Learn & Help

Everything to feel confident
about what you're taking.

The Loft Journal, our registered dietitian team, ingredient glossaries, shipping & returns, and every answer we get asked most — all in one place.

The Loft JournalEvidence-based writing, reviewed by RDs.

Every article is written and peer-reviewed by our in-house registered dietitians. No fluff, no hype, no pseudoscience — just clear guidance you can actually act on.

Essentials

How much Vitamin D do you actually need?

Reviewed by Sarah Kim, RD · 6 min read
Deep dive

Magnesium glycinate vs. citrate: which is right for you?

Reviewed by Marco Esposito, RD · 8 min read
Routine guide

The starter stack: what to try first if you're new to supplements

Reviewed by Priya Nair, RD · 5 min read
Sleep

The truth about melatonin dosing — why more isn't better

Reviewed by Sarah Kim, RD · 7 min read
Gut

Probiotics 101: what the research actually says

Reviewed by Priya Nair, RD · 9 min read
Performance

Creatine: the one supplement with the most evidence behind it

Reviewed by Marco Esposito, RD · 6 min read
Meet our RDsThree registered dietitians review every routine.

Every supplement routine we recommend is personally reviewed by a member of our RD team. If a product doesn't fit you, they'll say so — even if it costs us a sale. Book a free 15-minute consult on your first order.

Sarah Kim, RD
Head of VitaminLoft Routines · 12 yrs clinical
Focus areas: sleep, stress, women's health. Former hospital RD at Mount Sinai; master's in clinical nutrition from NYU.
Marco Esposito, RD
Sports & Performance Lead · 9 yrs
Focus areas: protein, creatine, recovery, cardiometabolic. Former team nutritionist for Serie A athletes; CISSN-certified.
Priya Nair, RD
Gut & Immunity Lead · 7 yrs
Focus areas: gut health, probiotics, immune support, plant-based nutrition. Master's in nutritional biochemistry, UNC Chapel Hill.
Ingredient glossaryPlain-English explanations of what's in the bottle.

Short, honest entries for the 50+ ingredients we stock most. Each entry covers: what it is, what the evidence supports, typical dose range, safety notes, and who should skip it.

Magnesium (glycinate, citrate, malate)

A mineral most US adults don't get enough of. Glycinate is gentler on digestion and preferred for sleep; citrate for digestive regularity; malate for energy. Typical dose 200–400 mg.

Vitamin D3

Fat-soluble vitamin your skin makes from sunlight. Most adults do better with 1000–2000 IU daily, ideally paired with K2. Get a blood test before going higher than 4000 IU.

Ashwagandha (KSM-66)

Adaptogenic herb used in Ayurveda for stress. Evidence is reasonable for perceived stress and sleep quality; dose 300–600 mg standardized extract. Avoid if pregnant or on thyroid meds.

Melatonin

Hormone that signals “it's nighttime” to your brain. Paradoxically, less is more: 0.3–3 mg is often more effective than 5–10 mg for sleep onset. Use short-term, not nightly.

Collagen peptides

Hydrolyzed protein that digests easily. Best evidence is for skin elasticity and joint comfort at 10–15 g daily, taken consistently for 8+ weeks.

Creatine monohydrate

The single most-studied sport supplement. 3–5 g daily for most adults supports strength, power, and lean mass. No loading needed.

ReviewsHow we handle reviews.

Every review on VitaminLoft comes from a verified buyer — we match each review to a real order before it's published. We never edit reviews for tone or remove negative feedback. Product pages will show the full review stream as verified-buyer reviews come in.

Reporting a fake review. If you see a review that looks suspicious, email reviews@vitaminloft.com and we'll investigate within 48 hours.

Shipping & returnsWhat to expect after you check out.

Shipping rates

  • Free standard shipping on orders $35+ (US 48 states)
  • Standard (3–5 business days): $3.97
  • Expedited (2 business days): $9.97
  • Overnight: $19.97
  • Subscribers: always free, no minimum

Processing time

Most orders ship within 1 business day. You'll get a tracking email as soon as your order is handed to the carrier. Subscriptions renew 3 days before your delivery date so you have time to skip or swap.

International

We ship to Canada, UK, EU, Australia and Japan. International rates calculated at checkout; duties and taxes may be charged by your local carrier.

Returns

Didn't love it? We'll refund you within 30 days — no bottle return required. Email hello@vitaminloft.com with your order number.

30-day guaranteeLove it or return it — no bottle needed.
How it works
Try any product for 30 days. If it doesn't fit, email us with your order number and we'll refund the full amount to your original payment method — no return shipping, no restocking fee, no need to mail the bottle back. One claim per customer per product.

Supplements are a trust category. If we can't earn yours, we don't deserve it — and we'd rather refund you than lose it.

FAQThe questions we get most.
Can I skip or pause my subscription?
Yes, any time. You can skip a shipment, change the cadence, swap products, or cancel from your account page — no email required. Changes made 3+ days before your next renewal take effect immediately.
Are VitaminLoft products third-party tested?
Every product we stock is independently tested for purity, potency, and contaminants (heavy metals, microbes, pesticides). Test certificates are linked from each product page under “Batch test results”.
How does the free RD consult work?
After your first order ships, you'll get an email with a link to book a 15-minute video call with one of our registered dietitians.
Is VitaminLoft safe if I'm pregnant, nursing, or on medication?
Always check with your doctor or pharmacist before starting a new supplement in these cases.
Do you offer bulk or wholesale pricing?
We offer a 15% discount on orders over $250 for individuals, and dedicated wholesale accounts for gyms, clinics, and nutritionists. Email wholesale@vitaminloft.com to learn more.
How do I know which supplements I actually need?
Take our 3-minute personalization quiz — it's reviewed by one of our RDs before we send recommendations.
ContactReal humans. Real fast.

Customer care

Questions about an order, subscription, or return? We respond within 4 business hours, Mon–Fri 8am–6pm ET.

RD consultations

Free 15-min video call on your first order, or $29 for additional consults. Book a member of our RD team directly.