Tea may not bring dramatic results all the time but they are well tolerated and produce far fewer side effects that regular acne medications. This means a single cup of tea provides 8 percent to 18 percent of the recommended intake of iron per day for an adult. Nettle tea being rich as it is in Vitamin K can affect the blood’s ability to clot. Nettle leaf can be use externally as an ointment and also consumed as nettle tea. Nettle Tea & Its Health Benefits Nettle tea is made from the roots or leaves of the stinging nettle plant and is perhaps best known for its anti-inflammatory properties. This is one of the most frequently asked questions of beginning tea lovers. Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat..