Fireblood Blog — Supplement Science & Ingredient Guides
Folate deficiency symptoms: what shows up first
Folate deficiency causes fatigue, a sore red tongue and mouth ulcers. UK folate levels have fallen since 2008. What to check and what to do.
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What food is highest in vitamin K? K1 and K2 ranked
Natto tops vitamin K2. Collard greens and spinach top K1. The ranked list with USDA numbers, plus how much vitamin K you actually need.
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Best time to take vitamin B12 (and what matters more)
Morning with breakfast is the practical answer. But dose size and the gap between doses change your B12 levels far more than the clock.
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What is vitamin B6 good for? The honest answer
Vitamin B6 builds haemoglobin and processes protein. It also damages nerves above a certain dose. What it does, how much you need, where the cap sits.
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Best time to take magnesium glycinate (and why dose matters more)
Take magnesium glycinate in the evening with food. Here is what the absorption and sleep trials actually show, and why dose size beats clock time.
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Can a multivitamin fit in just one capsule?
A one-a-day capsule holds under a gram of powder. A day's potassium alone weighs nine grams. The arithmetic behind the one capsule multivitamin.
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What is metabolism? What actually sets your burn rate
Metabolism is every reaction that turns food into energy. What sets your rate, why age matters less than you think, and the nutrients it runs on.
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What food is highest in selenium? Brazil nuts, by a mile
Brazil nuts top the list at 1,920mcg per 100g, but their selenium varies wildly by region. The full ranked list, and why soil changes the numbers.
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Best vitamin D supplement: what the label has to show
The best vitamin D supplement is D3 at 400 to 4,000 IU, taken with fat. Six label checks that separate a working bottle from a decoration.
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How to take calcium supplements for best absorption
Split the dose under 500mg, take carbonate with food, and keep it away from your zinc. What the calcium absorption research actually shows.
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Best multivitamin gummies for men: what the format can carry
Gummies beat tablets on vitamin D absorption but cannot carry a full mineral profile. What to check on a gummy label, and when to use another format.
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Best form of zinc: 5 forms ranked by absorption data
Zinc bisglycinate absorbs best at daily doses. Citrate and gluconate tie. Oxide lags. What each absorption trial actually measured.
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