Section 02 — Nutrition | Content 6 of 6
Supplementation Guidance
Because GLP-1 medications significantly reduce overall food intake, members on these programs face an elevated risk of micronutrient deficiencies — even while eating a high-quality diet. This guide presents the physician-reviewed supplements most relevant to PeptidesYourWay programs, organized by priority tier, with clinical rationale, recommended dosing, and the best forms to look for.
Tier 1 — Essential · All programs, all members
Tier 2 — Highly Recommended · Most members benefit
Tier 3 — Program-Specific · Based on your goal
Tier 1 — Essential Supplements · All Programs
Essential
Vitamin D3 + K2
Cholecalciferol + Menaquinone-7
Daily Dose2,000–5,000 IU D3
K2 Paired100–200 mcg K2
When to TakeMorning with fat
Monitor25-OH-D blood level
Vitamin D3 functions more like a hormone than a vitamin — it directly regulates immune function, insulin sensitivity, calcium absorption, bone mineral density, mood, and inflammation. Studies consistently show that 70–80% of individuals with obesity or metabolic dysfunction are deficient in vitamin D, and GLP-1 therapy does not correct this. Deficiency is linked to impaired weight loss response, poor mood, muscle weakness, and increased inflammation — all of which undermine your program.
K2 is paired with D3 because vitamin D increases calcium absorption — K2 directs that calcium into bones rather than soft tissues and arteries. Always take D3 and K2 together. Vitamin D is fat-soluble — take with a meal containing fat (avocado, olive oil, eggs) for maximum absorption.
K2 is paired with D3 because vitamin D increases calcium absorption — K2 directs that calcium into bones rather than soft tissues and arteries. Always take D3 and K2 together. Vitamin D is fat-soluble — take with a meal containing fat (avocado, olive oil, eggs) for maximum absorption.
Best Forms: Softgel or oil-based capsule (far better absorbed than tablets). Look for D3 (cholecalciferol), not D2 (ergocalciferol). K2 as MK-7 (menaquinone-7) is the most bioactive and longest-lasting form. Brands like Thorne, NOW Foods, and Pure Encapsulations offer verified formulations.
Essential
Magnesium
Glycinate · Malate · Citrate — form matters
Daily Dose300–400 mg elemental
Best TimeEvening / before bed
With Food?Yes — reduces GI upset
CautionKidney disease — consult MD
Magnesium participates in over 300 enzymatic reactions in the body — including muscle contraction and relaxation, protein synthesis, blood sugar regulation, nerve function, and sleep quality. The 2025 cross-sectional study found GLP-1 patients had significantly insufficient magnesium intake, and a case report in the American Journal of Case Reports (2025) documented severe hypomagnesemia directly linked to semaglutide use. On high-protein diets, magnesium demands increase further.
Symptoms of deficiency include: muscle cramps and spasms, poor sleep, constipation, anxiety, heart palpitations, and headaches — all common complaints on GLP programs that are often incorrectly attributed to the medication itself.
Take in the evening — magnesium promotes muscle relaxation and dramatically improves sleep quality, which is critical for recovery and muscle protein synthesis.
Symptoms of deficiency include: muscle cramps and spasms, poor sleep, constipation, anxiety, heart palpitations, and headaches — all common complaints on GLP programs that are often incorrectly attributed to the medication itself.
Take in the evening — magnesium promotes muscle relaxation and dramatically improves sleep quality, which is critical for recovery and muscle protein synthesis.
Best Forms — Form Matters Significantly: Magnesium Glycinate (best for sleep, anxiety, muscle relaxation — most gentle on digestion) · Magnesium Malate (best for energy and muscle fatigue) · Magnesium Citrate (good general option, mild laxative effect at higher doses — helpful for GLP-related constipation). Avoid Magnesium Oxide — it has less than 4% absorption rate and is essentially useless as a supplement.
