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Compare Scalp Serums

Plain, side-by-side guides for choosing scalp care. We compare product types and label facts, not brands, and we only use numbers that are printed on a label.

Comparisons

Scalp serum vs hair oil

Oils coat the lengths; scalp serums are made for the skin under the hair. How texture, buildup and fine hair change the choice, and how to use both without flat roots.

How to choose a 2DDR serum

Five things to check on any 2-deoxy-D-ribose serum label: stated percentage, base, leave-on or rinse-off, preservative system, and whether it makes drug claims.

How we write these comparisons

  • Label facts only. Percentages and sizes come from printed labels. Where a label does not state something, we say so instead of guessing.
  • No ratings or scores. We do not rank products or publish star ratings.
  • Product types, not competitors. We describe categories, such as oils, gels and rinse-off products, rather than naming other brands.
  • The cosmetic line stays visible. Every guide marks the boundary between a cosmetic, which is about appearance and condition, and a drug.

Keep reading

Formula 01

2.5% 2-DDR · 60 mL · $69.99

Formula 01 states all six active percentages on the label.

  • Secure checkout on the official Synergy45 Shopify store (shop.synergy45.com). It opens in this tab.
  • Processed within 1 business day and shipped the next business day from California to US addresses.
  • $10 shipping on one bottle, free on 2 or more.
  • All sales final; a damaged or incorrect bottle is replaced. Shipping & returns

Cosmetic vs drug

Formula 01 is a high-concentration 2-Deoxy-D-Ribose (2dDR) cosmetic scalp serum for fuller-looking hair, designed to support a revitalized, healthy-looking scalp environment.

It is not a drug. It is not intended to diagnose, treat, cure, or prevent any disease. For any scalp or hair concern, talk to a dermatologist.

Written and reviewed by Synergy45 · Last reviewed: October 2026
Sources and related pages:
Formula 01 label and ingredient list
U.S. FDA: “Is It a Cosmetic, a Drug, or Both? (Or Is It Soap?)”