We compared 10 of the most-reviewed serine (a combined 18,630 customer reviews) and ranked them by verified review count so you can see what real shoppers actually buy.
How we rank it: L-Serine, 900 mg, 120 Veggie Capsules takes our top spot: it's the standout serine in this guide, earning the lead for its strong balance of quality and price.
How we rank it: At #2, L-Serine, Unflavored Powder, 1 lb (454 g) earns its spot for how consistently shoppers reach for it.
How we rank it: We placed L-Serine Powder, AjiPure Amino Acid, Unflavored Powder, 1 lb (454 g) at #3 thanks to its strong balance of quality and price.
How we rank it: L-Serine, 500 mg, 120 Capsules lands at #4 largely for Nutricost's reputation for quality.
How we rank it: We placed L-Serine Powder, Unflavored, 8.1 oz (227 g) at #5 thanks to its strong balance of quality and price.
How we rank it: At #6, L-Serine, 500 mg , 120 Veg Capsules earns its spot for how consistently shoppers reach for it.
How we rank it: We placed L-Serine, 180 Capsules (500 mg per Capsule) at #7 thanks to its strong balance of quality and price.
How we rank it: L-Serine Powder, 8.8 oz (250 g) lands at #8 largely for Vitamatic's reputation for quality.
How we rank it: We placed MEM Food®, Memory & Cognitive Support with MEM Blend, L-Serine, Organic Lion's Mane and Blueberry Juice Powder, 1.12 lb (510 g) at #9 thanks to its certified-organic formula.
How we rank it: Phosphatidyl Serine, 100 mg, 120 Veggie Caps lands at #10 largely for Doctor's Best's reputation for quality.
| # | Product | Brand | Score | Rating | Reviews | Price | |
|---|---|---|---|---|---|---|---|
| 1 | L-Serine, 900 mg, 120 Veggie Capsules | California Gold Nutrition | 9.5 | 4.7 | 1,320 | $10.55 | View → |
| 2 | L-Serine, Unflavored Powder, 1 lb (454 g) | Lake Avenue Nutrition | 9.2 | 4.6 | 765 | $47.41 | View → |
| 3 | L-Serine Powder, AjiPure Amino Acid, Unflavored Powder, 1 lb (454 g) | California Gold Nutrition | 9.2 | 4.6 | 265 | $32.74 | View → |
| 4 | L-Serine, 500 mg, 120 Capsules | Nutricost | 9.6 | 4.8 | 230 | $14.95 | View → |
| 5 | L-Serine Powder, Unflavored, 8.1 oz (227 g) | Nutricost | 9.6 | 4.8 | 142 | $23.95 | View → |
| 6 | L-Serine, 500 mg , 120 Veg Capsules | NOW Foods | 9.6 | 4.8 | 48 | $24.49 | View → |
| 7 | L-Serine, 180 Capsules (500 mg per Capsule) | Double Wood Supplements | 6.0 | 0 | 0 | $19.95 | View → |
| 8 | L-Serine Powder, 8.8 oz (250 g) | Vitamatic | 6.0 | 0 | 0 | $17.10 | View → |
| 9 | MEM Food®, Memory & Cognitive Support with MEM Blend, L-Serine, Organic Lion's Mane and Blueberry Juice Powder, 1.12 lb (510 g) | California Gold Nutrition | 9.1 | 4.5 | 12,753 | $35.09 | View → |
| 10 | Phosphatidyl Serine, 100 mg, 120 Veggie Caps | Doctor's Best | 9.5 | 4.7 | 3,107 | $29.99 | View → |
Our editorial team evaluates every product on the factors that matter most to shoppers, not just price.
We rank by verified customer reviews and rating. For added assurance, we recommend choosing products that carry independent third-party testing or certification. These organisations publish public standards and verified-product listings:
This guide is for general information only and is not medical advice. Consult a qualified professional before starting any supplement.
L-Serine, 900 mg, 120 Veggie Capsules leads with 1,320 verified reviews, followed by L-Serine, Unflavored Powder, 1 lb (454 g) with 765.
L-Serine, 900 mg, 120 Veggie Capsules is the lowest-priced pick at $10.55, with a 4.7/5 rating from 1,320 reviews.
We rank serine primarily by their number of verified customer reviews, a strong signal of real-world popularity, and factor in average rating. We never accept payment for placement.
This guide compares 10 of the most-reviewed serine available, ranked from most to least reviewed.
The products in this comparison were in stock at our last update (2026-10-06). Availability can change, so check the product page for current status.