Essential
Omega-3 Fish Oil
EPA + DHA · Triglyceride Form Preferred
Daily Dose2,000–3,000 mg combined EPA+DHA
WhenWith largest meal
StorageRefrigerate after opening
Check LabelEPA+DHA content, not total oil
Omega-3 fatty acids (EPA and DHA) are the most potent natural anti-inflammatory compounds available without a prescription. They directly reduce production of inflammatory prostaglandins, lower triglycerides, support cardiovascular health, improve insulin sensitivity, and support brain function and mood. The 2025 Obesity Pillars narrative review specifically recommends omega-3 supplementation as a beneficial adjunct to GLP-1 therapy for its anti-inflammatory, metabolic, and lean mass preservation properties.
For members on the Recovery & Repair program, omega-3 supplementation is especially important — EPA in particular has been shown to reduce joint inflammation, CRP levels, and TNF-α. For the Metabolic Reset program, omega-3s improve insulin sensitivity and support the cardiovascular benefits of weight loss. Always check the label for actual EPA + DHA content — not total fish oil volume, which is often mostly filler.
For members on the Recovery & Repair program, omega-3 supplementation is especially important — EPA in particular has been shown to reduce joint inflammation, CRP levels, and TNF-α. For the Metabolic Reset program, omega-3s improve insulin sensitivity and support the cardiovascular benefits of weight loss. Always check the label for actual EPA + DHA content — not total fish oil volume, which is often mostly filler.
Best Forms: Triglyceride-form fish oil absorbs significantly better than ethyl ester form. Nordic Naturals, Carlson, and Thorne are consistently third-party verified for purity and potency. Keep refrigerated after opening to prevent oxidation (rancid fish oil is pro-inflammatory, the opposite of the goal). If you experience "fish burps," take with your largest meal or try an enteric-coated capsule.
Essential
Vitamin B12
Methylcobalamin — active form
Daily Dose500–1,000 mcg oral
Best FormSublingual or methylcobalamin
WhenMorning (energy support)
MonitorB12 serum at quarterly check-in
Vitamin B12 is critical for red blood cell formation, neurological function, DNA synthesis, and energy metabolism. GLP-1 medications slow gastric acid production and reduce intrinsic factor availability — both essential for B12 absorption from food. Reduced food intake compounds this further. B12 deficiency develops silently over months and manifests as fatigue, brain fog, tingling extremities, mood changes, and in severe cases, irreversible nerve damage.
The joint advisory from the American College of Lifestyle Medicine and the Obesity Medicine Association specifically lists B12 as a recommended supplement for all GLP-1 patients. Your B12 level will be monitored at your quarterly check-in lab work.
The joint advisory from the American College of Lifestyle Medicine and the Obesity Medicine Association specifically lists B12 as a recommended supplement for all GLP-1 patients. Your B12 level will be monitored at your quarterly check-in lab work.
Best Forms: Methylcobalamin is the active, bioavailable form — far superior to cyanocobalamin (the cheap synthetic version in most drugstore brands). Sublingual (under-the-tongue) tablets or liquid bypasses digestive absorption issues entirely and is the most efficient delivery method, especially for patients with GI symptoms.
Tier 1 — Special Feature · Fiber
🌾 Featured Supplement — Critical for All GLP Programs
Dietary Fiber — The Most Underrated Essential
Fiber is perhaps the single most neglected nutrient on GLP-1 programs — and one of the most consequential. Because GLP medications dramatically reduce food volume, most members consume far less fiber than they need. The 2025 clinical cross-sectional study found GLP-1 patients averaged only 14.5 grams of fiber per day — barely half the recommended 25–38 grams. This deficit directly causes or worsens constipation (one of the most common GLP side effects), disrupts the gut microbiome, reduces cholesterol clearance, slows metabolic rate, and increases hunger between meals.
