Fireblood Blog — Supplement Science & Ingredient Guides

Potassium supplement best form: 5 forms compared
Potassium supplement best form: 5 forms compared
Potassium chloride, citrate, gluconate, bicarbonate. Five common forms compared on absorption, dose, and what they actually do. Read more...
L-5-MTHF vs L-methylfolate: why the real fight is folic acid
L-5-MTHF vs L-methylfolate: why the real fight is folic acid
L-5-MTHF and L-methylfolate are the same molecule. The fight that actually matters is methylfolate vs folic acid, and your MTHFR gene decides who wins. Read more...
Best potassium supplement for leg cramps: what’s actually going on in your calf
Best potassium supplement for leg cramps: what’s actually going on in your calf
Leg cramps aren’t just a potassium problem. Here’s what’s actually happening in the pump, and the four minerals that run it. Read more...
Protein, creatine, omega 3: long-term performance verdict
Protein, creatine, omega 3: long-term performance verdict
Protein, creatine, omega 3 have the strongest evidence base in sports supplementation. Also the smallest part of long-term performance. Here’s the rest. Read more...
Vitamin D Deficiency in Men: Symptoms, Causes, and What to Do About It
Vitamin D Deficiency in Men: Symptoms, Causes, and What to Do About It
Vitamin D is unusual. It behaves more like a hormone than a vitamin. Receptors for it exist in almost every tissue in your body, including the brain, muscles, immune cells,... Read more...
The nutrient deficiency map: what men are missing
The nutrient deficiency map: what men are missing
94.3% of Americans don’t meet the EAR for vitamin D from food alone. 97% don’t hit the potassium AI. Roughly 48% fall short on magnesium. Vitamin E sits near 90%... Read more...
Fireblood vs Ritual: 39 ingredients vs 10
Fireblood vs Ritual: 39 ingredients vs 10
Ritual has 10 nutrients with named suppliers. Fireblood has 39 at clinical doses. Here is what the labels show, side by side. Read more...
One scoop replaces 8 bottles
One scoop replaces 8 bottles
Most men spend $120+/month on separate bottles with cheap forms. One scoop covers 39 ingredients for $2/day. Here’s the breakdown. Read more...
Your B12 supplement contains a cyanide molecule
Your B12 supplement contains a cyanide molecule
Cyanocobalamin is a synthetic B12 stabilised with a cyanide molecule your body must remove before use. Here’s why the form of B12 in your supplement matters more than the dose.... Read more...
Taking vitamin D without K2 calcifies your arteries
Taking vitamin D without K2 calcifies your arteries
You probably already know vitamin D is important. Your doctor may have told you to supplement it. The NHS recommends it every autumn and winter. So you bought a bottle,... Read more...
Brain fog: causes and the nutrients that clear it
Brain fog: causes and the nutrients that clear it
Brain fog isn’t laziness or a personality flaw. It’s your brain running on depleted inputs. Here are the real causes and the specific nutrients that clear it. Read more...
How to read a supplement label in 2 minutes
How to read a supplement label in 2 minutes
5 things to check on any supplement label before you buy. Takes 2 minutes. Saves you from underdosed, overpriced formulas. Read more...