan bahwa palung musiman, penyakit, kehamilan, dan penuaan menciptakan episode kekurangan berulang selama horizon dewasa 59 tahun. Ini konservatif; beberapa analisis menyarankan >40 % orang dewasa non-suplemen mengalami kekurangan pada saat tertentu.
Catatan: «Kekurangan vitamin D» berarti hal yang berbeda tergantung di mana ambang batas …
«Kekurangan vitamin D» berarti hal yang berbeda tergantung di mana ambang batas ditarik. IOM menggunakan <12 ng/mL (30 nmol/L) untuk risiko kekurangan nyata; Endocrine Society secara historis menggunakan <20 ng/mL (50 nmol/L); beberapa praktisi memperlakukan <30 ng/mL sebagai «ketidakcukupan». Pada batas IOM, hanya ~5 % populasi AS yang memenuhi syarat. Pada batas Endocrine Society, ~24 %. Pada garis ketidakcukupan, ~65 %. Entri ini menggunakan ambang batas <20 ng/mL dari Endocrine Society sebagai batas yang bermakna secara klinis, karena sesuai dengan tingkat di bawah mana hormon paratiroid naik dan metabolisme tulang terbukti terganggu. Ketidakcukupan subklinis (20-29 ng/mL) jauh lebih umum tetapi konsekuensi klinisnya masih diperdebatkan — pedoman Endocrine Society 2024 secara khusus mundur dari skrining populasi rutin. Garis lintang, musim, warna kulit, komposisi tubuh, dan gaya hidup dalam ruangan berinteraksi secara multiplikatif, membuat rata-rata populasi menjadi prediktor yang sangat buruk untuk status individu.
Risiko terkait
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Pilih penantang
NHANES data spanning 2001-2018 found 24.6% of US adults with serum 25(OH)D below 20 ng/mL at any given cross-section — the Endocrine Society’s threshold for deficiency. Add the “insufficient” bracket (20-29 ng/mL) and nearly two-thirds fall short. Among non-supplement users, who constitute roughly 72% of the adult population, the snapshot prevalence is higher still: Forrest and Stuhldreher reported 41.6% deficiency in NHANES 2005-2006 data using an older assay. Over a full adult lifetime, the probability that a non-supplementing individual dips below the deficiency line at least once — during a sedentary winter, an illness, a pregnancy, or simply ageing — lands around 35%. That is not a niche condition. It is the nutritional equivalent of a coin flip with a thumb on the scale.
The disparity story is where the numbers get uncomfortable. Non-Hispanic Black Americans showed deficiency rates of 82.1% in the Forrest analysis and 17.5% even at the stricter IOM cutoff — an eight-fold gap over non-Hispanic Whites at the same threshold. Melanin is an effective UV filter: darker skin synthesises up to 99% less vitamin D3 per unit of sunlight. Latitude compounds the problem. Above the 37th parallel (roughly San Francisco to Richmond, Virginia), winter UVB is too weak to drive meaningful cutaneous synthesis regardless of skin colour. The result is that a dark-skinned person living in Chicago and working indoors is navigating a near-certain deficiency without supplementation, while a fair-skinned outdoor worker in Miami may never think about it.
None of this means the average deficient adult is walking around with rickets. Clinical consequences of subclinical deficiency — the kind most people have — remain genuinely contested. The 2024 Endocrine Society guideline conspicuously declined to recommend routine population screening, suggesting empiric supplementation only for those over 75, pregnant individuals, and high-risk prediabetics. The threshold debate alone (12 ng/mL vs 20 ng/mL vs 30 ng/mL) shifts prevalence from 5% to 65%, which is less a measurement problem than a philosophical one about where “deficient” ends and “suboptimal” begins. What the data do support without much ambiguity: if you never supplement, rarely see direct sun, and live north of the 37th parallel, your serum 25(OH)D has almost certainly been below 20 ng/mL at some point. Whether that mattered is the question the field is still arguing about.
Fakta terkait
Sekitar 24% orang dewasa AS pada satu waktu memiliki vitamin D serum di bawah 20 ng/mL, dan orang dewasa yang tidak mengonsumsi suplemen punya peluang ~35% mengalami kekurangan di suatu titik dalam hidupnya. Kebanyakan menganggapnya masalah sempit bagi lansia yang terkurung di rumah.
Buku besar klaim
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1/4 sumber diverifikasi secara independen kata demi kata terhadap sumber terkutip
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[1] Frontiers in Nutrition (Liu et al.) — Prevalence, trend, and predictor analyses of vitamin D deficiency in the US population, 2001-2018 Terverifikasi
Prevalence, trend, and predictor analyses of vitamin D deficiency in the US population, 2001-2018- Statistik
Weighted prevalence of severe and moderate vitamin D deficiency: 2.6% and 22.0% respectively; insufficiency 40.9%- Kutipan
“"Among 71,685 eligible participants, the weighted prevalence of severe and moderate vitamin D deficiency was 2.6% and 22.0%, respectively, with vitamin D insufficiency at 40.9% and sufficiency at 34.5%." ”
- Data sumber dari
- 2022-10-07
- Diakses
- 2026-04-26 · salinan arsip
- Verifikasi
- Kutipan diambil ulang secara independen dan dikonfirmasi kata demi kata terhadap sumber terkutip selama audit pendasaran kami.