Fiber is not just a digestive aid — it is a metabolic tool. Soluble fiber (found in oats, psyllium husk, chia seeds, and legumes) forms a gel in the digestive tract that slows glucose absorption, reduces post-meal insulin spikes, lowers LDL cholesterol, and feeds beneficial gut bacteria that produce short-chain fatty acids (SCFAs) — compounds that improve insulin sensitivity and reduce systemic inflammation. Insoluble fiber adds bulk, speeds intestinal transit, and prevents the constipation that is so common and uncomfortable on GLP therapy.
How to Hit Your Fiber Target
- Psyllium husk powder — 1–2 tsp in water or a smoothie once daily. One of the most concentrated fiber sources available. Start with 1 tsp and increase gradually to prevent bloating. Drink immediately after mixing and follow with 8 oz water.
- Chia seeds — 1–2 tbsp daily adds 5–10g of soluble + insoluble fiber. Stir into Greek yogurt, smoothies, or overnight oats.
- Ground flaxseed — 1–2 tbsp daily. Rich in soluble fiber and omega-3 ALA. Always use ground (not whole) — whole flaxseeds pass through largely undigested.
- Non-starchy vegetables — broccoli, spinach, kale, brussels sprouts, asparagus, and cauliflower at every meal. These are your highest-impact fiber and micronutrient sources combined.
- Legumes — lentils (15g fiber/cup), black beans (15g/cup), chickpeas. Excellent fiber density alongside protein. Rinse canned legumes to reduce gas-causing oligosaccharides.
Fiber & GLP Side Effect Management
- Constipation — the most common GLP GI complaint. Psyllium husk (soluble) + magnesium citrate is the most effective clinical combination. Increase water to 100+ oz daily alongside fiber increases.
- Start low, go slow — introducing too much fiber too quickly dramatically worsens bloating and gas on GLP therapy. Add 5g of additional fiber per week until you reach 25–30g daily. Do not rush this.
- Soluble fiber before meals — a glass of psyllium husk 15–20 minutes before eating further enhances GLP-induced satiety and slows glucose absorption from the meal that follows.
- Fermented fiber sources — sauerkraut, kimchi, and plain kefir (if dairy is tolerated) provide both prebiotic fiber and live probiotics that support the gut microbiome changes occurring during GLP therapy.
- Avoid fiber supplements with sugar — many commercial fiber gummies and flavored psyllium products contain significant added sugar. Use plain psyllium husk powder (unflavored) or ground flaxseed as your primary supplement sources.
Tier 2 — Highly Recommended · Most Members Benefit
Highly Recommended
Zinc
Picolinate or Bisglycinate · Best absorbed forms
Daily Dose15–30 mg elemental zinc
WhenEvening with food
Not WithCalcium supplements
Upper Limit40 mg/day — do not exceed
Zinc is essential for immune function, wound healing, protein synthesis, testosterone production, and the activity of over 300 enzymes — including those responsible for growth hormone signaling. For members on the Lean Muscle & Performance protocol, zinc is particularly critical — it directly supports testosterone levels and IGF-1 production, both of which drive muscle protein synthesis. Reduced food intake on GLP programs commonly leads to insufficient zinc from diet alone, as the best sources (shellfish, red meat, seeds) are eaten in smaller quantities.
Do not exceed 40 mg/day of elemental zinc — chronic excess suppresses copper absorption and can cause GI distress. Take with food in the evening to reduce nausea.
Do not exceed 40 mg/day of elemental zinc — chronic excess suppresses copper absorption and can cause GI distress. Take with food in the evening to reduce nausea.
Best Forms: Zinc Picolinate and Zinc Bisglycinate are significantly better absorbed than zinc oxide or zinc sulfate (common in cheap supplements). Take separately from calcium or iron supplements — these compete for absorption at the same receptor sites.
