Vitalspell — Evidence-based supplement science

Scientific illustration of NAD+ molecular structure and cellular aging concepts

Can NMN, NAD+ and resveratrol actually slow aging? Here's what the human evidence says

NMN supplements raise blood NAD+ levels 2.5-fold in human trials, but a 2026 review of 33 studies finds anti-aging benefits remain unproven. Here's what the evidence actually says about the most-hyped longevity compounds.

Dean Okonkwo· 7 min read

Fresh salmon fillet on a wooden cutting board, pink flesh with white fat lines visible

Nutrition

Which oily fish actually give you the most omega-3?

Comprehensive set of brain MRI scans highlighting cranial anatomy for medical use.

Cognitive Health

Why common dementia risks may hit women harder

A Mediterranean meal with vegetables and grains

Nutrition

How this Mediterranean diet trial cut diabetes risk

Supplements

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Does ashwagandha carry liver, gut, or thyroid risks?

Most ashwagandha side effects look mild in short studies, but rare liver injury reports and thyroid cautions make the herb less simple than marketing suggests.

Berberine side effects: what trials say about GI upset and safety

What berberine side effects show up most often?

Do collagen peptides actually help skin? What the clinical trials show

Abstract molecular structure illustration for collagen peptide safety explainer

Are collagen peptides safe? What side-effect studies show

Can berberine help with insulin resistance? What the evidence says

Fitness

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Frontiers performance meta-analysis figure

Does creatine reduce inflammation? What the 2026 evidence actually shows

A fresh pair of 2026 reviews suggests creatine still earns its place as a performance supplement, but the evidence for lowering systemic inflammation remains thin.

Can cold exposure help with weight loss? The brown fat evidence

Beetroot juice shot and supplement capsules on a wooden surface, illustrating sodium nitrate supplementation research

Sodium Nitrate May Block Heart Benefits of Exercise in Women

Creatine monohydrate supplement displayed on a kitchen counter

Why women have less creatine in their brains — and what the evidence says about supplementing it

Longevity

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Can NMN, NAD+ and resveratrol actually slow aging? Here's what the human evidence says

A mouse study puts gut particles at the center of aging

Shirtless man standing in a freezing lake near Ludvika, Sweden, surrounded by snow and ice during winter cold water immersion

Cold Plunges and Your Brain: What the Science Actually Shows

Abstract representation of molecular structures and biological pathways in vibrant colors

Longevity supplement NOVOS Core improved vascular aging markers in first human trial

Detailed close-up of aged black garlic cloves on a dark background

Aged garlic compound nudges the fat-brain-muscle axis longevity researchers chase

Close-up of a white pill bottle with red capsules on a beige background

NMN and NR supplements: what the evidence says about NAD precursors and aging

Gut Health

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Could infant gut microbes shape later ADHD risk?

A new birth-cohort paper linked one-week Bifidobacterium patterns and a microbial metabolite to ADHD diagnoses at age 10. Here is what the data does, and does not, say.

Woman eating a snack in bed late at night

Eating after 9 p.m. under stress may strain the gut

Can probiotics sometimes make gut symptoms worse for some people?

Should healthy adults take a daily probiotic? What the evidence says

Researcher analyzing biological samples under a microscope in a laboratory

Selective eating reshapes the autism gut microbiome — and not for the better

Nutrition

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Which oily fish actually give you the most omega-3?

Which oily fish actually deliver the most EPA and DHA? A 2025 Cambridge review reveals farmed salmon now contains far less omega-3 than it did 20 years ago — here's what to eat instead.

How this Mediterranean diet trial cut diabetes risk

Bunch of grapes casting shadows on a white surface, illustrating the whole-fruit intervention behind the skin study.

Can grapes help protect skin from the sun?

Abstract molecular structure representing the overlapping metabolic and vascular pathways studied in GLP-1 obesity-drug research.

