We don’t always have the answers, but we have some people on speed dial who do — which is why we present to you our series FYI where we have experts explain if lip balm is actually bad , how often you should wash your hair and more. When it comes to beauty trends, it’s not an exaggeration to say that a ton of them are born on TikTok. Some examples: Using coconut oil on wrinkles , beef tallow as moisturizer and onion shampoo for hair growth . And while some trends are kooky and better left on