SCIENCE-BACKED SUPPLEMENTS · CLINICALLY STUDIED INGREDIENTS
Every GreenLeaf formula is built on clinical studies, dosed at levels proven to work, and independently third-party tested. No proprietary blends, no hidden filler, no marketing hype — just supplements developed by nutritional biochemists and made for people who want the truth on the label.
MOST LOVED
Our most-loved formulas — clinically studied ingredients at effective doses. Every formula developed by our in-house nutritional biochemist, every batch third-party tested.
Vitamins
Complete daily nutrition in one capsule
or $34.99 once
Wellness
16 strains for complete gut health
or $39.99 once
Vitamins
Liquid sunshine for bone & immune health
or $24.99 once
BY NEED
Whether you’re filling a nutritional gap, supporting daily performance, or targeting a specific outcome — start with the category that fits.
VITAMINS
Complete multivitamins and individual vitamins at clinically effective doses.
12 products
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SUPPLEMENTS
Science-backed formulas for sleep, stress, immunity, and focus.
18 products
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PROTEIN
Grass-fed whey, plant-based blends, and hydrolyzed collagen.
8 products
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WELLNESS
Probiotics, digestive enzymes, and ingredient-led wellness formulas.
15 products
Shop categoryWHY GREENLEAF
The supplement industry is full of proprietary blends, undisclosed doses, and marketing over science. We built GreenLeaf to prove it doesn’t have to be that way.
Every batch, every time.
Every batch of GreenLeaf supplements undergoes independent third-party lab testing for purity, potency, heavy metals, and microbial contamination. Testing is performed by ISO-accredited laboratories — not our own facility — because results you can trust require independence. Your bottle's Certificate of Analysis is available by lot number on our website.
→ ISO 17025 accredited testing · Every batch · Public lot-number lookup
Formulated by biochemists, not marketers.
Our formulas are developed by Dr. Sarah Chen, PhD (Nutritional Biochemistry, Stanford) with clinically studied ingredients at effective doses. When we say 500mg turmeric, we mean 500mg of Curcuma longa root extract standardized to 95% curcuminoids — not "proprietary turmeric blend." Every ingredient choice is backed by peer-reviewed research, not marketing trends.
→ PhD-formulated · Clinically effective doses · Peer-reviewed evidence
No proprietary blends. Ever.
Every ingredient is listed with its exact amount — no proprietary blends hiding actual doses, no "natural flavors" hiding undisclosed compounds, no filler ingredients. If it's in the bottle, it's on the label with its source and its amount. We believe you have the right to know exactly what you're putting in your body.
→ Zero proprietary blends · Full dose disclosure · Source identification
Responsibility throughout the supply chain.
We partner only with suppliers who meet our standards for environmental impact, worker treatment, and ingredient traceability. Our packaging is 100% recyclable, our shipping is carbon-neutral, and our operations are powered by renewable energy. We publish an annual sustainability report with specific metrics — not vague claims.
→ 100% recyclable packaging · Carbon-neutral shipping · Annual impact reporting
REAL CUSTOMERS
Every review below is from a verified customer purchase. We don’t pay for reviews, we don’t gift products to influencers, and we don’t edit what our customers say.
“I have been taking the Daily Multivitamin for three months now and the difference in my energy levels is remarkable. I love that I can trust what is on the label.”
Sarah M.
Portland, OR
Verified Purchase
“The Probiotic has completely transformed my digestion. No more bloating after meals, and I feel lighter throughout the day. Best probiotic I have ever tried.”
James R.
Austin, TX
Verified Purchase
“The Marine Collagen is a game-changer for my skin. After six weeks, my complexion looks more even and my nails are stronger than ever. Totally worth it.”
Emily K.
Denver, CO
Verified Purchase
FROM THE RESEARCH
Our in-house biochemist writes about supplement research, ingredient efficacy, and the science behind every GreenLeaf formula.
The standard 400 IU dose in most multivitamins is based on 1960s research. Here's what the clinical literature says today about effective dosing for immunity, bone health, and mood.
Not all magnesium is equal. Bioavailability, absorption, and the effect you want (sleep vs. constipation vs. muscle recovery) all depend on the form. A straightforward breakdown.
Fat-soluble vitamins need fat. Iron and calcium don't mix. And zinc with copper can cause problems over time. A practical guide to getting more from your routine.
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