GLP-1 drugs and blood pressure: what 43,000 patients show

Cognitive Health

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Why common dementia risks may hit women harder

Abstract illustration of creatine and sleep-loss cognition

Can creatine blunt sleep-loss brain fog? The 2026 study

Abstract brain and nutrient concept for choline anxiety analysis

Lower brain choline may mark anxiety, not a supplement fix

Omega-3 supplements accelerated cognitive decline in older adults, study finds

Senior man walking alone along a forest pathway, capturing the everyday gait that the Apple-Michigan cohort study tracked.

Hearing loss slows the walk before it dulls the mind

Laboratory glassware and coffee samples arranged for caffeine content analysis

Caffeine improves attention by small but real margins, finds largest meta-analysis to date

Science

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Abstract DNA strands used to illustrate the paper's focus on repair pathways in aging neurons

How APOE2 helps neurons repair DNA and resist aging

APOE2 and brain aging are linked through DNA repair, a 2026 Aging Cell paper found, offering a new clue to why the variant tracks with longer life.

Vibrant closeup of a colorful molecular model illustrating abstract scientific concepts.

What a 2026 vitamin D meta-analysis found in multiple sclerosis

Can cooler asphalt cut toxic emissions? What the Arizona State study found

Wearable sensor patch against a clinical background

A Patch That Reads Hidden Stress — and Why Five Signals Beat One

Close-up of vitamin D3 capsules and box on a clean white surface

Vitamin D at 5,000 IU reduced depression symptoms most in new dose-response analysis

Sleep

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Can saffron help you sleep? What the evidence says

Randomized trials suggest saffron may modestly improve sleep quality over four weeks, but the evidence is still small, short-term and weaker than standard insomnia care.

The Sleep Sweet Spot: 6 to 8 Hours Slows Biological Ageing Across 17 Organs

Magnesium glycinate and melatonin supplement capsules on a nightstand

What Happens to Your Sleep When You Take Magnesium and Melatonin Together

Wearable sleep tech devices and sleep tracking imagery

The Meteoric Rise and Problematic Future of Wearable Sleep Tech

Hormones

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Close-up laboratory-style image suggesting creatine and menopause research

Can creatine help during menopause? What the evidence says

Close-up of a patient consulting a doctor with a clipboard in a medical setting.

The Lancet Just Renamed PCOS. For 170 Million Women, It Changes Everything

Ginkgo leaf and herbal supplement capsules arranged on a marble surface, representing natural adaptogenic supplements

Ashwagandha and multi-herb formula both reduced stress in 60-day trial

Vitex agnus-castus monk's pepper medicinal plant with purple flower spikes and green leaves

Vitex agnus-castus improved oxidative stress markers and insulin resistance in PCOS trial

Fresh edamame soybeans in a bowl with sea salt on a wooden table — whole soybeans are the richest dietary source of daidzein, genistein, and glycitein, the three isoflavones linked to hot flash reduction in the 2025 trial

Soy isoflavones cut severe hot flashes by 92% in 12-week trial

Close-up of vibrant saffron threads on a dark surface, the red stigmas arranged in loose clusters

Saffron and ginseng improve erectile function, meta-analysis of 14 trials finds

Reviews

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Vitamin D plus K2 acts like a drug, not a supplement

An Italian cardiology team's narrative review in IJMS reframes combined vitamin D and K2 as a low-potency pharmacological intervention, arguing that the large neutral RCTs tested the wrong populations and ignored K2 as an essential cofactor.

Assorted legumes, vegetables, nuts, and grains arranged on white plates

Plant-Based Diets Match Omnivore Diets for Athletic Performance, Review Finds

Close-up of white supplement tablets on a clean surface

The Best Magnesium Supplements of 2026, According to Experts

Variety of capsules and powders arranged on a green backdrop

How To Choose the Right Magnesium Supplement for You

Vitamin D plus K2 acts like a drug, not a supplement

Latest research

Longevity

Can NMN, NAD+ and resveratrol actually slow aging? Here's what the human evidence says

May 21, 2026

Nutrition

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