Who Should Not Drink Soy Milk?

1. People with Stomach or Digestive Disorders

Soy milk has a cooling property, which may not be suitable for people with weak digestive systems. Those suffering from stomach aches, bloating, or ulcers may experience increased acid secretion in the stomach, worsening their condition when consuming too much soy milk.

Additionally, those with indigestion or diarrhea should temporarily avoid soy milk. Consider switching to other types of milk like fresh milk or fruit-based milk until symptoms improve.

2. People with Gout

In addition to nutrients, soy milk contains purines, which can worsen gout if accumulated in the body. Overconsumption may lead to flare-ups. Soy milk is not recommended during gout treatment—opt for a more tailored and balanced diet instead.

3. People Taking Antibiotics

Certain antibiotics contain erythromycin, which may chemically react with soy milk and reduce the drug's effectiveness. It's advised not to drink soy milk immediately after taking antibiotics; instead, wait at least one hour.

4. Breast Cancer Patients

Although phytoestrogens in soy have benefits for women, they may pose risks for breast cancer patients—especially those undergoing treatment. Soy milk may stimulate cancer cell growth and hinder recovery. Thus, it is not recommended for these patients.

5. People with Kidney Stones

Soy milk contains oxalates, which can bind with calcium in the blood and form kidney stones. Continued consumption may cause stones to grow larger, increasing risks of complications such as urinary infections or kidney inflammation.

6. People with Zinc Deficiency

Soy milk contains saponins and lectins, which can inhibit zinc absorption. People deficient in zinc should limit soy milk intake. If you still want to consume it, boil the milk thoroughly to neutralize these compounds.

7. People Recovering from Surgery

Post-surgery, the body is often weak, with a compromised immune system and digestive function. Drinking soy milk during this time may interfere with recovery. Avoid soy milk until the body has regained strength.

8. Pregnant and Breastfeeding Women

Pregnant and breastfeeding women should only consume soy milk in moderation when necessary. Overconsumption may negatively affect fetal development.

Benefits of Soy Milk

1. Health Benefits

• Rich in nutrients: Contains essential vitamins like A, B1, B2, D, PP, K, F, and beneficial enzymes that aid metabolism and energy production.

• Reduces prostate cancer risk: High testosterone levels can lead to prostate cancer. Soy milk's phytoestrogens help suppress testosterone production.

• Strengthens blood vessels: Omega-3, omega-6, and antioxidants in soy milk protect blood vessels from damage by free radicals.

• Prevents and manages diabetes: Fiber content slows sugar absorption, helping stabilize blood sugar.

• Prevents osteoporosis: Phytoestrogens and calcium in soy milk help prevent bone loss, especially in the elderly.

• Supports menopause health: Helps regulate estrogen levels, easing menopause symptoms.

• Improves mental health: Nutrients like magnesium and B vitamins may reduce the risk of depression.

• Boosts immunity: High-quality plant protein in soy milk enhances immune function.

• Restores energy: Proteins and enzymes in soy milk support cellular energy recovery post-workout or strenuous activity.

2. Beauty Benefits

• Anti-aging: Antioxidants and healthy fatty acids help slow skin aging.

• Weight loss: Low sugar and unsaturated fats make soy milk effective for feeling full and managing weight.

• Brightens skin: Can be used topically by applying soy milk to the face for 10–15 minutes before rinsing.

Foods You Shouldn’t Mix with Soy Milk

1. Eggs

Mixing eggs with soy milk is a common mistake. Trypsin inhibitors in soy milk can interact with egg whites, creating compounds that hinder protein absorption.

2. Brown Sugar

Brown sugar contains organic acids like lactic and acetic acid, which can interact with proteins and calcium in soy milk, reducing nutritional value and hindering digestion.

Important Notes When Drinking Soy Milk

• Avoid drinking on an empty stomach: It may be better absorbed when paired with carbs like bread or biscuits.

• Avoid citrus fruits like oranges or tangerines right before or after drinking soy milk, as their acids may react with the milk’s protein and cause indigestion.

• Don’t overconsume: Limit to one glass (around 300ml) per day.

• Don’t drink raw soy milk: Always boil thoroughly to eliminate harmful substances.

• Don’t store in thermos bottles: Warm temperatures promote bacterial growth and spoilage after 3–4 hours.

Frequently Asked Questions About Soy Milk

1. When is the best time to drink soy milk?

According to Japanese nutritionist Kanzaki Tomoko:

• Morning: After waking up, with breakfast, to aid digestion and metabolism.

• Evening: 1–2 hours before bedtime to enhance isoflavone absorption, aiding weight control.

2. Is it safe to drink soy milk regularly?

Yes—when consumed in moderation (300–500ml/day for children, under 300ml/day for adults). High doses may cause digestive issues or contribute to excess sugar intake from added sweeteners.

3. Can men drink soy milk?

Yes, in moderation. Excessive intake may affect testosterone levels due to isoflavones acting like estrogen. Risks include:

• Hormonal imbalance

• Digestive issues (bloating, constipation)

• Reduced mineral absorption (e.g., iron deficiency)

• Thyroid disorders (due to reduced iodine levels)