Here's an example of a Glycerol product:
http://www23.netrition.com/pbl_liquid_muscle_page.html
Liquid Muscle
Liquid Muscle is the first glycerol superhydration system to hit the market. This amazing product contains 50ml. Of glycerine and 20 grams of protein in just four tablespoons.
In scientific studies, glycerol was shown to improve the body’s ability to absorb and hold onto large amounts of intramuscular water. This translates into incredible pump and noticeable increases in vascularity.
Liquid Muscle is available in a great tasting chocolate flavor.
Calories: 39 Total Fat: 0 Protein: 10 g (2 tablespoons) Carbohydrates (excluding glycerol): 0 Sugars: 0
Ingredients: Bioreacted Beef Protein, Complete Amino Acid Profile, Glycerol
For High Powered Workouts: It is recommended that you take four to five tablespoons of Liquid Muscle an hour and a half to two hours prior to training. This dosage may be taken in a protein drink or with at least 12 ounces of water. Do not consume any glycerol product without water. You may also add four to five tablespoons of Liquid Muscle to your water bottle in the gym.
For Increased Vascularity Pre-Contest: Take approximately five tablespoons of Liquid Muscle with 12 ounces of water 13 hours prior to prejudging. Take another five tablespoons upon waking on contest day with eight ounces of water. Take another four tablespoons between prejudging and the night show with 12 ounces of water.
Liquid Muscle can be added to any supplement regime you choose. Users report a better pump of glycerol than with creatine, but it is safe to consume creatine while using this product.
When attempting to add muscle to your physique it is extremely important to be in positive nitrogen balance at all times. Therefore, 20 grams of protein was added to this formula to help facilitate this goal. This formula contains the highest concentration of protein of any product on the market. A whopping 20 grams of protein in just four tablespoons! In addition, Liquid Muscle contains no sugar. This is hard to believe when you taste how sweet this product is. That is because glycerol is an extremely sweet tasting substance. You will be surprised when you try this delicious chocolate flavored product.