- Perhitungan
- NHANES 2001-2018 pooled analysis. Deficiency defined as serum 25(OH)D <12 ng/mL (severe) or 12-19 ng/mL (moderate), following the IOM cutoff of <20 ng/mL for combined deficiency. Total deficiency prevalence ~24.6%. Insufficiency (20-29 ng/mL) adds another 40.9%. Only 34.5% were classified as sufficient (≥30 ng/mL). The study found higher prevalence among non-Hispanic Black Americans, winter season, and ages 20-29 (paradoxically, due to lower supplement use and higher obesity in younger cohorts).
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[2] NIH Office of Dietary Supplements — Vitamin D - Health Professional Fact Sheet
Vitamin D - Health Professional Fact Sheet- Statistik
5% of US population at risk of deficiency (<30 nmol/L); 18.3% at risk of inadequacy (30-49 nmol/L) per 2011-2014 NHANES; 28% take vitamin D supplements- Kutipan
“"In 2011-2014, 5.0% of the population aged 1 year and older were at risk of vitamin D deficiency, and 18.3% were at risk of inadequacy. Approximately 28% of all individuals aged 2 years and older took a dietary supplement containing vitamin D." ”
- Data sumber dari
- 2024-08-15
- Diakses
- 2026-04-26 · salinan arsip
- Perhitungan
- The NIH ODS fact sheet reports NHANES 2011-2014 using the stricter IOM threshold (<30 nmol/L = <12 ng/mL) for "at risk of deficiency" and 30-49 nmol/L (12-19 ng/mL) for "at risk of inadequacy." Combined, 23.3% fall below 20 ng/mL by the broader clinical convention. Critically, 72% of US adults do NOT take vitamin D supplements, meaning the deficiency burden falls disproportionately on this majority. The 92% of men and 97%+ of women who get less than the EAR from food alone underscores how dependent adequate status is on either supplementation or sustained sun exposure.
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[3] Nutrition Research (Forrest & Stuhldreher) — Prevalence and correlates of vitamin D deficiency in US adults
Prevalence and correlates of vitamin D deficiency in US adults- Statistik
Overall vitamin D deficiency prevalence 41.6%; non-Hispanic blacks 82.1%, Hispanics 69.2%- Kutipan
“"The overall prevalence rate of vitamin D deficiency was 41.6%. The highest rate was seen in blacks (82.1%), followed by Hispanics (69.2%)." ”
- Data sumber dari
- 2011-01-01
- Diakses
- 2026-04-26 · salinan arsip
- Perhitungan
- Forrest & Stuhldreher analysis of NHANES 2005-2006 data (n = 4,495). Deficiency defined as serum 25(OH)D ≤20 ng/mL. The 41.6% figure is the most-cited prevalence estimate and is higher than the 2001-2018 pooled figure (24.6%) partly due to different assay methods and partly because the later pooled study used standardised calibration. The racial disparity (82.1% in Black Americans vs ~20% in non-Hispanic whites) is one of the largest in nutritional epidemiology, driven primarily by melanin-mediated reduction in cutaneous vitamin D3 synthesis.
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[4] Endocrine Society — Endocrine Society Guideline recommends healthy adults under the age of 75 take the recommended daily allowance of vitamin D
Endocrine Society Guideline recommends healthy adults under the age of 75 take the recommended daily allowance of vitamin D- Statistik
2024 Endocrine Society guideline recommends empiric (no pre-testing) vitamin D supplementation above the RDA for children/adolescents, adults 75+, pregnant people, and people with prediabetes; advises against routine testing and against high-dose supplementation for healthy adults under 75- Kutipan
“"We identified the following populations that may benefit from supplementation above the intakes recommended by the IOM because of the potential to reduce specific health risks: Children and adolescents 18 and younger -- potential to prevent nutritional rickets and to reduce the chance of respiratory infections. Individuals 75 and older -- potential to lower mortality risk. Pregnant people -- potential to reduce risk of pre-eclampsia, intra-uterine mortality, preterm birth, small-for-gestational age birth and neonatal mortality. People with prediabetes -- potential to reduce progression to diabetes."”
- Data sumber dari
- 2024-06-03
- Diakses
- 2026-07-03 · salinan arsip
- Perhitungan
- Grounds the body's and personal_factor_multipliers' references to the 2024 Endocrine Society guideline. The guideline is a supplementation recommendation, not a prevalence study, so it does not feed the native/normalized arithmetic; it supports only the caveats/multiplier discussion of who the guideline targets for empiric supplementation and its step-back from routine population screening.
- Independensi
- Professional-society clinical guideline, independent of the NHANES-based prevalence sources used for the headline numbers.