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ONE/SIZE

B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow | 30ml

4.8Store rating · 450+ Google reviews
Makeup type: Base & PrimerSee all
₹5,999 MRP ₹7,50020% Off Inclusive of all taxes
Dispatched in 24–48 hrs · Free delivery on this item

Sold by: Secret Beauty, Kharghar · Fresh stock from our store

100% Authentic Easy return policy

Available Offers & Club Benefits

Free deliveryOn orders of ₹899 or more. Below that, delivery is a flat ₹80.Unlocked with this item
Cash on DeliveryPay in cash when your order arrives.
Free delivery
above ₹899
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Foundation too heavy, too cakey or too full-coverage for every day? ONE/SIZE B12 Base Thinner is a serum mixing medium that transforms the coverage of any liquid foundation or cream formula and adds a boost of radiance – a vitamin pearl serum with Vitamin B12 for a healthy, luminous finish. Customise your coverage – turn any full-coverage base into a skin tint Boost of Vitamin B12 – antioxidant protection Beta Glucan + Hyaluronic Acid – plumping hydration Vegan crushed pearls – skin-smoothing radiance 30 ml | Non-comedogenic | Dermatologist tested | Made in USA | ONE/SIZE by Patrick Starrr 100% authentic, shipped from our Secret Beauty store in Kharghar, Navi Mumbai. Free delivery on orders above ₹899.

Frequently Bought Together

Extra 5% off when you buy them together

Total ₹12,006 ₹12,638

You save ₹632 by buying together

Highlights

Size
30 ml
Finish
Luminous
Key Ingredients
Vitamin B12, Beta Glucan, Hyaluronic Acid, Vegan Pearls
Formulation
Serum Mixing Medium
Country of Origin
USA

Product Details

Why it’s a must-have

ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow

Full-coverage foundation is perfect for bridal and party looks – but too heavy, cakey or mask-like for everyday wear. Instead of buying a whole new base, ONE/SIZE B12 Base Thinner lets you customise the one you already love. This serum mixing medium transforms the coverage of any liquid foundation or cream formula and adds a boost of radiance.

It's a vitamin pearl serum with a shot of vitamin B12 for a healthy, luminous finish derived from vegan crushed pearls, plus beta glucan and hyaluronic acid for plumping hydration – so your makeup looks lighter, fresher and more like real skin.

Sound Familiar?

  • Your foundation feels too heavy and cakey for daily wear.
  • Full-coverage base looks dull and mask-like.
  • Your skin looks dry under foundation.
  • You want a skin-tint look without buying a new foundation.

Here's How It Fixes That

Mix it with any liquid foundation or cream formula to sheer it out to your perfect coverage.

Vegan crushed pearls (mica) add skin-smoothing radiance and a luminous finish.

Vitamin B12 gives antioxidant protection, while beta glucan, hyaluronic acid and ceramide NP add plumping hydration.

Why You'll Love It

  • Custom coverage – from full to skin-tint
  • Instant glow – vegan crushed pearls
  • Plumping hydration – beta glucan + hyaluronic acid
  • Skincare benefits – vitamin B12, ceramide, adenosine
  • Clinically tested – radiance, moisture and lines improved

What's Inside – and What It Does for You

  • Cyanocobalamin (Vitamin B12) – antioxidant protection
  • Beta glucan & sodium hyaluronate – plumping hydration
  • Mica (vegan crushed pearls) – skin-smoothing radiance
  • Ceramide NP – supports the skin barrier
  • Goji (Lycium barbarum) fruit extract & ethyl ascorbic acid – radiance-boosting care
  • Adenosine – helps smooth the look of lines

Who It's For

Makeup lovers who want lighter, glowier everyday makeup; makeup artists and makeup students customising coverage for clients; anyone with dry skin whose foundation looks cakey. Normal, dry and combination skin.

Full Ingredients

Water (Aqua/Eau), Dipropylene Glycol, Dimethicone, Glycerin, Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate, Diglycerin, Mica, Cyanocobalamin, Beta-Glucan, Sodium Hyaluronate, Ceramide NP, Lycium Barbarum Fruit Extract, Adenosine, 3-O-Ethyl Ascorbic Acid, Tocopherol, Cetearyl Olivate, Hydrolyzed Jojoba Esters, Caprylic/Capric Triglyceride, Sodium Phytate, Hydrogenated Lecithin, Polysorbate 60, Caprylyl Glycol, Sorbitan Oleate, Tromethamine, Butylene Glycol, Tin Oxide, Potassium Sorbate, Sorbic Acid, Acrylates Copolymer, Phenoxyethanol, Titanium Dioxide (CI 77891).

Safety Note

For external use only. Avoid contact with eyes. Discontinue use if irritation occurs.

How to use & match

  1. Pump your foundation onto the back of your hand or a palette.
  2. Add the desired amount of B12 Base Thinner – more for sheerer coverage.
  3. Mix well and apply with a brush, sponge or fingers.
  4. Also mix with cream formulas like cream blush or bronzer for a softer, dewy effect.

Secret Beauty Pro Tip: Mix 1 part Base Thinner with 1 part full-coverage foundation for the perfect everyday skin-tint glow – ideal for office and college looks.

Authenticity & delivery

Authentic and brand-sourced. Every product is bought from the brand or its authorised distributors. Dispatched within 24–48 hours from our store in Sector 10, Kharghar, Navi Mumbai, with tracking.

Questions about this product

What is ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow?

ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow is a base & primer product from ONE/SIZE. Foundation too heavy, too cakey or too full-coverage for every day?

Is ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow safe for sensitive skin?

It isn’t specifically labelled for sensitive skin. Everyone’s skin reacts differently, so read the full ingredient list on the pack, patch test on your inner arm for 24 hours before first use, and stop if you feel irritation. Our team at the Kharghar store can help you choose gentler options.

How can I verify that ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow is authentic?

Secret Beauty sells only authentic products from ONE/SIZE, bought from the brand, its authorised distributors or verified sellers. When it arrives, check that the seal is intact, that the batch number and manufacturing / expiry dates are printed on the pack, and that the MRP label shows the manufacturer’s or importer’s name and address (required on cosmetics sold in India). You can also see the product at our store: Shop No 4–8, Plot No 255, Swaraj Imperial, Sector 10, Kharghar, Panvel, Maharashtra 410210.

What is the price of ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow in India?

ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow costs ₹5,999 (MRP ₹7,500, 20% off) at Secret Beauty, inclusive of all taxes. It is in stock. Delivery is free on orders of ₹899 or more.

How fast is delivery?

Orders are packed and shipped within 24–48 hours and usually arrive in 3–6 working days in metro cities (5–10 elsewhere) across India, with a tracking link. Delivery is free on orders of ₹899 or more; below that it costs ₹80.

Can I return ONE/SIZE B12 Base Thinner 30ml – Vitamin Pearl Serum to Sheer Out Foundation & Add Glow?

Yes, if it is unused and still sealed: returns are accepted within 7 days of delivery. Opened cosmetics can’t be returned for hygiene reasons. If it arrives damaged, wrong or expired, tell us within 48 hours with photos. Start from My account → Returns & refunds.

Is Cash on Delivery available?

Yes, on eligible orders and PIN codes. You can also pay by UPI, credit or debit card, net banking or wallets through Razorpay, with your Secret Beauty wallet, or with a gift card.

Another question? Visit the Help centre or ask us.

Ratings & Reviews

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What shoppers say about Secret Beauty

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Free Delivery

On orders above ₹899

Easy Returns

Hassle-free return policy

100% Authentic

Products sourced carefully

Secure Packing

Packed and shipped in 24–48 hours