Vitamins You Need
Evidence-based supplements for GLP-1 and peptide users — click any card for full details
Multivitamin for:
Vitamin C 1000mg
EssentialDose1,000–2,000mg/day, split doses
WhenMorning + evening
Daily2 caplets/day
Collagen synthesis, skin elasticity, immune support
RDA (90mg) is minimum deficiency prevention — 1,000–2,000mg is the therapeutic dose for collagen support and skin repair during rapid weight loss
Collagen Peptides Powder 1LB
EssentialDose10–20g/day (1–2 scoops)
WhenMorning with Vitamin C
Daily1 scoop/day (11g)
Rebuilds skin structure and elasticity during rapid fat loss
Takes 8–12 weeks for visible skin improvement. Always take alongside Vitamin C — required for collagen synthesis. For 75+ lb loss, consider 2 scoops/day (22g).
Triple Strength Omega-3 Fish Oil
EssentialDose700–2,100mg EPA+DHA/day
WhenWith a meal
Daily1 softgel/day
Anti-inflammatory, cardiovascular health, skin cell integrity
EPA+DHA supports satiety and muscle protein synthesis — directly complements GLP-1 therapy. At 1 softgel/day the 120-count lasts 4 months at $0.28/day.
Vitamin K2 (MK7) + D3 5,000 IU
EssentialDose5,000 IU D3 + 100mcg K2 MK-7
WhenMorning with a fatty meal
Daily1 softgel/day
Bone density, calcium metabolism, immune function
Obese individuals have 35% higher Vitamin D insufficiency — fat tissue sequesters D3, requiring 4,000–5,000 IU just to reach adequate blood levels. Get a 25-OH-D blood test to establish baseline.
Magnesium Glycinate 500mg
EssentialDose180mg elemental/day (2 capsules)
WhenEvening / bedtime
Daily2 capsules/day
Sleep quality, muscle relaxation, 300+ enzymatic reactions
GLP-1 side effects — muscle cramps, fatigue, poor sleep, anxiety — are often magnesium deficiency, not the medication itself. Glycinate is the only form appropriate for GLP-1 users (gentlest on digestion).
Nu-Salt Potassium Chloride
EssentialDose¼–1 tsp/day (~650–2,600mg potassium)
WhenThroughout day in food or drinks
Daily¼–1 tsp/day
Potassium electrolyte — prevents cramps, fatigue, heart palpitations
98% of Americans are potassium deficient before GLP-1 therapy. OTC capsule supplements capped at 99mg each — would need 25–30 capsules for a therapeutic dose. Nu-Salt delivers 2,600mg per teaspoon.
Creatine Monohydrate 600g
EssentialDose5g/day — no loading phase needed
WhenAny time — daily consistency matters most
Daily5g/day (½ tbsp)
Preserves lean muscle mass and cognitive function during calorie restriction
25–40% of GLP-1 weight loss can be lean muscle — not fat. Creatine directly combats this. No supplement is more studied or safer. Reaches full muscle saturation in 3–4 weeks.
Multivitamin + Probiotics (Men <50)
EssentialDose2 capsules/day
WhenMorning with food
Daily2 capsules/day
Premium multi with probiotic enzyme blend — directly addresses GLP-1 GI side effects
Only multi in the stack with a probiotic enzyme blend — the strongest choice for GLP-1 users with significant nausea or GI issues. Methylated B12 (methylcobalamin) at 2,500% DV for maximum bioavailability.
One A Day Men's 50+ Multivitamin
EssentialDose1 tablet/day
WhenMorning with food
Daily1 tablet/day
Daily micronutrients — high B12, Chromium 514% DV, no iron (correct for men 50+)
No iron — correct for men 50+. Iron accumulates and becomes harmful in older men. B12 at 1,042% DV addresses age-related absorption decline compounded by GLP-1 GI effects.
