Prime Day October 2025: Supplements Worth the Hype
20 vetted picks from the most reputable sources with research support
Most Amazon supplement brands are trash.
Proprietary blends. Low potency/purity. Underdosed formulas.
But there are a few worth considering, especially around this time of year. Reputable manufacturers with third-party testing, transparent labeling, & properly-dosed formulations.
This October Prime Day - I’ve done the work for you on what those are. Here are the top deals running today & tomorrow (October 7 - 8) during Amazon’s Prime Day Sale.
Deal #1: PreSleep (Magnesium Glycinate + Glycine + L-Theanine)
Deal: 20% off
Prime Day Cost: $39.99
Servings: 30
Serving Size: ~14g
Find here: LINK
Deal #2: MIRROR SKIN Copper Peptides
Deal: 25% off
Prime Day Cost: $65.99
Size: 0.5 fl oz.
Find here: LINK
Deal #3: Integrative Therapeutics Berberine
Deal: 30% off
Prime Day Cost: $22.05
Servings: 60
Serving Size: 500 mg
Find here: LINK
Deal #4: Nutricost Taurine Powder
Deal: 20% off
Prime Day Cost: $19.16
Servings: 500
Serving Size: 2g
Find here: LINK
Deal #5: Integrative Therapeutics L-Theanine
Deal: 20% off
Prime Day Cost: $17.20
Servings: 30
Serving Size: 200 mg
Find here: LINK
Deal #6: Nutricost L-Glutamine Powder
Deal: 53% off
Prime Day Cost: $23.96
Servings: 200
Serving Size: 5g
Find here: LINK
Deal #7: Pure Encapsulations Inositol Powder
Deal: 20% off
Prime Day Cost: $40.16
Servings: 60
Serving Size: 4.2g
Find here: LINK
Deal #8: Great Lakes Wellness Hydrolyzed Collagen Peptides
Deal: 33% off
Prime Day Cost: $19.99
Servings: 22
Serving Size: 20g
Find here: LINK
Deal #9: Micro Ingredients Organic Acerola Powder
Deal: 20% off
Prime Day Cost: $23.96
Servings: 70
Serving Size: ~3.2g → 544 mg Vitamin C
Find here: LINK
Deal #10: Nutricost Creatine Monohydrate
Deal: 30% off
Prime Day Cost: $29.36
Servings: 200
Serving Size: 5g
Find here: LINK
Deal #11: Integrative Therapeutics Active B-Complex
Deal: 20% off
Prime Day Cost: $14.80
Servings: 30
Serving Size: 2 capsules
Find here: LINK
Deal #12: Viva Naturals Triple Strength Omega 3 Fish Oil (1500 mg EPA + 570 mg DHA)
Deal: 15% off
Prime Day Cost: $48.41
Servings: 90
Serving Size: 2 softgels
Find here: LINK
Deal #13: Nutricost Pure L-Citrulline
Deal: 20% off
Prime Day Cost: $23.96
Servings: 200
Serving Size: 3g
Find here: LINK
Deal #14: Nutricost Zinc Bisglycinate
Deal: 17% off
Prime Day Cost: $9.56
Servings: 120
Serving Size: 50 mg
Find here: LINK
Deal #15: SOLARAY Saffron Extract
Deal: 30% off
Prime Day Cost: $17.59
Servings: 30
Serving Size: 30 mg
Find here: LINK
Deal #16: BergaMet Citrus Bergamot
Deal: 20% off
Prime Day Cost: $31.95
Servings: 60
Serving Size: 1,200 mg
Find here: LINK
Deal #17: Qunol Ubiquinol CoQ10
Deal: 15% off
Prime Day Cost: $31.44
Servings: 60
Serving Size: 200 mg
Find here: LINK
Deal #18: Micro Ingredients Organic Camu Camu Powder
Deal: 17% off
Prime Day Cost: $23.96
Servings: 68
Serving Size: ~5g → 1,000 mg Vitamin C
Find here: LINK
Deal #19: Integrative Therapeutics NAC
Deal: 30% off
Prime Day Cost: $12.25
Servings: 60
Serving Size: 600 mg
Find here: LINK
Deal #20: Momentous Grass-Fed Whey Protein Isolate
Deal: 15% off
Prime Day Cost: $46.71
Servings: 24
Serving Size: ~23g protein
Find here: LINK
That’s a wrap on our top 20 deals for this October’s Prime Day. Happy bargain hunting & until next time.
Your friend,
Phys