The new year is a great time to establish healthy habits. While a balanced diet and exercise are important, for busy modern lifestyles, it's effective to fill nutritional gaps with natural supplements. In this post, we'll introduce seven science-backed natural supplements that support hormone health, blood sugar control, protein absorption, and antioxidant function. Start your healthy new year by learning the specific benefits and proper usage of each ingredient.

1. Inositol

Inositol is a pseudovitamin belonging to the B vitamin family and plays an especially important role in blood sugar regulation and hormone balance. It serves an essential function in the insulin signaling pathway and is widely used clinically to improve polycystic ovary syndrome (PCOS) symptoms.

According to a meta-analysis conducted in 2019, daily inositol intake of 2-4g reduced insulin resistance in PCOS patients by an average of 30-40%. It is also effective in improving fasting blood glucose levels and normalizing hormone profiles. Inositol comes in two forms (myo-inositol and D-chiro-inositol), and shows the highest effectiveness when taken together in a 40:1 ratio.

  • Recommended dosage: 2-4g per day (divided doses)
  • Time to see results: 8-12 weeks
  • Side effects: Some users report digestive discomfort

While inositol is naturally found in eggs, cereal germs, and citrus fruits, it's difficult to meet the required dose through food alone, so supplement form is recommended.

2. Collagen

Collagen accounts for approximately 30% of all protein in the human body and is an essential component supporting skin, bone, connective tissue, and gut health. Supplementing collagen, which decreases by 1-2% annually starting in the mid-20s, can improve both anti-aging and structural health.

Hydrolyzed collagen peptides (HCP) in peptide form have high bioavailability, making digestion and absorption easy. In a 2019 clinical trial, the group that consumed 10g of collagen peptides for 12 weeks showed 7% improvement in skin elasticity and a 20% reduction in wrinkle depth. Simultaneously, bone density markers also improved, confirming the effect of supporting bone health.

Collagen characteristics by type: Type 1 collagen (skin, tendons), Type 2 collagen (cartilage), and Type 3 collagen (skin elasticity) exist, with mixed supplements providing comprehensive benefits.

  • Recommended dosage: 10-15g per day
  • Usage tip: Taking with vitamin C promotes collagen synthesis
  • Selection criteria: Peptide form derived from beef or fish recommended

Collagen supplements help relieve "leaky gut" syndrome, known for improving gut health, and also contribute to reducing joint pain and enhancing exercise recovery.

3. Vitamin B1 (Thiamine)

Vitamin B1 is a key coenzyme in carbohydrate metabolism, supporting energy production, nervous system function, and heart health. Modern people who consume large amounts of refined carbohydrates and caffeine are at high risk of B1 deficiency.

B1 deficiency can manifest as fatigue, reduced concentration, and nerve damage symptoms. Especially for those under chronic stress and those who exercise regularly, B1 excretion increases, making supplementation important. Research shows that daily B1 supplementation of 50-100mg improves energy levels and reduces neuroinflammation. Since B1 is a water-soluble vitamin, it doesn't accumulate in the body even with excessive intake, making it safe.

  • Daily recommended amount: Adult men 1.2mg, women 1.1mg
  • Supplement dosage: 50-100mg (typical supplement range)
  • Food sources: Pork, sunflower seeds, whole grains, mushrooms

B1 is closely related to brain health, helping prevent cognitive decline and reduce the risk of neurodegenerative diseases.

4. Vitamin B6 (Pyridoxine)

Vitamin B6 plays a central role in neurotransmitter synthesis, homocysteine metabolism, and immune function regulation. It is particularly essential for serotonin, dopamine, and GABA production, directly affecting mood and mental health.

In research on relieving premenstrual syndrome (PMS) in women, daily B6 supplementation of 100mg reduced mood changes, anxiety, and fatigue by 25-35% respectively. B6 deficiency manifests as fatigue, neuroinflammation, and skin problems, and is frequently observed especially in menopausal women with significant hormone fluctuations and those taking antidepressants. It also supports cardiovascular health through reduced blood homocysteine levels.

Active form of B6: P-5-P (pyridoxal 5-phosphate) has 2 times higher bioavailability than pyridoxine, so check for P-5-P containing products when selecting supplements.

  • Daily recommended amount: Adults 1.3-1.7mg
  • Clinical dosage: 50-100mg (for PMS relief purposes)
  • Caution: Long-term use above 100mg may cause neurological side effects (medical consultation required)

B6 is related to skin health, helping improve acne and reduce skin inflammation.

5. Vitamin D

Vitamin D is a fat-soluble vitamin that functions as a hormone, playing a key role in calcium absorption, immune function, bone health, and mood regulation. Approximately 60-70% of Koreans are deficient in vitamin D, which is affected by season, geographic location, skin tone, and sunscreen use.

According to a large-scale clinical meta-analysis in 2021, when blood vitamin D levels are below 30ng/mL, the risk of infectious disease increases 2-fold and fracture risk increases 1.5-fold. For people with less than 2-3 hours of sun exposure per week, supplement intake is essential. Vitamin D3 (cholecalciferol) has 87% higher bioavailability than D2 (ergocalciferol), so D3 is recommended when choosing supplements.

  • Optimal blood level: 30-100 ng/mL
  • Deficiency signs: Persistent fatigue, muscle pain, osteoporosis, frequent colds
  • Recommended supplementation: 1000-4000 IU per day (personalized medical recommendation)

Vitamin D has also been proven to reduce the risk of depression, anxiety, and seasonal affective disorder. It's important to determine appropriate supplementation for each individual through regular blood tests.

6. Multivitamin

A multivitamin is a practical choice for supplementing essential micronutrients in the daily recommended amounts all at once. However, not all multivitamins provide equivalent benefits, so when selecting a product, carefully check bioavailability, additives, and content.

High-quality multivitamins contain naturally derived or active forms of vitamins rather than synthetic forms. For example, folate as methylfolate, B12 as methylcobalamin, and B6 as P-5-P form are superior. In a 2020 study, those taking high-quality multivitamins had 23% lower infectious disease prevalence compared to the placebo group, and fatigue also improved significantly.

Multivitamin selection tips: Check whether the product contains iron. Postmenopausal women and men are at risk of excess iron intake, so choosing iron-free products is safer.

  • Time to take: Take with meals containing fat for fat-soluble vitamin absorption
  • Things to check: If you experience metallic taste or nausea, component intolerance is possible (discontinue and consult medical professional)
  • Quality certification: Products with USP, NSF, or ConsumerLab certification recommended

Since multivitamins serve as the foundation of supplementation, taking them together with additional supplements tailored to individual health goals can provide synergistic effects.

Summary

For a healthy new year, a comprehensive nutrition strategy based on scientific evidence is needed rather than fragmentary health information. The seven natural supplements introduced in this post each support specific health goals such as hormone health, blood sugar control, protein metabolism, and antioxidant function.

Key points:

  • Inositol: 2-4g per day for blood sugar and hormone balance
  • Collagen: 10-15g per day for skin and bone health (with vitamin C)
  • Vitamin B1, B6: Appropriate dosages for energy and nervous system health
  • Vitamin D: Maintain blood levels at 30ng/mL or above (personalized recommendation)
  • Multivitamin: Practical choice for basic nutrient supplementation

Important cautions: All supplements should be taken considering individual health status, medications being taken, and allergies. Especially if pregnant or have chronic conditions, always consult with a healthcare professional before starting new supplements. Supplements play a complementary role to a balanced diet, regular exercise, and adequate sleep and cannot replace them. Maximum benefits can be expected when healthy lifestyle habits are combined with science-based supplement use.