Highly Recommended
Collagen Peptides
Hydrolyzed Collagen · Types I, II & III
Daily Dose10–20g powder
Best TimeMorning or pre-workout
Pair WithVitamin C (enhances synthesis)
InCoffee, broth, smoothies
Collagen is the most abundant protein in the human body — the structural foundation of skin, joints, tendons, ligaments, gut lining, and bone. During rapid weight loss on GLP therapy, collagen synthesis can slow significantly, contributing to joint discomfort, skin laxity, and gut permeability issues. Collagen peptides provide glycine, proline, and hydroxyproline — the specific amino acids that support collagen synthesis in connective tissue and the gut lining. These are largely absent from standard protein sources like chicken and eggs.
The 2025 Obesity Pillars review specifically includes collagen among the protein supplements recommended for GLP-1 patients to preserve lean mass and support connective tissue health. Always pair collagen with a vitamin C source (lemon juice, berries, or a supplement) — vitamin C is a required cofactor for collagen synthesis in the body. Without it, the collagen you consume cannot be fully utilized.
The 2025 Obesity Pillars review specifically includes collagen among the protein supplements recommended for GLP-1 patients to preserve lean mass and support connective tissue health. Always pair collagen with a vitamin C source (lemon juice, berries, or a supplement) — vitamin C is a required cofactor for collagen synthesis in the body. Without it, the collagen you consume cannot be fully utilized.
Best Forms: Unflavored hydrolyzed collagen peptide powder dissolves completely in hot or cold liquids without affecting taste — add to coffee, bone broth, smoothies, or soups. Vital Proteins, Sports Research, and Ancient Nutrition are well-regarded options with third-party testing. Collagen is not a complete protein (no tryptophan) — use it in addition to, not instead of, your primary protein sources.
Highly Recommended
Probiotics
Multi-Strain · 10–50 Billion CFU
Daily CFU10–50 billion CFU
StrainsLactobacillus + Bifidobacterium
WhenMorning on empty stomach or with meal
StorageRefrigerated preferred
GLP-1 medications alter gut motility significantly — slowing digestion and changing the gut environment. This directly impacts the gut microbiome, the community of trillions of bacteria that regulate digestion, immune function, inflammation, mood, and even metabolic rate. The 2025 PMC narrative review recommends probiotics specifically to reduce constipation, improve stool consistency, and support the gut microbiome changes occurring during GLP therapy.
Lactobacillus acidophilus and Bifidobacterium longum strains have the strongest evidence for reducing GLP-associated GI side effects. A multi-strain formula is superior to single-strain products. Look for at least 10 billion CFU per dose and strains that are third-party verified for viable count.
Lactobacillus acidophilus and Bifidobacterium longum strains have the strongest evidence for reducing GLP-associated GI side effects. A multi-strain formula is superior to single-strain products. Look for at least 10 billion CFU per dose and strains that are third-party verified for viable count.
Best Forms: Refrigerated probiotics maintain higher viable counts than shelf-stable versions. Garden of Life, Culturelle, and Seed are well-studied multi-strain options. If taking an antibiotic for any reason, always separate probiotic timing by at least 2 hours, and double your probiotic intake during and for 2 weeks after the antibiotic course.
Highly Recommended
High-Quality Multivitamin
Comprehensive Micronutrient Insurance
DoseAs directed (typically 1–2 daily)
WhenWith breakfast meal
Key FormsMethylated B vitamins preferred
AvoidGummies (high sugar, low dose)
The joint advisory from four major American medical societies explicitly recommends a quality multivitamin for all GLP-1 patients to offset the micronutrient gaps created by reduced food intake. The 2025 cross-sectional study found GLP-1 patients had clinically low intake of vitamins A, C, D, and E alongside magnesium, potassium, and fiber. A comprehensive multivitamin addresses the broad spectrum of these deficiencies without requiring multiple individual supplements.
Quality matters enormously with multivitamins. Most drugstore brands use cheap synthetic forms of B vitamins (folic acid vs. methylfolate, cyanocobalamin vs. methylcobalamin) that are poorly utilized. Look for products with methylated B vitamins, D3 (not D2), and chelated mineral forms. If your multivitamin already contains D3, zinc, and magnesium, adjust your individual doses of those supplements accordingly.
