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A man hiking in a rugged mountain landscape
June 3, 2026 · 11 min read

Shilajit: What the Research Actually Shows

The honest evidence on shilajit for testosterone, energy, and fertility, the right dose and forms, and the heavy-metal risk that matters most.

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How much protein do women need, a NutraSmarts guide
June 2, 2026 · 11 min read

How Much Protein Do Women Actually Need? (And the Best Protein Powders)

How much protein women really need for muscle, menopause, and weight, the bulky and kidney myths, and how to choose a protein powder.

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NMN and NAD+, do they work, a NutraSmarts guide
June 2, 2026 · 11 min read

NMN, NAD+, and NR: Do Anti-Aging Supplements Actually Work?

What NAD+ boosters really do in humans, NMN vs NR, the FDA regulatory saga, and where the anti-aging hype outruns the evidence.

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New · Deficiency Guide

Spot a deficiency by symptom or risk group

Symptoms, at-risk groups, and clinical context for 26 essential nutrients — sourced from NIH ODS and StatPearls.

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Supplement Facts
Serving Size: 1 Capsule
Servings per container: 30
Amount per Serving%DV
Vitamin C (as Ascorbic Acid)100 mg111%
Vitamin D (as Cholecalciferol)25 mcg125%
Zinc (as Zinc Citrate)5 mg45%
Immune Support Blend350 mg†
Quercetin Dihydrate (from Sophorae japonica Flower Extract), Elderberry Fruit Extract (Sambucus nigra), Echinacea Purpurea Herb Extract
† Daily Value not established.
Other Ingredients: Veggie capsule (hypromellose), white rice flour, stearic acid, silicon dioxide, magnesium stearate.
About NutraSmarts

Evidence-based supplement research, free for everyone

NutraSmarts is an independent, research-grade database of 1,000+ supplement ingredients — each with clinical-trial-backed dosages, mechanisms, side effects, drug interactions, and an honest evidence rating from PubMed-cited human studies, spanning everyday vitamins and minerals to the newest branded ingredients (NuLiv Science, NNB Nutrition, PLT Health Solutions). Browse by category or symptom, compare any two ingredients, explore the deficiency guide, and build FDA-compliant Supplement Facts labels with our 100% free, no-signup tool — every page built to help you tell marketing from evidence.

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