Formula Adjustments for Body Lotions

Here are the suggested adjustments for your four body lotion formulas to address the issues you've encountered and incorporate the staff's feedback.

1. Hydrating Body Lotion (Smell Issue)

You reported a strong rancid smell in this formula. The staff suggested removing natural oils, especially Argania Spinosa Kernel Oil, or adding a deodorizing agent.

Natural oils can oxidize and cause rancidity. Your formula contains Argania Spinosa Kernel Oil and butyrospermum parkii butter (Shea Butter).

Suggested Adjustments:

• Option 1 (Recommended): Replace the standard Argania Spinosa Kernel Oil with a deodorized version. "Argan Oil (Organic - Virgin - Deodorized)" is available and specifically processed to remove the nutty, rancid smell while retaining its moisturizing properties.
• Option 2: If the smell persists or you suspect other oils, consider reducing the concentration of natural oils or replacing them with more stable synthetic emollients like Caprylic/Capric Triglyceride or Ethylhexyl Stearate, which are already in your formula.
• Option 3: Incorporate a deodorizing agent designed for cosmetic formulations. The staff mentioned "Citromask". While a direct product match wasn't found in the search, you can look for cosmetic-grade ingredients specifically designed to neutralize odors in formulations.

By addressing the source of the rancidity, you should be able to eliminate the unpleasant smell while keeping the formula's good moisturizing performance.

2. Sunscreen Body Lotion (SPF50+ PA+++, IR/Blue Light Claims)

You want to use this face sunscreen formula for the body and noted its claims regarding UVA, UVB, Infrared, and Blue Light protection. The staff mentioned that IR and Blue Light protection claims are not currently regulated by the Thai FDA.

Your formula contains Titanium Dioxide and Zinc Oxide, which are physical sunscreen filters effective against UVA and UVB rays.

Suggested Adjustments:

• Sun Protection: The combination of Titanium Dioxide and Zinc Oxide provides broad-spectrum UV protection. To ensure SPF50+ PA+++ for a body product, the concentration and dispersion of these filters are crucial. Ensure you are using sunscreen-grade Titanium Dioxide and Zinc Oxide suitable for UV protection, not just pigment grade. Options like "Titanium Dioxide Transparent (15nm, Water-Dispersion)" or "Zinc Oxide 40nm Dispersion (Water Base)" could be considered for better dispersion and reduced whitening, which is often preferred for body lotions.
• IR and Blue Light Claims: As the staff noted, claims for protection against Infrared and Blue Light are not standardized or regulated by the FDA in Thailand. While some ingredients might offer some protection, you should avoid making explicit SPF/PA-like claims for these types of radiation to comply with regulations. You can mention the presence of ingredients that may help protect against these light sources, but the primary claim should focus on the proven UVA/UVB protection.
• Formula Adaptation for Body: Since this is originally a face formula, you might want to adjust the texture for body application. This could involve modifying the levels of emollients (like Cyclomethicone, Dimethicone, Hydrogenated Polydecene) or thickeners (like Talc, Carbomer) to achieve a desired feel and spreadability for a larger skin area.

3. Whitening Body Lotion (Needs More Moisture)

You found this formula effective for whitening but lacking in moisture, especially for skin that is becoming drier and showing signs of aging (roughness, slower healing of dark spots/scars, "chicken skin") as you approach 40.

Your formula contains several moisturizing ingredients and whitening ingredients.

Suggested Adjustments for Increased Moisture:

To enhance the moisturizing properties for mature, dry skin, consider increasing the concentration of existing humectants and emollients or adding new ones:

• Increase Humectants: Increase the percentage of Glycerin, Sodium Lactate, or Sodium Hyaluronate. You could also explore different molecular weights of Hyaluronic Acid for multi-depth hydration.
• Enhance Emolliency: Increase the amounts of existing oils and butters like Cocos Nucifera Oil, Olive Butter, Argan Oil (consider the deodorized version), or Sunflower Oil. Adding richer butters or oils known for their moisturizing properties could also be beneficial.
• Incorporate Skin Barrier Repairing Lipids: Ingredients like Ceramides and Cholesterol are essential components of the skin barrier and can significantly improve dryness and roughness. Consider adding or increasing these in this whitening formula.
• Add Occlusives: Ingredients that form a protective layer on the skin to prevent water loss can boost hydration. Emollients like Caprylic/Capric Triglyceride and Dimethicone already in your formulas contribute to this.

Focusing on a combination of humectants, emollients, and barrier repair ingredients will help address the dryness and improve the skin's texture and resilience, complementing the whitening effects.

4. Anti-Aging Body Lotion

You want to use this formula for reducing body wrinkles. The staff correctly identified that Cholecalciferol in this formula is illegal for use in cosmetics in Thailand and Europe.

Your formula contains several anti-aging ingredients and moisturizing/emollient ingredients.

Suggested Adjustments:

• Remove Illegal Ingredient: You MUST remove Cholecalciferol from the formula as it is prohibited.
• Enhance Anti-Aging Efficacy: The formula already contains good anti-aging ingredients like Retinol, Retinyl Palmitate, Ascorbic Acid, and Vitamin E. Ensure these are used at effective and safe concentrations. Consider incorporating more stable forms of Vitamin C if Ascorbic Acid stability is a concern.
• Address Mature Skin Concerns: Given your skin concerns (roughness, slower healing, "chicken skin"), focus on ingredients that support skin renewal, barrier function, and hydration. Ingredients like Allantoin are good for soothing and promoting tissue formation. Ceramides and Cholesterol are also excellent for improving skin barrier function and overall skin health, which is crucial for anti-aging. Peptides are another class of ingredients known for their anti-aging benefits.
• Moisture and Texture: Ensure the emollient and humectant system (oils, butters, Glycerin, etc.) is sufficient to keep mature skin well-hydrated and smooth. Adjusting the levels of ingredients like Dimethicone, Caprylic/capric triglyceride, and waxes like Beeswax can help achieve the desired texture and feel for a body lotion.

By removing the illegal ingredient and focusing on a robust combination of legal and effective anti-aging, moisturizing, and skin-supporting ingredients, you can create an effective anti-aging body lotion.

These are general suggestions. The specific percentages of each ingredient would need to be determined based on desired texture, performance, and regulatory limits for each ingredient. Always perform stability testing on your final formulations.