NOT STACKED AS IS
Acute immunity · Cold symptom support
Both BOOST formulas carry another 15 mg of zinc and another 25 µg of vitamin D3. Next to this one your zinc reaches 25 mg, which is the EFSA upper limit itself: the engine flags reaching it, not only passing it, and at 25 mg it also asks for 1 mg of copper alongside the zinc or blocks the combination. The sums do not stop there. Either BOOST takes your vitamin C to 1,200 mg a day, above the 1,000 mg we allow when an ingredient sits in two active formulas. Both add elderberry, a second major immune stimulant, and our rule is one at a time. And with Acute immunity your echinacea would reach 3,000 mg a day, against the 1,200 mg a day we allow summed. None of these stacks is served as it stands.
ABOVE OUR OWN CEILING
Autoimmune thyroid
That formula carries 200 µg of selenium. With the 55 µg here you would be at 255 µg, the EFSA upper limit, and above the 200 µg a day we set as our own ceiling for selenium across formulas. It is also written for an autoimmune condition, one of the profiles this formula is never assigned to.
TALK TO A DOCTOR FIRST
Not for everyone
Not for you if you have an autoimmune condition (including lupus, rheumatoid arthritis, multiple sclerosis, scleroderma, inflammatory bowel disease, vitiligo or active psoriasis), liver disease, an organ transplant, advanced HIV, active tuberculosis, leukaemia or lymphoma; if you are immunosuppressed or take immunosuppressants; if you take vitamin K antagonist anticoagulants such as warfarin or acenocoumarol; if you are allergic to the daisy family (Asteraceae); if you have had selenium toxicity, have high blood selenium or a known hypersensitivity to selenium; if you have Menkes disease; if you are pregnant or breastfeeding; or for children under 12. Talk to a doctor first if you are under 18; take other anticoagulants such as apixaban or dabigatran, or antiplatelets; take digoxin, thiazide diuretics, anticonvulsants, statins, systemic corticosteroids such as prednisone, orlistat, quinolone or tetracycline antibiotics, penicillamine, bisphosphonates, deferoxamine, aluminium-containing antacids, levothyroxine or antithyroid medicines, ciclosporin or other medicines broken down by the liver, azole antifungals, antiretrovirals, long-term medicines that strain the liver such as paracetamol or isoniazid, or any cancer treatment; have kidney disease or calcium kidney stones, high blood calcium, sarcoidosis or primary hyperparathyroidism, haemochromatosis, thalassaemia or other iron overload, G6PD deficiency, or type 2 diabetes with high selenium levels; have lost your sense of smell or use intranasal zinc products; or already take zinc, selenium or vitamin D from other supplements. Stop and ask if you notice yellowing skin or eyes, unusual tiredness, abdominal pain or dark urine. If you do take any of them, the zinc here needs at least 2 hours' separation from penicillamine, from tetracyclines and from bisphosphonates, and 2 hours before or 4 to 6 hours after a quinolone; the selenium needs at least 4 hours from levothyroxine. The EMA limits echinacea to 10 days in a row, and never more than 8 weeks in total. The vitamin D3 is not vegan. The app asks before it ever assigns this one.
