generate short, concise and compelling ad headline templates, as {headline, keyword}, within 5 words for our Google Ads campaign targeting the keyword vitamin b complex, emphasizing the purchase from Lazada is fast, safe, convenient, lowest price guaranteed, authentic,  large variety of brands and shops to choose from,  and many other benefits customers can get from our websites. for example, "Shop with Lazada-{keyword}", "Discover the Benefits of {keyword} from Lazada"