Quality matters enormously with multivitamins. Most drugstore brands use cheap synthetic forms of B vitamins (folic acid vs. methylfolate, cyanocobalamin vs. methylcobalamin) that are poorly utilized. Look for products with methylated B vitamins, D3 (not D2), and chelated mineral forms. If your multivitamin already contains D3, zinc, and magnesium, adjust your individual doses of those supplements accordingly.
Best Forms: Capsule or tablet (avoid gummies — they contain sugar and deliver inconsistent doses). Thorne Basic Nutrients, Pure Encapsulations ONE, and Garden of Life mykind Organics are physician-grade options with bioavailable forms. Take with breakfast — fat-soluble vitamins (A, D, E, K) require dietary fat for absorption.
Tier 3 — Program-Specific Supplements
Program-Specific
Creatine Monohydrate
The Most Evidence-Backed Performance Supplement
Daily Dose3–5g daily
Loading PhaseOptional: 20g/day × 5 days
WhenPost-workout (or any time)
CautionKidney disease — avoid
Creatine monohydrate is the single most research-backed supplement for lean muscle gain, strength improvement, and muscle preservation during caloric restriction. It works by increasing phosphocreatine stores in muscle cells, allowing for greater ATP (energy) production during short, intense efforts — directly improving performance in resistance training. On GLP therapy, where muscle loss is a significant risk, creatine has been specifically highlighted in the 2025 Obesity Pillars review as beneficial for preserving lean mass.
Creatine also draws water into muscle cells (intracellular hydration) — members may notice a 1–3 lb increase on the scale when beginning creatine. This is not fat — it is intramuscular water, which is metabolically beneficial. Do not stop creatine due to this temporary scale increase. Members with any kidney condition must avoid creatine and discuss with their physician.
Creatine also draws water into muscle cells (intracellular hydration) — members may notice a 1–3 lb increase on the scale when beginning creatine. This is not fat — it is intramuscular water, which is metabolically beneficial. Do not stop creatine due to this temporary scale increase. Members with any kidney condition must avoid creatine and discuss with their physician.
Best Forms: Plain creatine monohydrate powder — the cheapest and most extensively studied form. Creatine HCl and buffered creatine cost significantly more with no proven advantage. Mix 3–5g in water, juice, or a protein shake. No need for loading phase unless you want faster saturation.
Program-Specific
Whey Protein Isolate
Post-Workout & Protein Gap Insurance
Per Serving25–40g protein
Daily Use1–3 shakes as needed
Best TimePost-workout within 45 min
AlternativePea protein if dairy-free
When GLP medications suppress appetite severely, hitting daily protein targets through food alone becomes extremely difficult. Whey protein isolate provides a convenient, fast-digesting, leucine-rich protein source that can bridge the gap. Whey protein is the highest leucine-content protein source available — and leucine is the specific amino acid that directly activates muscle protein synthesis (MPS). The 2025 Obesity Pillars review specifically recommends whey protein supplementation to preserve lean mass during GLP-1 therapy.
Whey isolate (not concentrate) is preferred for members with dairy sensitivity — it contains less lactose and is more highly processed to remove fat and carbohydrates, delivering more pure protein per serving.
Whey isolate (not concentrate) is preferred for members with dairy sensitivity — it contains less lactose and is more highly processed to remove fat and carbohydrates, delivering more pure protein per serving.
Best Forms: Whey protein isolate (WPI) over concentrate — higher protein percentage, lower lactose. For dairy-free: pea protein isolate is the best plant-based alternative with a favorable amino acid profile. Third-party tested brands: Transparent Labs, Legion Athletics, and Thorne. Avoid products with sucralose, artificial colors, or proprietary blends that obscure actual protein content.
