{"title":"Brain Fog","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eDifficulty concentrating, forgetfulness, or a persistent mental fog can be linked to underlying nutrient and hormone levels. Thyroid function, vitamin B12, and ferritin all play a role in cognitive function, and are simple to check with finger-prick blood tests.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eOrder your tests online, take a small sample at home, and post it to our UK lab using the prepaid envelope provided. Results are typically ready within days, with clear reference ranges to discuss with your GP.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eBrain fog has many possible causes, including sleep, stress, and other health conditions. These tests are designed to help identify physical contributors alongside your symptoms, not to diagnose the underlying cause on their own.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBrowse our brain fog blood tests below\u003c\/strong\u003e, or explore individual tests for Thyroid Function, Vitamin B12, and Ferritin.\u003c\/p\u003e","products":[{"product_id":"ferritin-blood-test-kit","title":"Ferritin Blood Test Kit. Home Kit with Laboratory Results","description":"\u003cp\u003eAre you experiencing persistent fatigue, low energy, shortness of breath, or noticeable \u003ca href=\"https:\/\/londonhealthcompany.co.uk\/blogs\/health-medical-information\/iron-deficiency-and-hair-loss-in-women-what-does-the-research-say\"\u003ehair loss\u003c\/a\u003e? Low ferritin, the protein that stores iron in your body, is one of the most common and overlooked causes. This simple home blood test measures your exact iron storage levels, helping you identify iron deficiency before it progresses to anaemia.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/londonhealthcompany.co.uk\/blogs\/health-medical-information\/ferritin-and-iron-why-low-levels-may-be-behind-fatigue-and-hair-loss\"\u003eFerritin deficiency\u003c\/a\u003e is commonly linked to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChronic fatigue or low energy\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/londonhealthcompany.co.uk\/blogs\/health-medical-information\/iron-deficiency-and-hair-loss-in-women-what-does-the-research-say\"\u003eHair thinning or hair loss\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eBrittle nails or pale skin\u003c\/li\u003e\n\u003cli\u003eWeakness or difficulty concentrating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEarly detection allows for targeted action, whether that's dietary changes, iron supplementation, or further medical evaluation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is tested:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/londonhealthcompany.co.uk\/pages\/ferritin\"\u003eSerum Ferritin\u003c\/a\u003e — a sensitive marker of your body's available iron stores and the most reliable indicator of iron-deficiency anaemia.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso worth considering:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile ferritin checks your iron storage, unexplained fatigue is also frequently caused by thyroid imbalances. If you want a complete picture in one sample, consider adding our \u003ca href=\"https:\/\/londonhealthcompany.co.uk\/products\/thyroid-panel-blood-test-tsh-ft3-ft4\"\u003eThyroid Profile\u003c\/a\u003e (TSH, Free T3 and Free T4) to your order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYour results:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDelivered as a secure PDF report to your email within 3 working days of your sample arriving at our laboratory. Results are quantitative, showing your exact ferritin level alongside reference ranges and notes for any values outside the normal range. All samples are processed in a CQC-regulated UK laboratory.\u003c\/p\u003e","brand":"London Health Company","offers":[{"title":"Default Title","offer_id":44873832431916,"sku":"Ferritin","price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/2017\/5660\/files\/Ferritin-Blood-Test-Kit-Home-Kit-with-Laboratory-Results.png?v=1782404833"},{"product_id":"thyroid-profile-blood-test","title":"Thyroid Function Blood Test (TSH, Free T3, Free T4)","description":"\u003cp data-path-to-node=\"18\"\u003eYour thyroid is a small, butterfly-shaped gland that acts as the master control center for your entire metabolism. It produces vital hormones that dictate exactly how your body uses energy, regulates temperature, manages weight, and maintains your mood. When your thyroid is sluggish (hypothyroidism) or overactive (hyperthyroidism), it can manifest as unexplained weight gain or loss, persistent exhaustion, constant feeling of cold or heat, thinning hair, and brain fog.