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Nutrition

Protein Tumbuhan Sing Saiki Cocog karo Susu kanggo Sintesis Otot

Dr. Gymbro · · 4 min read
#resistance training #older adults #leucine #corn protein #plant protein #muscle protein synthesis #milk protein

Protein Tumbuhan Sing Saiki Cocog karo Susu kanggo Sintesis Otot

Protein tanduran biyasa dianggep pilihan sing lemah kanggo mbangun otot. Uji acak anyar nuduhaké yèn protein jagung bisa dadi pengecualian. Ing wong tuwa, 20 g protein jagung nstimulasi sintesis protein otot (MPS) meh padha karo 20 g protein susu. Iki asil sing ditemokaké saka studi, lan apa sing durung bisa diceritakaké.

Studi: Protein Jagung vs. Susu

Tulisan iki, diterbitaké ing The Journal of Nutrition déning Lim lan kanca‑kanca (DOI: 10.1016/j.tjnut.2026.101895; PubMed 42933646), ngetes pitakonan sing durung tau dipelajari ing wong tuwa. Protein tanduran biasané nduwèni kandungan asam amino esensial sing luwih murah, utamané leusin, mula dianggep kurang anabolik tinimbang protein kéwan. Penulis nyorot yèn protein jagung unik amarga kandungan leusine sing relatif dhuwur. Wong tuwa uga nduwèni sensitivitas anabolik sing mudhun, dadi kelompok ujian sing tantangane luwih gedhé.

Para peneliti nindakake uji coba double‑blind, plasebo‑terkontrol, acak paralel karo 48 wong diwasa sehat (rata‑rata umur 68 ± 5 taun; 24 priya lan 24 wanita). Peserta nampa 20 g salah siji saka papat bahan iki:

  • CORN: isolat protein jagung
  • PEA + CORN: campuran protein kacang polong lan jagung
  • MILK: isolat protein susu
  • PLA: plasebo non‑protein, energi rendah

Kabeh peserta nindakaké latihan ekstensi lutut unilateral (3 set × 10 repetisi kanthi beban 75 % saka siji‑repetisi maksimum). MPS diukur nganggo infus kontinu L‑[ring‑13C6] fenilalanin, kanthi sampel darah lan otot dijupuk sacara periodik.

Angka Utama

Peningkatan MPS dibandhingaké karo nilai basal:

Grup Peningkatan MPS vs. basal
Protein jagung 216 ± 170 % (P < 0.001)
Campuran kacang + jagung 217 ± 167 % (P = 0.001)
Protein susu 138 ± 78 % (P = 0.033)
Plasebo 77 ± 46 %

Telung grup protein kabeh ngluwihi plasebo, lan penulis ora nemokaké bedane signifikan antarane grup protein. Rata‑rata protein jagung lan campuran luwih dhuwur tinimbang susu, nanging sebarané amba (delengen deviasi standar sing gedhé), mula kesimpulan sing adil yaiku “padha (comparable)”, ora “luwih apik”. Aja salah paham yèn jagung ngalahaké susu.

Olahraga Tetep Penting

Latihan resistensi nambah MPS luwih akeh tinimbang suplementasi waé ing saben grup (kabeh P < 0.001). Protein mbantu, nanging angkat beban nguataké respon, ora preduli saka sumber protein. Kanggo wong tuwa sing ngangkat beban, tulisan iki ndhukung kombinasi protein karo latihan tinimbang ngandelake salah siji wae.

Napa Leusin Dadi Sorotan

Leusin iku asam amino sing paling kuat ngaktifaké respons pembangunan otot. Protein tanduran asring kurang leusin, mula biasané dianggep kurang efektif saben gram. Penulis nyebut yèn kadar leusin sing relatif dhuwur ing protein jagung bisa dadi sebab kenapa perilakune béda. Ringkesané ora nyedhiyakake angka leusin lan ora nguji leusin minangka penyebab, mula anggep penjelasan iki minangka hipotesa penulis, dudu mekanisme sing wis kabukten.

Kasil Praktis

Dosis: Studi iki nggunakake 20 g protein saben sajian. Iki siji‑sijine dosis sing diuji, dadi angka bukti sing bisa dipasangake. Uji coba ora mbandhingaké dosis liya.

Wektu: Abstrak nyritakaké peserta ngonsumsi protein sakwaktu latihan sikil tunggal. Ora diuji jendela wektu liya, mula ora bisa dipastikan apa luwih becik sadurunge, nalika, utawa sawisé latihan.

Sapa sing cocok:

  • Pengangkat umur: Iki populasi sing dipelajari (dewasa sehat umur ±68 taun), lan respons tetep apik sanajan sensitivitas anabolik mudhun amarga umur.
  • Wong sing mbatesi susu utawa produk kéwan: Protein jagung lan campuran kacang‑polong + jagung ngasilaké respons MPS sing padha karo protein susu. Peserta ora dipilih minangka vegan, mula iki inferensi saka sumber protein, dudu asil ing pemakan vegan.
  • Sapa wae sing nyiapaké campuran protein nabati: Campuran kacang‑polong + jagung kinerjaé padha karo jagung dhéwé, nuduhaké yèn pencampuran iku pilihan sing layak.

Sapa sing kudu ati‑ati utawa ora nganggo:

  • Wong sing alergi utawa sensitif marang jagung: Studi ora nyebutaké iki, nanging jelas dadi pengecualian praktis.
  • Sapa wae sing ngarep‑arep bukti peningkatan otot jangka panjang: Uji iki mung ngukur MPS, penanda mekanistik jangka pendek, ora pangowahan ukuran otot utawa kekuatan sajrone minggu utawa sasi.
  • Wong kanthi kondisi medis: Peserta yaiku wong dewasa sehat. Temuan mbok menawa ora bisa ditrapaké kanggo wong sing ngidap penyakit ginjal, frailty, utawa lara liya, mula konsultasi dhokter luwih dhisik.

Detil Penting

Telung cathetan penting:

  1. Sampel cilik – 48 peserta sing dipérang dadi papat grup iku sampel cilik, lan variabilitas gedhé ing grup jagung nuduhaké yèn respon individu béda‑béda.
  2. MPS jangka cekak – MPS ing jendela wektu sing cekak ora padha karo pertumbuhan otot suwe.
  3. Plasebo uga nambah – Grup plasebo nuduhaké kenaikan MPS 77 % saka baseline, kang ngélingaké yèn latihan lan konteks pangukuran mengaruhi angka‑angka iki. Dadi persentase kudu dipahami ing konteks desain studi.

Ringkesan

Kesimpulan tulisan iki prasaja: 20 g protein jagung, campuran kacang‑polong + jagung, utawa protein susu nambah MPS ing wong tuwa sehat, lan latihan resistensi nambah respons luwih lanjut. Kanggo sapa wae sing kepéngin opsi nabati tanpa nganggep kompromi ing respons anabolik, protein jagung saiki dadi calon sing kredibel. Uji latihan jangka panjang bakal mbuktekaké apa kauntungan jangka cekak iki owah dadi pertumbuhan otot lan kekuatan nyata.

Source: Lim et al., The Journal of Nutrition. Trial registration NCT05917223. PubMed: https://pubmed.ncbi.nlm.nih.gov/42933646

Original study

Read the original research on pubmed.ncbi.nlm.nih.gov →

This article summarizes published research for general information. It is not medical advice.

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Dr. Gymbro

Dr. Gymbro writes for Dr. Gymbro: science-backed fitness, nutrition & performance.

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