CBD vs. CBG: The Science of Cannabinoids in Skin Barrier Repair

The skin serves as an active site for the Endocannabinoid System (ECS), with receptors (CB1, CB2, TRPV1, and GPR55) embedded throughout the epidermis and sebaceous glands. When cannabinoids are applied topically, they provide exogenous ligands that may interact with these receptors to support homeostasis.

Lipid Regulation and the Acne Profile

For oily, acne-prone skin, CBD may function as a sebostatic agent. It appears to influence sebocytes, potentially modulating the effects of lipids like arachidonic acid to assist in regulating oil production without damaging the gland.

Oil management is only one component of skin health. CBG may offer a different approach as a potential antimicrobial agent. It has shown promise in laboratory settings against Cutibacterium acnes, the bacteria often associated with clogged pores. CBD may help manage oil, while CBG may support the skin by addressing bacterial load.

Moisture and Barrier Integrity

For those experiencing chronic dryness or atopic dermatitis, CBG may provide support for barrier health. It acts as a humectant, assisting in pulling moisture into the skin while potentially influencing genes responsible for lipid barrier expression. Evidence suggests that CBG may help reduce Transepidermal Water Loss (TEWL), which is often a factor in compromised skin.

CBD remains relevant for symptom management. If eczema is accompanied by persistent itching, CBD may assist by interacting with TRPV1 receptors—the "hot and itchy" receptors—to help desensitize nerve endings and provide comfort.

Managing Psoriasis: The Hyper-Proliferation Problem

Psoriasis involves the rapid turnover of skin cells, leading to plaque buildup. CBG may support the regulation of keratinocyte proliferation, helping to normalize the growth cycle. Combining this with CBD—which may reduce the recruitment of inflammatory cytokines to the area—offers a strategy for supporting skin balance.

The Role of Terpenes

A cannabinoid's effectiveness is influenced by its ability to penetrate the stratum corneum. Terpenes assist in this process:

• Bisabolol: This sesquiterpene alcohol acts as a penetration enhancer, modifying skin structure to help cannabinoids reach deeper dermal layers.
• Humulene: Known for its potential to reduce swelling, Humulene is often used for cystic acne or inflamed, swollen plaques.

Formulation Logistics: What to Look For

When selecting topicals, prioritize the Certificate of Analysis (COA) over marketing claims.

1. Check the Concentration: For therapeutic, chronic-condition use, ensure the topical provides at least 10mg/ml of the active cannabinoid.
2. Verify the COA: In "Full Spectrum" products, CBG is often present in trace amounts. Ensure your COA reflects a meaningful percentage of CBG if that is your primary goal.
3. Carrier Quality: Seek ingredients like Jojoba, Squalane, or MCT oil. Avoid products with denatured alcohol or heavy synthetic fragrances, as these are potential irritants that may compromise the skin barrier.

The Skin-Gut Connection

Topicals do not function in a vacuum. Oral CBD may help stabilize systemic cortisol levels, which can influence stress-induced sebum spikes. Oral CBG may support the digestive tract, potentially reducing systemic inflammation that sometimes manifests as rosacea or psoriasis flares.

If you are starting a new routine, always perform a 24-hour patch test on your forearm. Most adverse reactions stem from secondary ingredients like Propylene Glycol rather than the cannabinoids themselves. Pay attention to your skin’s response—it remains the most accurate indicator of success.

Legal Disclaimer: This content is for educational and informational purposes only and does not constitute medical advice. Always seek the advice of a physician regarding a medical condition. Efficacy has not been confirmed by FDA-approved research. Check your local laws regarding cannabis and terpene use.

Sources

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2. Palmieri B, Laurino C, Vadalà M. (2019). A therapeutic effect of cbd-enriched ointment in inflammatory skin diseases and cutaneous scars. Clin Ter. 170(2):e93-e99. PubMed

3. Appendino G, Gibbons S, Giana A, et al. (2008). Antibacterial cannabinoids from Cannabis sativa: a structure-activity study. J Nat Prod. 71(8):1427-30. PubMed

4. Tóth KF, Ádám D, Bíró T, Oláh A. (2019). Cannabinoid signaling in the skin: therapeutic potential of the "C(ut)annabinoid" system. Molecules. 24(5):918. PubMed