Q: This is my current skincare routine with one is vitamin C with vitamin E and ferulic acid. Pic 2 is 5% niacinamide with some other compounds. And pic 3 is salicylic acid 2% with other compounds. I recently heard a podcast on a science versus in Spotify where the topic is skincare products and the evidence. And they say that the vitamin C is water soluble, so even until now there has not been any way to make vitamin C penetrate the epidermis to cause any meaningful effect on the skin. So this product, minimalist, will it penetrate the epidermis and cause any meaningful effect, or am I wasting my money? Same goes for niacinamide and salicylic acid. Just examine all the research for these topicals, whether they are beneficial when applied topically. What does the evidence say? Or are the podcasters lying A: I now have enough solid evidence to give you a thorough, well-sourced answer. Let me put it all together. --- Are Your Minimalist Products Worth It? What the Evidence Actually Says First: The Podcast Claim Was Half-Right and Half-Wrong The podcast hosts were describing pure L-ascorbic acid LAA - the raw, unstable form of vitamin C. Their point has merit for that specific molecule: LAA is water-soluble, highly unstable oxidizes rapidly on air exposure, and requires a very low pH below 3.5 to penetrate skin effectively, which is often irritating. Many cheap serums using LAA do degrade before they reach meaningful skin layers. But here's the thing: your Minimalist serum Pic 1 does not contain L-ascorbic acid. It contains 3-O-Ethyl Ascorbic Acid 3-O-EAA - a structurally different derivative engineered specifically to overcome those problems. The podcast claim does not apply to what you're using. --- Product 1: Vitamin C Serum 3-O-Ethyl Ascorbic Acid + Ferulic Acid + Tocopheryl Acetate + Fullerenes The penetration question - answered by direct research: A 2019 study by Iliopoulos et al. PMID 31517290https://pubmed.ncbi.nlm.nih.gov/31517290/ conducted the first comprehensive characterization of 3-O-EAA and tested it in full-thickness porcine skin the gold standard ex vivo model using Franz diffusion cells. They confirmed skin penetration was evident with multiple vehicles - including 1,2-hexanediol, propylene glycol, glycerin, and IPA. Your Minimalist formula contains 1,2-hexanediol and Dimethyl Isosorbide both listed in the ingredients, which are exactly the types of vehicles shown to drive this molecule into skin. Key properties that make 3-O-EAA better than plain vitamin C: - logP = -1.07 meaning it's both water AND slightly lipid-compatible - more amphiphilic than pure LAA - Stable at wider pH range 4-5.5, so it doesn't degrade in the bottle - More lipophilic than LAA - a multidisciplinary consensus reviewhttp://www.surgicalcosmetic.org.br/details/1091/en-US/multidisciplinary-consensus-on-the-benefits-of-topical-vitamin-c explicitly notes 3-O-EAA is "more easily absorbed by the skin than other water-soluble AA derivatives" - After penetration, it's converted to L-ascorbic acid inside the skin by sodium-dependent proteins SVCT1/SVCT2 transporters present in keratinocytes What it does once in skin evidence summary: A 2023 systematic review Correia & Magina, PMID 37128827https://pubmed.ncbi.nlm.nih.gov/37128827/ analyzed 7 RCTs on topical vitamin C and found: skin appeared smoother and less wrinkled confirmed by biopsies, significant lightening on pigmentation assessments, and depigmenting properties - though long-term use is needed. A 2021 study specifically on 3-O-EAA at 30% in a reconstructed human pigmented epidermis model showed a 15.52% reduction in melanin content after just 4 days of treatment. About the ferulic acid and Vit E tocopheryl acetate: This combination is well-established in dermatology. Ferulic acid + Vitamin E doubles the photoprotective efficacy of topical vitamin C and improves its stability. This is not marketing - it's based on work by Lin et al. J Invest Dermatol, 2005 that is cited in every serious dermatology curriculum. The Fullerenes also in this formula: These are carbon nanomolecules with potent antioxidant activity - they can neutralize up to 20 times more free radicals than vitamin C alone. Early evidence is promising but fewer clinical trials exist. Verdict on Pic 1: The podcast hosts are describing a different molecule. Your 3-O-EAA derivative has demonstrated skin penetration in research conditions, and vitamin C topicals as a class have systematic review-level evidence for improving photoaging and hyperpigmentation. The formula design ferulic acid, Vit E synergy, penetration-enhancing vehicles is scientifically sound. Not a waste of money - but set realistic expectations: you need weeks to months of consistent use. --- Product 2: Niacinamide 5% + Bifida Ferment Lysate, Oat Extract, Sodium Hyaluronate This is actually the strongest-evidenced product of your three. Niacinamide vitamin B3 is water-soluble and penetrates skin effectively - there is no controversy here like with vitamin C. It enters keratinocytes readily, and being a small, neutral molecule, it doesn't face the same pH-dependent transport barriers as ascorbic acid. What the evidence shows for topical niacinamide: The Cochrane systematic review PMID 33034949https://pubmed.ncbi.nlm.nih.gov/33034949/ included nicotinamide in its analysis of topical acne treatments across 49 RCTs with 3880 participants. A 2024 split-face double-blind RCT PMID 38299457https://pubmed.ncbi.nlm.nih.gov/38299457/ found niacinamide-ceramide moisturizer outperformed standard hydrophilic cream as an adjunct for mild-to-moderate acne. A 2024 multicenter RCT PMID 38618759https://pubmed.ncbi.nlm.nih.gov/38618759/ showed niacinamide combined with salicylic acid reduced chloasma a form of facial hyperpigmentation. The mechanisms are well understood not hypothetical: - Inhibits melanosome transfer from melanocytes to keratinocytes - this directly reduces dark spots and uneven tone without irritation - Upregulates ceramide, sphingolipid, and fatty acid synthesis in keratinocytes - measurably improves skin barrier function confirmed in multiple in vitro and clinical studies - Reduces sebum production - relevant if you have oily skin or acne-prone skin - Anti-inflammatory via NF-kB and MAPK pathway modulation - suppresses P. acnes-induced IL-8 - NAD+ precursor - supports DNA repair and cellular energy in skin cells verified mechanistically Your formula's bonus ingredients: - Bifida Ferment Lysate - a probiotic ferment from Bifidobacterium longum, shown in clinical studies including Estee Lauder/L'Oreal funded but also independent to reduce skin sensitivity and strengthen barrier response - Sodium Hyaluronate - small molecular weight HA, penetrates to upper dermis, demonstrated humectant effect in multiple clinical studies - Oat kernel extract Avena Sativa - anti-inflammatory, clinically validated for barrier-sensitive and atopic-prone skin Verdict on Pic 2: Excellent evidence base. Niacinamide at 5% is one of the most evidence-backed cosmeceutical ingredients available. This is genuinely a well-formulated product with research support. --- Product 3: Salicylic Acid 2% + Marrubium Vulgare Extract, Sodium Hyaluronate, Oligopeptides Salicylic acid BHA is the most evidence-backed of all three. Salicylic acid is lipid-soluble beta-hydroxy acid, which means it can dissolve into sebum and penetrate into hair follicles and pores - this is precisely why it is so effective for acne and congestion. The penetration question is not debated here. The 2024 JAAD Practice Guideline PMID 38300170https://pubmed.ncbi.nlm.nih.gov/38300170/ - the American Academy of Dermatology's acne management guidelines - gave salicylic acid a conditional recommendation for acne vulgaris based on systematic review evidence. This is a regulatory-grade clinical guideline, not a skincare brand's marketing claim. The Cochrane systematic review found salicylic acid equivalent to tretinoin in patient global assessment of acne improvement RR = 1.00, 95% CI 0.92-1.09 - that is notable because tretinoin is a prescription retinoid, and salicylic acid matched it in clinical outcomes across multiple RCTs. What salicylic acid does at 2%: - Exfoliates inside pores comedolytic - breaks down intercellular adhesions in the stratum corneum - Anti-inflammatory - inhibits prostaglandin synthesis a direct salicylate mechanism - Antibacterial - helps reduce P. acnes colonization - Reduces blackheads/whiteheads at this concentration without significant irritation Your formula's bonus ingredients: - Marrubium Vulgare White Horehound Extract - shown in recent cosmetic research to have anti-aging and anti-inflammatory effects; some evidence for soothing acne-prone skin - Oligopeptides - small peptides that may signal collagen synthesis Matrixyl-type mechanism; evidence is moderate - Sodium Hyaluronate - helps counteract the potential dryness from SA exfoliation Verdict on Pic 3: Salicylic acid 2% is one of the few OTC topical actives with guideline-level evidence. This product has a strong scientific basis. The instruction to "always use sunscreen during the day" on the label is correct - SA increases photosensitivity. --- Summary Table Product Key Active Evidence Quality Penetration Verdict --------------- Vitamin C serum 3-O-Ethyl Ascorbic Acid Moderate systematic review for Vit C class; limited direct RCTs for this derivative Confirmed in ex vivo research Worth using; set realistic expectations Niacinamide 5% Niacinamide Strong multiple RCTs, Cochrane review, mechanistic consensus Not in question - penetrates well Strong evidence; keep using Salicylic acid 2% Salicylic acid Strongest AAD guidelines, Cochrane, matches tretinoin in RCTs Lipid-soluble - penetrates pores Excellent evidence; keep using --- The Honest Bottom Line The podcasters are partially right about pure L-ascorbic acid being tricky to deliver. But they appear to have oversimplified this into a blanket claim that "Vitamin C doesn't penetrate," which is misleading when applied to modern derivatives. For niacinamide and salicylic acid, the claim would be straightforwardly wrong - both have robust evidence of skin penetration and clinical efficacy. You are not wasting your money on these three products. Minimalist Be Minimalist is actually one of the more science-honest brands in the Indian market, and the formulations you have are consistent with what dermatology research supports. The main caveat across all three: consistency over weeks and months is what drives results, not any single application.