One A Day Women's Multivitamin
EssentialDose1 tablet/day
WhenMorning with food
Daily1 tablet/day
Pre-menopausal coverage — 18mg iron (essential), folate, biotin for hair loss
Must include iron (18mg) for pre-menopausal women — DO NOT use men's or 50+ women's formulas (they contain no iron). GLP-1-induced rapid weight loss commonly causes hair thinning — biotin at 150% DV addresses this.
One A Day Women's 50+ Multivitamin
EssentialDose1 tablet/day
WhenMorning with food
Daily1 tablet/day
Post-menopausal bone support — higher D3 (1,000 IU), no iron, biotin for hair
Higher D3 (1,000 IU vs 700 IU in men's formula) due to accelerated post-menopausal bone loss. No iron — correct post-menopause. Iron needs drop from 18mg to 8mg after menopause.
Calcium Magnesium Zinc + D3
OptionalDose3 tablets/day (split — max 2 at once)
WhenWith meals, split doses
Daily3 tablets/day
Bone health — only needed if you don't consume dairy daily
OPTIONAL: Skip if you eat milk, cheese, or yogurt daily. Dairy calcium has superior anti-obesity effects vs supplemental calcium. Only supplement if dairy is absent from your diet.
CeraVe Moisturizing Cream 19oz
Skin CareDoseApply liberally — face, neck, abdomen, arms, thighs
WhenAfter shower + throughout day
DailyApply liberally as needed
Skin barrier hydration — prevents permanent laxity during rapid fat loss
MVE technology releases ceramides + hyaluronic acid continuously for 24 hours. Apply generously to areas losing fat fastest: abdomen, inner arms, thighs. Works from outside while collagen peptides + Vitamin C work from inside.
CeraVe Skin Renewing Night Cream
Skin CareDosePea-to-dime sized amount to clean face
WhenLast step of PM routine, nightly
DailyPea-sized amount nightly
Overnight collagen signaling via peptides while you sleep
Tripeptide-1 and Caprooyl Tetrapeptide-3 directly signal fibroblasts to produce collagen and elastin — the exact mechanism that causes skin laxity during rapid fat loss. Use sandwich method with tretinoin.
CeraVe AM Facial Moisturizer SPF 30
Skin CareDoseApply every morning — last step of AM routine
WhenEvery morning, 15 min before sun exposure
DailyApply every morning
UV protection — prevents collagen breakdown that reverses all rejuvenation efforts
MANDATORY with tretinoin — increases photosensitivity dramatically. Daily SPF is the single most evidence-backed anti-aging intervention available. UV damage is cumulative and irreversible.
KLOW80 Peptide Stack
ResearchDose17 units subcutaneous injection once daily
WhenMorning, subcutaneous injection
Daily17 units SQ injection daily
GHK-Cu + BPC-157 + TB-500 + KPV — skin rejuvenation and gut healing
NOT FDA APPROVED — Research compound. GHK-Cu directly stimulates collagen synthesis. BPC-157 + KPV provide dual gut-healing benefit uniquely suited to GLP-1 users managing nausea and GI issues.
Tretinoin 0.025% Cream
Prescription OnlyDosePea-sized — start 2x/week, work up to nightly
WhenNightly only (photosensitive — never daytime)
DailyPea-sized amount nightly
Gold standard prescription retinoid — directly stimulates dermal collagen production
RX ONLY — Ask Your Doctor. Clinical studies confirm increased dermal collagen synthesis, improved skin thickness, reversal of UV damage. SPF 30+ every morning is NON-NEGOTIABLE when using tretinoin.
Potassium Citrate 10mEq
Prescription OnlyDose10–20mEq (1,000–2,000mg) 3x/day
WhenWith meals, 3 times per day
Daily10–20mEq 3x/day with meals
Kidney stone prevention — alkalinizes urine during rapid weight loss
RX ONLY — Ask Your Doctor. Rapid weight loss dramatically increases uric acid excretion — same mechanism as gout flares. Citrate alkalinizes urine to pH 6.5–7.0, preventing both uric acid and calcium oxalate stone formation.