The iVitaLab Blog

Evidence-based supplement guides. No hype, no paid placements — just what the science actually says.

Longevity

Best Vitamins for Longevity 2026: The Core Stack

The six supplements with the strongest evidence for living longer — from D3+K2 to NAD+ and Urolithin A.

10 min read · April 2026
Vitamins

D3 + K2: Why You Always Need Both Together

The calcium paradox explained — and why taking D3 alone for years may be increasing your cardiovascular risk.

7 min read · April 2026
Sleep & Recovery

Magnesium for Sleep: Citrate vs Glycinate vs Oxide

Not all magnesium is equal. Here's which form works for sleep — and which one to skip entirely.

6 min read · April 2026
Longevity

Resveratrol and Feeling Younger: What the Science (and Sinclair) Actually Say

A Harvard professor has taken 1 gram of this daily for years. Here's the mechanism — and what high-dose resveratrol actually does to how you feel.

9 min read · April 2026
Longevity

NMN vs NR: Which NAD+ Precursor Is Actually Worth It?

Honest comparison of the two main NAD+ supplements, with absorption data, cost analysis, and why TMG is non-negotiable.

8 min read · April 2026
Blood Sugar

Berberine vs Metformin: The Natural Blood Sugar Alternative

A 2008 RCT put berberine head-to-head with metformin. The results were closer than most people realize.

8 min read · April 2026
Heart Health

CoQ10 vs Ubiquinol: Which Form Actually Gets Absorbed?

The form of CoQ10 you take determines how much actually reaches your mitochondria. Most people over 40 are using the wrong one.

7 min read · April 2026
Heart Health

Best Supplements for Heart Health 2026

Three supplements with real cardiovascular clinical data: CoQ10, nattokinase, and omega-3 cod liver oil.

9 min read · April 2026
Omega-3

Omega-3 vs Cod Liver Oil: What's the Real Difference?

Same EPA and DHA, very different nutritional profiles. Plus: why rancid fish oil is worse than none at all.

7 min read · April 2026
Longevity

How to Build a Longevity Supplement Stack from Scratch

A tiered approach starting where the evidence is strongest, with real monthly costs at each level.

9 min read · April 2026
Longevity

Quercetin: The Senolytic Supplement That Helps Clear Aging Cells

Zombie cells drive chronic inflammation. Quercetin has human clinical data for clearing them through pulse dosing.

8 min read · April 2026
Heart Health

Nattokinase for Blood Pressure and Cardiovascular Health

An enzyme from fermented soybeans with measurable blood pressure reduction and fibrinolytic activity in clinical trials.

7 min read · April 2026
Men's Health

Best Supplements for Men Over 40

CoQ10, NAD+, D3+K2, and zinc picolinate targeted at the specific metabolic and hormonal changes after 40.

9 min read · April 2026
Women's Health

Best Supplements for Women Over 40

D3+K2, magnesium, NAD+, and liposomal glutathione for the specific challenges of women in midlife.

9 min read · April 2026
Gut Health

Akkermansia: The Gut Bacteria at the Frontier of Longevity Research

Centenarians consistently have more of it. A Nature Medicine trial confirmed its metabolic benefits. Here's what to know.

8 min read · April 2026
Detox

NAC: The Underrated Detox Supplement Most People Have Never Heard Of

Used in hospital ERs for liver protection, NAC is also a powerful glutathione precursor for daily antioxidant support.

8 min read · April 2026
Antioxidants

Liposomal Glutathione vs Regular: Which Actually Gets Absorbed?

Standard oral glutathione is mostly destroyed by digestion. Liposomal delivery changes the bioavailability equation significantly.

7 min read · April 2026
Longevity

Spermidine: The Longevity Molecule Found in Everyday Foods

This polyamine triggers autophagy. A PRISM trial found cognitive improvements in older adults. Here's the honest assessment.

7 min read · April 2026
Minerals

Boron: The Forgotten Mineral for Testosterone and Bone Density

At $12.95 per month, boron increases free testosterone by reducing SHBG and improves vitamin D activation efficiency.

7 min read · April 2026
Anti-Aging

L-Carnosine: The Anti-Aging Supplement Athletes and Longevity Researchers Both Use

Anti-glycation, muscle pH buffering, and neuroprotection. Especially valuable for vegans who miss dietary carnosine.

7 min read · April 2026
Longevity

Pterostilbene vs Resveratrol: Why the Lesser-Known One Might Be Better

Resveratrol has the celebrity endorsements. Pterostilbene has 80% bioavailability and a longer half-life. Here's the honest comparison.

8 min read · April 2026
Brain Health

Ginkgo Biloba for Memory: Does It Actually Work in 2026?

The most researched herbal nootropic has a nuanced evidence base. Here's who benefits and who won't feel much.

7 min read · April 2026
Vitamins

Tocotrienols: The Vitamin E Form Your Body Actually Prefers

Most vitamin E supplements use only tocopherols. The tocotrienol family has stronger evidence for cardiovascular and brain protection.

7 min read · April 2026
Performance

L-Carnitine for Fat Burning and Heart Health: What the Research Shows

The fat burning story is partially true. The cardiac story is more compelling and less talked about.

7 min read · April 2026
Longevity

TMG: The $20 Supplement Every NAD+ User Should Be Taking

NAD+ synthesis depletes methyl groups. TMG replenishes them and also reduces homocysteine. It's the missing half of every NAD+ protocol.

7 min read · April 2026
Immune Health

Zinc Picolinate: Why the Form of Zinc You Take Actually Matters

Zinc oxide (the cheap form in most multivitamins) absorbs poorly. Picolinate absorbs significantly better and the immune effects reflect the difference.

7 min read · April 2026
Immune Health

AHCC: The Immune Mushroom Extract with More Clinical Data Than You'd Expect

Over 30 human clinical trials, used in Japanese hospitals for 25 years, and two trials showing HPV clearance.

8 min read · April 2026
Sleep

Best Supplements for Sleep 2026: What Actually Works

Magnesium, glycine, GABA, and L-glutamine: the sleep supplements with real mechanisms, not just relaxation marketing claims.

8 min read · April 2026
Brain Health

Phosphatidylserine: The Brain Supplement That Has More Evidence Than Most

An FDA-qualified health claim, multiple RCTs on memory, and documented cortisol reduction in athletes. This one earns its place.

7 min read · April 2026
Longevity

How to Test Your Biological Age (and the Supplements That Actually Move the Number)

Epigenetic clocks can measure how fast you're aging. Here's how to get tested and what the evidence says you can do about it.

9 min read · April 2026