Does a cotton versus silk pillowcase really make a difference for wrinkles?
Based on the available study, nothing can be said about this. The source contains no information about pillowcases or wrinkles, so no conclusion can be drawn from it.
The available source contains no data whatsoever on pillowcases, cotton, silk or wrinkle formation. The provided study concerns heat transfer at a very small scale and body temperature regulation, and is therefore entirely unsuitable for answering this question.
Based on what is presented here, it cannot be said whether or not the material of your pillowcase has any effect on wrinkles. Quite simply, no source has been provided to support that.
To answer this question fairly, research would be needed that directly compares skin friction, sleeping position and differences in material. That is entirely absent here.
Does taking collagen supplements actually work against wrinkles?
Taking hydrolysed collagen reduces wrinkles and improves hydration and elasticity, although the effects are modest and no established dose exists. Most studies used 2.5 to 10 grams per day for 8 to 16 weeks; marketing promises of spectacular skin rejuvenation are exaggerated.
Does microneedling work for wrinkles and scars?
Microneedling demonstrably works for wrinkles and acne scars, with radiofrequency microneedling being the variant with the strongest evidence base. Combining it with PRP can enhance results, but make sure you are well informed about side effects and choose an experienced practitioner.
Does retinol help against wrinkles?
Retinol demonstrably works against wrinkles and improves skin texture, although tretinoin is more potent for those who can or wish to obtain a prescription; people who experience irritation may consider bakuchiol as an equivalent alternative based on one small study.
Do making lots of facial expressions cause more wrinkles?
Repeated facial expressions probably contribute to wrinkle formation, but sunlight is the best-documented factor. Sun protection is therefore the most concrete step you can take.
Does drinking lots of water really help against dry skin and wrinkles?
Drinking extra water probably helps a little with dry skin, especially if you were chronically under-hydrated, but its effect on wrinkles has not yet been proven. Make sure you drink enough, but do not expect a dramatic result for your skin.
What is the best-proven remedy for wrinkles: retinol or vitamin C?
Tretinoin (prescription vitamin A) has the best-proven evidence base against sun-related wrinkles; vitamin C has preliminary positive indications but has been studied far less. If you have sensitive skin or do not have a prescription, over-the-counter retinol is a reasonable alternative.