Shadowing Practice: Does Aloe Really Treat a Sunburn? - Learn English Speaking with Video
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It’s advice as old as time: if you get a sunburn, start lathering on the Aloe Vera.
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And when we say ‘old as time’, we mean it.
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Humans have been using aloe vera medicinally for thousands of years.
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But does the slimy gel actually have skin-healing properties?
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Well, the research is surprisingly scarce, but it seems like it may help boost your skin’s natural healing process.
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Sunburns themselves really aren’t all that different than burns from a campfire, a curling iron, or stepping on a George Foreman grill.
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So studies looking at burn healing tend to lump them together.
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And there is some evidence that applying the mucus innards from Aloe plants helps you heal faster after a burn.
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A review from 2007 in the journal Burns found that in 127 burn victims, those who used aloe healed almost 9 days faster on average than those in control groups.
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But what aloe actually does is a little less clear.
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In general, there are three main concerns when treating burns: reducing pain, actually healing the wound, and preventing infection.
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Aloe’s antibacterial and antifungal activities are well documented, so it might simply help because it keeps pesky microbes at bay.
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But ask just about anyone who slathers on the aloe after a sunburn, and they’ll swear it’s an analgesic, meaning that it reduces pain.
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And that might be because it reduces inflammation—your body’s immune response that makes things like sunburns all red and painful.
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For example, an experiment in 1993 was able to isolate an enzyme in aloe that breaks down bradykinin, an inflammatory substance linked with pain.
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But there’s not all that much clinical research on aloe pain-killing effects, so the jury is still out on whether they’re real, or it’s just acting as a placebo.
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There’s a bit more evidence that it boosts skin healing.
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Studies in rats have shown that aloe extract helps new skin cells move into burned areas, so they can rebuild the damaged tissue.
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And the gooey gel in aloe vera contains a large amount of glucomannan, a fiber comprised mostly of the sugar mannose, which stimulates the production of fibroblastic growth factor.
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It helps stimulate the formation of collagen and new blood vessels, which speed up how quickly the skin heals.
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That said, human studies to date are kind of flimsy.
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A 2012 Cochrane review noted that the few trials that have been conducted aren’t high quality—they’re all small, and their results are potentially biased by things the patients or caregivers knowing aloe was being used.
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So, it might work, or it might just be that people think it’ll work.
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And when it comes to your over the counter sunburn gel, it might not even be the aloe itself.
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Researchers have found that it can speed up that absorption of vitamins and drugs through the skin.
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So if your aloe gel also has things like Vitamin E, or some other anti-inflammatory drug, that substance gets into your skin faster.
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But whether aloe works or not, I think we can all agree it’s just better to avoid needing it.
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So if you’re going to spend some time in the sun this summer, maybe take steps to avoid overexposure instead of relying on aloe to soothe your beet-red skin afterwards.
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Thanks to Joelle and Brianna Beecher for asking, and to all our patrons who voted for this question in our poll.
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If you want to ask us questions like this and help decide which of them we answer, or just get a bunch of awesome rewards you can’t get anywhere else, you can head on over to Patreon.com/SciShow.
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Vocabulario y notas de pronunciación para esta lección
Este vídeo tiene 30 frases y 604 palabras para practicar shadowing. La parte hablada dura 3:21. El hablante habla rápido, unas 181 palabras por minuto, así que espera sonidos enlazados y reducidos. Solo el 77 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente.
Vocabulario clave de este vídeo
15 palabras del vídeo que vale la pena aprender, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| heal verbo | /ˈhiːl/ | curar, sanar |
| boost verbo | /buːst/ | aupar, upar |
| substance sustantivo | /ˈsʌbstəns/ | sustancia, substancia |
| inflammatory adjetivo | /ɪnˈflæmət(ə)ɹi/ | inflamatorio |
| stimulate verbo | /ˈstɪm.jəˌleɪt/ | estimular |
| afterwards adverbio | /ˈæf.tɚ.wɚdz/ | después, consecuentemente |
| potentially adverbio | /pəˈtɛnʃ(ə)li/ | potencialmente, presuntamente |
| experiment sustantivo | /ɪkˈspɛɹ.ə.mənt/ | experimento |
| poll sustantivo | /poʊl/ | encuesta, sondeo |
| infection sustantivo | /ɪnˈfɛkʃən/ | infección, infición |
| reward sustantivo | /ɹɪˈwɔɹd/ | recompensa |
| painful adjetivo | /ˈpeɪn.fl̩/ | doloroso |
| tissue sustantivo | /ˈtɪʃ.(j)u/ | tejido |
| rely verbo | /ɹɪˈlaɪ/ | atenerse, fiarse |
| vessel sustantivo | /ˈvɛsəl/ | embarcación, barco |
Phrasal verbs que vas a escuchar
| Palabra | Pronunciación | Significado |
|---|---|---|
| speed up verbo | /spiːdˈʌp/ | acelerar, apurarse |
| break down verbo | descomponerse, averiarse |
Pronunciación a tener en cuenta
El hablante usa 8 contracciones y formas reducidas, como aren't, they're, can't. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “th”: lather /ˈlæð.ɚ/, slather /ˈslæðə(ɹ)/, soothe /suːð/
- Los sonidos de “sh” y “zh”: potentially /pəˈtɛnʃ(ə)li/, infection /ɪnˈfɛkʃən/, tissue /ˈtɪʃ.(j)u/, inflammation /ɪnfləˈmeɪ̯ʃən/, absorption /æbˈsɔɹp.ʃn̩/
- Palabras largas — cuida el acento: inflammatory /ɪnˈflæmət(ə)ɹi/, potentially /pəˈtɛnʃ(ə)li/, experiment /ɪkˈspɛɹ.ə.mənt/, surprisingly /səˈpɹaɪzɪŋli/, inflammation /ɪnfləˈmeɪ̯ʃən/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como heal, boost, substance.
Gramática en este vídeo
Las estructuras que más usa el hablante, con las palabras exactas del vídeo:
| Estructura | En el vídeo |
|---|---|
| Present perfect have/has + participio pasado — una acción pasada que sigue importando ahora | have shown · have been conducted · have found |
| Oraciones de relativo who / which + oración — información extra sobre una persona o cosa | those who used · anyone who slathers |
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.