The latest skincare trend taking over TikTok is a blood test. Some influencers say raising their ferritin levels transformed their complexion in ways no product could. But before booking a blood test or buying iron supplements in your quest for better skin, let’s look at the science.
Ferritin is a protein that stores iron in the body, so a ferritin blood test is really a way of checking how much iron you have in reserve. Unlike iron itself, which can fluctuate throughout the day, ferritin is a better indicator of the body’s iron stores. Iron is an important nutrient.
It supports growth, immune function and energy production and is essential for haemoglobin, the protein that carries oxygen around the body. Because it’s so important, the body tightly regulates how much it holds on to. Run too low, and you risk anaemia—a condition where the blood can’t carry enough oxygen, which can become dangerous if left unchecked.
Some people are more likely to run low on iron than others, including pregnant women, anyone with heavy periods, people with inflammatory bowel diseases, vegetarians and vegans. The symptoms can show up in plenty of places besides your bloodwork: fatigue, weaker immunity, mouth sores, brittle nails, hair loss, and yes, paler skin. So there is a kernel of truth in “ferritin face”—severe iron deficiency, particularly when it causes anaemia, can make someone look pale.
But that doesn’t mean low ferritin produces a distinctive facial appearance. Hormones, bad sleep, stress, dehydration or not eating enough key nutrients can all leave you looking pale and tired. A mirror can’t tell you whether your ferritin is low—only a blood test can do that.
If a test does show low ferritin, a doctor might suggest iron supplements. But on social media, that message tends to get translated into “buy this supplement”, and the line between medical advice and marketing gets blurry fast. Some brands suggest that any skin complaint can be fixed with the right pill or powder, linking their products to beauty, femininity and body image to make the sale.
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