\u003c\/p\u003e\n\u003cp data-path-to-node=\"19\"\u003eStandard medical checks often only screen for \u003cb data-path-to-node=\"19\" data-index-in-node=\"46\"\u003eTSH (Thyroid Stimulating Hormone)\u003c\/b\u003e, which frequently misses the full clinical picture. Our \u003cb data-path-to-node=\"19\" data-index-in-node=\"136\"\u003eAt-Home Thyroid Function Blood Test Kit\u003c\/b\u003e delivers a comprehensive overview of your hormonal health by measuring the three most critical thyroid markers simultaneously: \u003cb data-path-to-node=\"19\" data-index-in-node=\"303\"\u003eTSH, Free T3 (FT3), and Free T4 (FT4)\u003c\/b\u003e. By looking at both the stimulating hormone and the active thyroid hormones circulating in your blood, this profile lets you see exactly how well your thyroid gland is performing.\u003c\/p\u003e\n\u003cp data-path-to-node=\"20\"\u003e\u003cb data-path-to-node=\"20\" data-index-in-node=\"0\"\u003eHow to complete your thyroid test from home:\u003c\/b\u003e Monitoring your metabolic health is completely private and straightforward. There is no need to queue at a clinical center or wait weeks for an appointment slot.\u003c\/p\u003e\n\u003cp data-path-to-node=\"21\"\u003eYour discreetly packaged testing kit includes everything you need: sterile finger-prick lancets, sample collection tubes, simple step-by-step instructions, and a prepaid UN3373 priority envelope. Simply collect a few drops of blood first thing in the morning and post it directly back to us using any standard mailbox.\u003c\/p\u003e\n\u003cp data-path-to-node=\"22\"\u003eEvery sample is handled and processed inside our in-house, \u003cb data-path-to-node=\"22\" data-index-in-node=\"59\"\u003eCQC-regulated UK laboratory\u003c\/b\u003e to ensure absolute hospital-grade accuracy. Within 1 to 3 working days of your sample reaching our facility, your final quantitative results will be securely uploaded to your private digital dashboard, featuring clear visual ranges and commentary.\u003c\/p\u003e","brand":"London Health Company","offers":[{"title":"Default Title","offer_id":47784059994412,"sku":"RP4","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/2017\/5660\/files\/thyroid-function-blood-test-tsh-free-t3-free-t4_jpg.png?v=1781036056"},{"product_id":"vitamin-b12-blood-test","title":"At-Home Vitamin B12 Blood Test Kit (UK) | Energy \u0026 Vitality Check","description":"\u003cp data-path-to-node=\"17\"\u003eVitamin B12 is an essential nutrient that your body relies on to function properly, yet it cannot produce it on its own. It plays an indispensable role in red blood cell formation, neurological function, DNA synthesis, and cellular energy production. When your B12 levels run low, it can show up in your day-to-day life as unrelenting fatigue, constant muscle weakness, annoying pins and needles, mood swings, and frustrating brain fog.\u003c\/p\u003e\n\u003cp data-path-to-node=\"18\"\u003eOur \u003cb data-path-to-node=\"18\" data-index-in-node=\"4\"\u003eAt-Home Vitamin B12 Blood Test Kit\u003c\/b\u003e is a clinical-grade check designed to measure your exact levels of active B12 circulating in your blood. Unlike generic diet diaries or symptom tracking, this simple blood test gives you an undeniable biological snapshot of your internal health. It is an absolutely vital check for vegans, vegetarians, and plant-based eaters, as Vitamin B12 is almost exclusively found in animal-derived foods. It is also highly recommended for older adults or anyone taking long-term acid reflux medications, which can drastically inhibit dietary B12 absorption.\u003c\/p\u003e\n\u003cp data-path-to-node=\"19\"\u003e\u003cb data-path-to-node=\"19\" data-index-in-node=\"0\"\u003eHow to test your B12 levels from home:\u003c\/b\u003e There is no need to book a clinic slot or wait for a standard doctor's appointment. Our kit includes everything required to complete the test completely from the comfort of your living room.\u003c\/p\u003e\n\u003cp data-path-to-node=\"20\"\u003eSimply perform a quick, minimally invasive finger-prick using the provided sterile lancet to collect a small blood sample into the collection tube. Once done, place your sample into the prepaid return envelope and drop it into any priority postbox.\u003c\/p\u003e\n\u003cp data-path-to-node=\"21\"\u003eYour sample is routed directly to our \u003cb data-path-to-node=\"21\" data-index-in-node=\"38\"\u003eCQC-regulated UK laboratory\u003c\/b\u003e for expert analysis, guaranteeing hospital-grade accuracy and strict data privacy. Within 1 to 3 working days of laboratory receipt, your final quantitative results will be securely delivered to your private digital dashboard, complete with clear visual reference ranges and professional doctor-reviewed commentary.\u003c\/p\u003e","brand":"London Health Company","offers":[{"title":"Default Title","offer_id":47784068284716,"sku":"Vit B12","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/2017\/5660\/files\/Vitamin-B12-Deficiency-Blood-Test.png?v=1782486956"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/2017\/5660\/collections\/Brain-fog-blood-tests.png?v=1784549142","url":"https:\/\/londonhealthcompany.co.uk\/collections\/brain-fog.oembed","provider":"London Health Company","version":"1.0","type":"link"}