Soy: A Nutritional Powerhouse for Your Health
Soy is one of the only plants on earth that delivers all nine essential amino acids in a single, whole-food source — making every cup of Three Trees Soymilk a complete act of nourishment.
Soy milk has nourished East Asian communities for more than two thousand years. The earliest recorded mentions date to first-century China, where farmers soaked, ground, filtered, and boiled soybeans into a drink called Doujiang — a ritual of daily nourishment that persists across Taiwan, Japan, Korea, and beyond. For our founder Jenny, growing up with Taiwanese heritage meant soy was never a trend or a substitute. It was simply food: whole, satisfying, and deeply nutritious.
That conviction is why Three Trees brought soy into the refrigerated plant-based milk category in the U.S. — not as a commodity, but as a celebration of what the soybean genuinely delivers. And what it delivers, nutritionally, is remarkable.
High Protein Content
One cup of Three Trees Unsweetened Soymilk delivers 12 grams of complete protein, made from whole organic soybeans with nothing stripped away. That richness comes from starting with more of the real ingredient and letting the soybean do what it has always done: nourish.
What makes soy's protein genuinely exceptional is its quality score. Scientists measure protein quality using the Protein Digestibility Corrected Amino Acid Score (PDCAAS), a scale from 0 to 1.0 where 1.0 represents the highest possible rating. Soy protein achieves a PDCAAS of 1.0, placing it alongside eggs and whey. No other plant protein achieves this score on its own.
That completeness matters because soy provides all nine essential amino acids your body cannot produce itself, including the branched-chain amino acids leucine, isoleucine, and valine that support muscle recovery. Whether it goes into your morning matcha, a post-workout smoothie, or overnight oats, every cup is a whole act of nourishment.
Soy is one of the only plants on earth that delivers all nine essential amino acids in a single, whole-food source — making every cup of Three Trees Soymilk a complete act of nourishment
Heart-Healthy
The soybean's fat profile is one of its quieter strengths. Soy's naturally low saturated fat content, combined with meaningful amounts of unsaturated fatty acids and alpha-linolenic acid (an essential omega-3), supports cardiovascular health as part of a balanced diet.
The U.S. Food and Drug Administration has recognized this relationship: consuming 25 grams of soy protein per day, as part of a diet low in saturated fat and cholesterol, may reduce the risk of heart disease. Three Trees Soymilk fits naturally into that kind of daily ritual, whether it is the base of your morning smoothie or the creamy pour in your afternoon latte.
Beyond fat profile, soy's potassium content supports healthy blood pressure, and its naturally low sodium levels make it a clean, heart-forward choice from the first sip to the last.
Rich in Isoflavones
Isoflavones are polyphenolic antioxidants found almost exclusively in soybeans and soy foods. The primary isoflavones in soy, genistein and daidzein, have been studied extensively for their antioxidant activity and their potential role in long-term wellness.
A comprehensive review published in Advances in Nutrition found that soy isoflavones do not exhibit estrogenic effects in postmenopausal women across four measures of estrogenicity, providing a strong scientific basis for understanding isoflavones on their own terms rather than through the lens of hormonal comparison. What the research does show is meaningful antioxidant activity and cardiovascular support.
Whole soybeans retain their full isoflavone content, which is one reason Three Trees starts with the whole bean rather than processed soy protein isolate. When you pour a glass of Three Trees Soymilk, you are getting the complete nutritional matrix the soybean naturally offers, not a fraction of it.
Low Glycemic Index
Soy milk has a glycemic index (GI) ranging from 18 to 44, placing it firmly in the low-GI category. A low GI means the carbohydrates in soy milk are digested and absorbed gradually, supporting steady energy rather than sharp blood sugar spikes.
This makes Three Trees Unsweetened Soymilk a natural fit for the kinds of rituals our community loves most: overnight oats that sustain you through a long morning, a matcha latte that keeps your focus clear, or a smoothie that carries you from one part of the day to the next without the crash. The soybean's naturally low glycemic load is not an engineered feature. It is simply what the bean is.
For those managing blood sugar or seeking sustained energy throughout the day, soy milk's low GI is one of the most practical nutritional qualities it offers, and one of the reasons Jenny has always kept it at the center of her daily nourishment.
42g Protein per Bottle | Unsweetened
$7.99 / bottle (3 pack) or $7.59 / bottle (6 pack)
Soy milk just got an upgrade. Our brand new soy milk is a fresh take on the classic plant based milk product - but this time organic, clean and packed with 42 grams of protein per bottle.
That’s 50% MORE protein than dairy milk. Tastes amazing by itself, and pumps up your protein content in every recipe.