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- BUILD LEAN MUSCLE: As featured in Los Angeles Confidential Magazine. If you're looking for the best, you've found it! Vintage Build is the essential 3-in-1 natural muscle builder. Its unique formula delivers a proven trio of muscle-building ingredients in a flavored powder that mixes easily and tastes great with water or your favorite drinks.
- TESTED AND TRUSTED: Third-party tested supplement made exclusively with premium ingredients, including branched chain amino acids (BCAAs), creatine monohydrate, and L-glutamine. Suitable for men and women looking for lean muscle growth, not bulk.
- GUARANTEED RESULTS OR YOUR MONEY BACK: Old School Labs products never compromise on quality and always include clear and complete supplement facts without any "proprietary blends." We stand by our products 100%. If you are not completely satisfied with any OSL product, we will help you resolve your concern or provide a full refund.
- OSL HERITAGE: Old School Labs of California - Supplements That Make Sense, 40 Years in the Making. Only one thing has ever mattered to OSL of California: our customers. Before becoming a best-selling national brand with thousands of loyal customers and followers on social media, this was our priority and this will never change. Our team of experts is always available via email or on social media to answer your questions regarding the best way to use a product or reach your goals! Our products are sold on Amazon.com, proudly formulated in California & made in the U.S.A.