Program-Specific
Electrolyte Supplement
Sodium · Potassium · Magnesium — No Sugar
Sodium500–1,000 mg/day supplement
Potassium200–400 mg/day
WhenMorning or around training
FormNo-sugar powder packets
Rapid weight loss on GLP therapy — particularly in the first 4–8 weeks — causes significant loss of sodium, potassium, and magnesium through increased urination and reduced food intake. Symptoms of electrolyte depletion include headaches, dizziness, muscle cramps, heart palpitations, fatigue, brain fog, and nausea — all frequently misattributed to the medication itself. Replacing electrolytes daily resolves these symptoms in the majority of members who experience them.
Members on high-protein diets (Lean Muscle protocol) have even greater electrolyte needs — high protein metabolism increases urinary calcium and magnesium excretion. Members who exercise regularly lose additional electrolytes through sweat. LMNT, Liquid IV (no-sugar version), and Nuun Sport are the most commonly recommended no-sugar options in clinical practice.
Members on high-protein diets (Lean Muscle protocol) have even greater electrolyte needs — high protein metabolism increases urinary calcium and magnesium excretion. Members who exercise regularly lose additional electrolytes through sweat. LMNT, Liquid IV (no-sugar version), and Nuun Sport are the most commonly recommended no-sugar options in clinical practice.
Best Options: LMNT (no sugar, high sodium — ideal for active members), Nuun Sport (lower sodium, good for light activity), and homemade (a pinch of sea salt + cream of tartar in water for potassium). Avoid electrolyte products with sugar or artificial sweeteners — they undermine the dietary goals of your program. Members with high blood pressure should use lower-sodium electrolyte formulations and discuss with their physician.
Your Daily Supplement Schedule
A practical, time-based guide to taking your supplements for maximum absorption and minimum interference
🌅 Morning
Empty Stomach
Empty Stomach
Probiotics (if taking on empty stomach) · Electrolyte packet in 16 oz water · B12 sublingual (dissolve under tongue before eating)
Wait 15–20 minutes before breakfast if possible
Wait 15–20 minutes before breakfast if possible
🍳 Breakfast
Multivitamin (with food — fat-soluble vitamins need dietary fat) · Vitamin D3 + K2 (with any fat-containing meal) · Omega-3 Fish Oil (with largest fat-containing meal of the day)
Do not take B12 at the same time as your multivitamin if it already contains B12 — no need for duplication
Do not take B12 at the same time as your multivitamin if it already contains B12 — no need for duplication
💪 Pre-Workout
Creatine monohydrate 3–5g (can also be taken post-workout — timing is flexible) · Electrolytes if exercising intensely
Whey protein shake 30–60 minutes pre-workout is optional but beneficial for intense training sessions
Whey protein shake 30–60 minutes pre-workout is optional but beneficial for intense training sessions
🔄 Post-Workout
Whey protein shake 25–40g (within 45 minutes) · Collagen peptides 10–15g (can mix into shake) with a squeeze of lemon for vitamin C
Post-workout is the most critical nutrition window of the day on the Lean Muscle protocol
Post-workout is the most critical nutrition window of the day on the Lean Muscle protocol
🌙 Evening / Bed
Magnesium glycinate 300–400 mg (promotes muscle relaxation and deep sleep) · Zinc 15–30 mg (take with food to prevent nausea, separate from calcium)
These two supplements together are one of the most effective evening recovery combinations — improved sleep dramatically improves fat loss, muscle repair, and hormone balance
These two supplements together are one of the most effective evening recovery combinations — improved sleep dramatically improves fat loss, muscle repair, and hormone balance
🌾 Daily
Any Time
Any Time
Fiber supplement — psyllium husk 1–2 tsp in water (best 15–20 min before a meal, or at bedtime in water) · Ground flaxseed 1–2 tbsp in food · Chia seeds 1 tbsp in yogurt or smoothie
Always take fiber supplements with a full glass of water (8–10 oz minimum) and drink additional water throughout the day. Fiber without adequate water causes more constipation, not less.
Always take fiber supplements with a full glass of water (8–10 oz minimum) and drink additional water throughout the day. Fiber without adequate water causes more constipation, not less.